outlet temperature range
type: ObjectProperty
comment: Allowable outlet temperature of either the water or the steam. Usually measured in degrees Kelvin (K).

first curvature radius
type: ObjectProperty
comment: FirstCurvatureRadius should be defined as the base or left side radius of curvature value. Usually measured in millimeters (mm).

isolator compressibility
type: ObjectProperty
comment: The compressibility of the vibration isolator.

Evaporative cooler
type: Class
comment: An evaporative cooler is a device that cools air by saturating it with water vapor.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: heat exchange area
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: water requirement
subclass of: Restriction
  all values from: string
  on property: flow arrangement
had primary source: pset evaporativecoolertypecommon.htm
had primary source: ifcevaporativecooler.htm

has value
type: DatatypeProperty
comment: A relationship defining the value of a certain property, e.g., energy or power

Space heater
type: Class
comment: Space heaters utilize a combination of radiation and/or natural convection using a heating source such as electricity, steam or hot water to heat a limited space or area. Examples of space heaters include radiators, convectors, baseboard and finned-tube heaters. UnitaryEquipment should be used for packaged units supporting a combination of heating, cooling, and/or dehumidification; Coil should be used for coil-based floor heating.
subclass of: Flow terminal
subclass of: Restriction
  all values from: string
  on property: temperature classification
subclass of: Restriction
  all values from: string
  on property: heat transfer dimension
subclass of: Restriction
  all values from: Measurement
  on property: thermal mass heat capacity
subclass of: Restriction
  all values from: string
  on property: heat transfer medium
subclass of: Restriction
  all values from: integer
  on property: number of panels
subclass of: Restriction
  all values from: string
  on property: energy source
subclass of: Restriction
  all values from: Measurement
  on property: output capacity
subclass of: Restriction
  all values from: Measurement
  on property: thermal efficiency
subclass of: Restriction
  all values from: string
  on property: placement type
subclass of: Restriction
  all values from: Measurement
  on property: body mass
subclass of: Restriction
  all values from: integer
  on property: number of sections
had primary source: pset spaceheatertypecommon.htm
had primary source: ifcspaceheater.htm

primary frequency
type: ObjectProperty
comment: The frequency that is going to be transformed and that runs into the transformer on the primary side. Usually measured in cycles/s or Hertz (Hz).

contains
type: TransitiveProperty
type: ObjectProperty
comment: A relation between a physical space and the objects located in such space.
inverse of: is contained in

real impedance ratio
type: ObjectProperty
comment: The ratio between the real part of the zero sequence impedance and the real part of the positive impedance (i.e. real part of the short-circuit voltage) of the transformer. Used for three-phase transformer which includes a N-conductor.

nominal depth
type: ObjectProperty
comment: The nominal depth of the tank. Note: Not required for a horizontal cylindrical tank. Usually measured in millimeters (mm).

fluid flow rate range
type: ObjectProperty
comment: Possible range of fluid flowrate that can be delivered. Usually measured in m3/s.

body mass
type: ObjectProperty
comment: Overall body mass of the heater. Usually measured in kilograms (kg) or grams (g).

Flow treatment device
type: Class
comment: The distribution flow element FlowTreatmentDevice defines the occurrence of a device typically used to remove unwanted matter from a fluid, either liquid or gas, and typically participates in a flow distribution system.
subclass of: DistributionFlowDevice
had primary source: ifcflowtreatmentdevice.htm

Vibration isolator
type: Class
comment: A vibration isolator is a device used to minimize the effects of vibration transmissibility in a building.
subclass of: Device
subclass of: Restriction
  all values from: Measurement
  on property: height
subclass of: Restriction
  all values from: Measurement
  on property: maximum supported weight
subclass of: Restriction
  all values from: Measurement
  on property: isolator static deflection
subclass of: Restriction
  all values from: Measurement
  on property: isolator compressibility
subclass of: Restriction
  all values from: Measurement
  on property: vibration transmissibility
had primary source: ifcvibrationisolator.htm
had primary source: pset vibrationisolatortypecommon.htm

locked rotor current
type: ObjectProperty
comment: Input current when a motor armature is energized but not rotating. Usually measured in Ampere (A).

starting time
type: ObjectProperty
comment: The time (in s) needed for the motor to reach its rated speed with its driven equipment attached, starting from standstill and at the nominal voltage applied at its terminals.

connection size
type: ObjectProperty
comment: The connection size of the to and from the pump. Usually measured in millimeters (mm).

Flow storage device
type: Class
comment: The distribution flow element FlowStorageDevice defines the occurrence of a device that participates in a distribution system and is used for temporary storage (such as a tank).
subclass of: DistributionFlowDevice
had primary source: ifcflowstoragedevice.htm

Lamp
type: Class
comment: A lamp is an artificial light source such as a light bulb or tube.
subclass of: Flow terminal
subclass of: Restriction
  all values from: integer
  on property: color rendering index
subclass of: Restriction
  all values from: string
  on property: color appearance
subclass of: Restriction
  all values from: string
  on property: lamp ballast type
subclass of: Restriction
  all values from: Measurement
  on property: lamp maintenance factor
subclass of: Restriction
  all values from: Measurement
  on property: maximum spectrum
subclass of: Restriction
  all values from: Measurement
  on property: minimum spectrum
subclass of: Restriction
  all values from: Measurement
  on property: color temperature
subclass of: Restriction
  all values from: Measurement
  on property: contributed luminous flux
subclass of: Restriction
  all values from: string
  on property: lamp compensation type
subclass of: Restriction
  all values from: Measurement
  on property: light emitter nominal power
had primary source: ifclamp.htm
had primary source: pset lamptypecommon.htm

Engine
type: Class
comment: An engine is a device that converts fuel into mechanical energy through combustion.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: string
  on property: energy source
had primary source: pset enginetypecommon.htm
had primary source: ifcengine.htm

controller
type: Class
comment: A controller is a device that monitors inputs and controls outputs within a building automation system. A controller may be physical (having placement within a spatial structure) or logical (a software interface or aggregated within a programmable physical controller).
subclass of: Distribution control device
had primary source: ifccontroller.htm
had primary source: pset controllertypecommon.htm

solar transmittance
type: ObjectProperty
comment: (Tsol) The ratio of incident solar radiation that directly passes through a shading system (also named _e). Note the following equation Asol + Rsol + Tsol = 1

Switching device
type: Class
comment: A switch is used in a cable distribution system (electrical circuit) to control or modulate the flow of electricity. Switches include those used for electrical power, communications, audio-visual, or other distribution system types as determined by the available ports.
subclass of: Flow controller
subclass of: Restriction
  all values from: integer
  on property: number of gangs
subclass of: Restriction
  all values from: string
  on property: legend
subclass of: Restriction
  all values from: boolean
  on property: is illuminated
subclass of: Restriction
  all values from: boolean
  on property: has lock
subclass of: Restriction
  all values from: string
  on property: switch function
had primary source: pset switchingdevicetypecommon.htm
had primary source: ifcswitchingdevice.htm

Device
type: Class
comment: A tangible object designed to accomplish a particular task in households, common public buildings or offices. In order to accomplish this task, the device performs one or more functions. For example, a washing machine is designed to wash (task) and to accomplish this task it performs the start and stop function.
subclass of: Physical object

is guarded
type: DatatypeProperty
comment: Indication of whether the motor enclosure is guarded (= TRUE) or not (= FALSE).
range: boolean

outlet connection size
type: ObjectProperty
comment: Size of the outlet connection. Usually measured in millimeters (mm).

cover width
type: ObjectProperty
comment: The length measured along the x-axis in the local coordinate system of the cover of the oil interceptor. Usually measured in millimeters (mm).

nominal length or diameter
type: ObjectProperty
comment: The nominal length or, in the case of a vertical cylindrical tank, the nominal diameter of the tank. Usually measured in millimeters (mm).

Interceptor
type: Class
comment: An interceptor is a device designed and installed in order to separate and retain deleterious, hazardous or undesirable matter while permitting normal sewage or liquids to discharge into a collection system by gravity.
subclass of: Flow treatment device
subclass of: Restriction
  all values from: Measurement
  on property: cover width
subclass of: Restriction
  all values from: Measurement
  on property: cover length
subclass of: Restriction
  all values from: Measurement
  on property: ventilating pipe size
subclass of: Restriction
  all values from: Measurement
  on property: inlet connection size
subclass of: Restriction
  all values from: Measurement
  on property: nominal body width
subclass of: Restriction
  all values from: Measurement
  on property: outlet connection size
subclass of: Restriction
  all values from: Measurement
  on property: nominal body depth
subclass of: Restriction
  all values from: Measurement
  on property: nominal body length
had primary source: pset interceptortypecommon.htm
had primary source: ifcinterceptor.htm

is external
type: DatatypeProperty
comment: Indication whether the element is designed for use in the exterior (TRUE) or not (FALSE). If (TRUE) it is an external element and faces the outside of the building.
range: boolean

control strategy
type: DatatypeProperty
comment: FixedExitingWaterTemp: The capacity is controlled to maintain a fixed exiting water temperature. WetBulbTempReset: The set-point is reset based on the wet-bulb temperature.
range: string

capacity control type
type: DatatypeProperty
comment: InletVane: Control by adjusting inlet vane. VariableSpeedDrive: Control by variable speed drive. BladePitchAngle: Control by adjusting blade pitch angle. TwoSpeed: Control by switch between high and low speed. DischargeDamper: Control by modulating discharge damper.
range: string

face area
type: ObjectProperty
comment: Face area open to the airstream. Usually measured in square metre (m2).

nominal sorrounding temperature cooling
type: ObjectProperty
comment: Nominal surrounding temperature (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).

fire exit
type: DatatypeProperty
comment: Indication whether this object is designed to serve as an exit in the case of fire (TRUE) or not (FALSE). Here whether the transport element (in case of e.g., a lift) is designed to serve as a fire exit, e.g., for fire escape purposes.
range: boolean

water pressure range
type: ObjectProperty
comment: Allowable water circuit working pressure range. Usually measured in Pascals (Pa, N/m2).

number of sections
type: DatatypeProperty
comment: Number of sections used.
range: integer

nominal sorrounding temperature heating
type: ObjectProperty
comment: Nominal surrounding temperature (refers to nominal heating capacity). Usually measured in degrees Kelvin (K).

coil width
type: ObjectProperty
comment: Width of coil. Usually measured in millimeters (mm

Tank
type: Class
comment: A tank is a vessel or container in which a fluid or gas is stored for later use.
subclass of: Flow storage device
subclass of: Restriction
  all values from: string
  on property: access type
subclass of: Restriction
  all values from: Measurement
  on property: nominal depth
subclass of: Restriction
  all values from: Measurement
  on property: nominal width or diameter
subclass of: Restriction
  all values from: Measurement
  on property: nominal volumetric capacity
subclass of: Restriction
  all values from: Measurement
  on property: nominal length or diameter
subclass of: Restriction
  all values from: Measurement
  on property: second curvature radius
subclass of: Restriction
  all values from: Measurement
  on property: first curvature radius
subclass of: Restriction
  all values from: Measurement
  on property: operating wight
subclass of: Restriction
  all values from: integer
  on property: number of sections
subclass of: Restriction
  all values from: string
  on property: end shape type
subclass of: Restriction
  all values from: Measurement
  on property: effective capacity
subclass of: Restriction
  all values from: string
  on property: pattern type
subclass of: Restriction
  all values from: string
  on property: storage type
had primary source: pset tanktypecommon.htm
had primary source: ifctank.htm

pattern type
type: DatatypeProperty
comment: Defines the types of pattern (or shape of a tank that may be specified.
range: string

energy source
type: DatatypeProperty
comment: Enumeration defining the energy source or fuel cumbusted to generate heat.
comment: The source of energy.
range: string

Coil
type: Class
comment: A coil is a device used to provide heat transfer between non-mixing media. A common example is a cooling coil, which utilizes a finned coil in which circulates chilled water, antifreeze, or refrigerant that is used to remove heat from air moving across the surface of the coil. A coil may be used either for heating or cooling purposes by placing a series of tubes (the coil) carrying a heating or cooling fluid into an airstream. The coil may be constructed from tubes bundled in a serpentine form or from finned tubes that give a extended heat transfer surface. Coils may also be used for non-airflow cases such as embedded in a floor slab.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: nominal latent capacity
subclass of: Restriction
  all values from: Measurement
  on property: air flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: nominal sensible capacity
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: nominal ua
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: string
  on property: placement type
subclass of: Restriction
  all values from: Measurement
  on property: air flow rate range
had primary source: pset coiltypecommon.htm
had primary source: ifccoil.htm

thermal efficiency
type: ObjectProperty
comment: Overall Thermal Efficiency is defined as gross energy output of the heat transfer device divided by the energy input.

water storage capacity
type: ObjectProperty
comment: Water storage capacity. Usually measured in cubic metre (m3).

nominal supply voltage offset
type: ObjectProperty
comment: The maximum and minimum allowed voltage of the supply e.g. boundaries of 380V/440V may be applied for a nominal voltage of 400V.

number of gangs
type: DatatypeProperty
comment: Number of gangs/buttons on this switch.
range: integer

motor drive type
type: DatatypeProperty
comment: Motor drive type: DIRECTDRIVE: Direct drive. BELTDRIVE: Belt drive. COUPLING: Coupling. OTHER: Other type of motor drive. UNKNOWN: Unknown motor drive type.
range: string

Compressor
type: Class
comment: A compressor is a device that compresses a fluid typically used in a refrigeration circuit.
subclass of: Flow moving device
subclass of: Restriction
  all values from: Measurement
  on property: ideal capacity
subclass of: Restriction
  all values from: Measurement
  on property: impeller diameter
subclass of: Restriction
  all values from: string
  on property: refrigerant class
subclass of: Restriction
  all values from: Measurement
  on property: maximum part load ratio
subclass of: Restriction
  all values from: Measurement
  on property: minimum part load ratio
subclass of: Restriction
  all values from: string
  on property: power source
subclass of: Restriction
  all values from: Measurement
  on property: nominal capacity
subclass of: Restriction
  all values from: Measurement
  on property: compressor speed
subclass of: Restriction
  all values from: Measurement
  on property: ideal shaft power
subclass of: Restriction
  all values from: boolean
  on property: has hot gas bypass
had primary source: pset compressortypecommon.htm
had primary source: ifccompressor.htm

legend
type: DatatypeProperty
comment: A text inscribed or applied to the switch as a legend to indicate purpose or function.
range: string

Electric time control
type: Class
comment: An electric time control is a device that applies control to the provision or flow of electrical energy over time.
subclass of: Flow controller
had primary source: ifcelectrictimecontrol.htm
had primary source: pset electrictimecontroltypecommon.htm

communication appliance
type: Class
comment: A communications appliance transmits and receives electronic or digital information as data or sound. Communication appliances may be fixed in place or may be able to be moved from one space to another. Communication appliances require an electrical supply that may be supplied either by an electrical circuit or provided from a local battery source.
subclass of: Flow terminal
had primary source: pset communicationsappliancetypecommon.htm
had primary source: ifccommunicationsappliance.htm

flow arrangement
type: DatatypeProperty
comment: CounterFlow: Air and water flow enter in different directions. CrossFlow: Air and water flow are perpendicular. ParallelFlow: air and water flow enter in same directions.
range: string

nominal evaporating temmperature
type: ObjectProperty
comment: Chiller evaporating temperature.Usually measured in degrees Kelvin (K).

Flow meter
type: Class
comment: A flow meter is a device that is used to measure the flow rate in a system.
subclass of: Flow controller
subclass of: Restriction
  all values from: string
  on property: read out type
subclass of: Restriction
  all values from: boolean
  on property: remote reading
had primary source: pset flowmetertypecommon.htm
had primary source: ifcflowmeter.htm

electric appliance
type: Class
comment: An electric appliance is a device intended for consumer usage that is powered by electricity. Electric appliances may be fixed in place or may be able to be moved from one space to another. Electric appliances require an electrical supply that may be supplied either by an electrical circuit or provided from a local battery source.
subclass of: Flow terminal
had primary source: pset electricappliancetypecommon.htm
had primary source: ifcelectricappliance.htm

manual override
type: DatatypeProperty
comment: Identifies whether hand-operated operation is provided as an override (= TRUE) or not (= FALSE). Note that this value should be set to FALSE by default in the case of a Hand Operated Actuator.
range: boolean

has hot gas bypass
type: DatatypeProperty
comment: Whether or not hot gas bypass is provided for the compressor. TRUE = Yes, FALSE = No.
range: boolean

Air to air heat recovery
type: Class
comment: An air-to-air heat recovery device employs a counter-flow heat exchanger between inbound and outbound air flow. It is typically used to transfer heat from warmer air in one chamber to cooler air in the second chamber (i.e., typically used to recover heat from the conditioned air being exhausted and the outside air being supplied to a building), resulting in energy savings from reduced heating (or cooling) requirements.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: secondary air flow rate range
subclass of: Restriction
  all values from: boolean
  on property: has defrost
subclass of: Restriction
  all values from: string
  on property: heat transfer type enum
subclass of: Restriction
  all values from: Measurement
  on property: secondary air flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: primary air flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: primary air flow rate range
had primary source: pset airtoairheatrecoverytypecommon.htm
had primary source: ifcairtoairheatrecovery.htm

test pressure
type: ObjectProperty
comment: The maximum pressure to which the valve has been subjected under test. Usually measured in Pascals (Pa, N/m2).

Transformer
type: Class
comment: A transformer is an inductive stationary device that transfers electrical energy from one circuit to another. Transformer is used to transform electric power; conversion of electric signals for other purposes is handled at other entities: Controller converts arbitrary signals, AudioVisualAppliance converts signals for audio or video streams, and CommunicationsAppliance converts signals for data or other communications usage.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: primary current
subclass of: Restriction
  all values from: string
  on property: secondary current type
subclass of: Restriction
  all values from: boolean
  on property: is neutral secondary terminal available
subclass of: Restriction
  all values from: Measurement
  on property: primary apparent power
subclass of: Restriction
  all values from: boolean
  on property: is neutral primary terminal available
subclass of: Restriction
  all values from: Measurement
  on property: primary voltage
subclass of: Restriction
  all values from: Measurement
  on property: real impedance ratio
subclass of: Restriction
  all values from: string
  on property: transformer vector group
subclass of: Restriction
  all values from: Measurement
  on property: secondary frequency
subclass of: Restriction
  all values from: Measurement
  on property: imaginary impedance ratio
subclass of: Restriction
  all values from: Measurement
  on property: primary frequency
subclass of: Restriction
  all values from: Measurement
  on property: maximum apparent power
subclass of: Restriction
  all values from: Measurement
  on property: secondary voltage
subclass of: Restriction
  all values from: Measurement
  on property: secondary current
subclass of: Restriction
  all values from: Measurement
  on property: secondary apparent power
had primary source: pset transformertypecommon.htm
had primary source: ifctransformer.htm

solar reflectance
type: ObjectProperty
comment: (Rsol): The ratio of incident solar radiation that is reflected by a shading system (also named _e). Note the following equation Asol + Rsol + Tsol = 1

Humidifier
type: Class
comment: A humidifier is a device that adds moisture into the air.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: nominal air flow rate
subclass of: Restriction
  all values from: Measurement
  on property: nominal moisture gain
subclass of: Restriction
  all values from: string
  on property: internal control
subclass of: Restriction
  all values from: string
  on property: application
subclass of: Restriction
  all values from: Measurement
  on property: water requirement
subclass of: Restriction
  all values from: Measurement
  on property: weight
had primary source: ifchumidifier.htm
had primary source: pset humidifiertypecommon.htm

heat exchange area
type: ObjectProperty
comment: Heat exchange area. Usually measured in square metre (m2).

Transport element
type: Class
comment: A transport element is a generalization of all transport related objects that move people, animals or goods within a building or building complex. The TransportElement defines the occurrence of a transport element.
subclass of: Device
subclass of: Restriction
  all values from: boolean
  on property: fire exit
subclass of: Restriction
  all values from: Measurement
  on property: capacity weight
subclass of: Restriction
  all values from: positiveInteger
  on property: capacity people
had primary source: ifctransportelement.htm
had primary source: pset transportelementcommon.htm

capacity control
type: DatatypeProperty
comment: FanCycling: Fan is cycled on and off to control duty. TwoSpeedFan: Fan is switched between low and high speed to control duty. VariableSpeedFan: Fan speed is varied to control duty. DampersControl: Dampers modulate the air flow to control duty. BypassValveControl: Bypass valve modulates the water flow to control duty. MultipleSeriesPumps: Turn on/off multiple series pump to control duty. TwoSpeedPump: Switch between high/low pump speed to control duty. VariableSpeedPump: vary pump speed to control duty.
range: string

inside diameter
type: ObjectProperty
comment: Actual inner diameter of the tube in the tube bundle. Usually measured in millimeters (mm).

media source
type: DatatypeProperty
comment: Indicates media sources and corresponding names of ports (DistributionPort with FlowDirection=SINK and PredefinedType=AUDIOVISUAL) or aggregated audio/video components (AudioVisualAppliance).
range: string

nominal body depth
type: ObjectProperty
comment: Nominal or quoted =length, measured along the z-axis of the local coordinate system of the object, of the body of the object. Usually measured in millimeters (mm).

heat transfer surface area
type: ObjectProperty
comment: Total heat transfer area of the vessel. Usually measured in square metre (m2).

pump flow rate range
type: ObjectProperty
comment: Allowable range of volume of fluid being pumped against the resistance specified. Usually measured in kg/s.

nominal volumetric capacity
type: ObjectProperty
comment: The total nominal or design volumetric capacity of the tank. Usually measured in cubic metre (m3).

audio visual appliance
type: Class
comment: An audio-visual appliance is a device that displays, captures, transmits, or receives audio or video. Audio-visual appliances may be fixed in place or may be able to be moved from one space to another. They may require an electrical supply that may be supplied either by an electrical circuit or provided from a local battery source. Audio-visual appliances may be connected to data circuits including specialist circuits for audio visual purposes only.
subclass of: Flow terminal
subclass of: Restriction
  all values from: Measurement
  on property: audio volume
subclass of: Restriction
  all values from: string
  on property: media source
had primary source: ifcaudiovisualappliance.htm
had primary source: pset audiovisualappliancetypecommon.htm

nominal width or diameter
type: ObjectProperty
comment: The nominal width or, in the case of a horizontal cylindrical tank, the nominal diameter of the tank. Note: Not required for a vertical cylindrical tank. Usually measured in millimeters (mm).

Electric motor
type: Class
comment: An electric motor is an engine that is a machine for converting electrical energy into mechanical energy.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: locked rotor current
subclass of: Restriction
  all values from: Measurement
  on property: maximum power output
subclass of: Restriction
  all values from: Measurement
  on property: electric motor efficiency
subclass of: Restriction
  all values from: boolean
  on property: has part winding
subclass of: Restriction
  all values from: boolean
  on property: is guarded
subclass of: Restriction
  all values from: Measurement
  on property: starting time
subclass of: Restriction
  all values from: Measurement
  on property: start current factor
subclass of: Restriction
  all values from: string
  on property: frame size
subclass of: Restriction
  all values from: Measurement
  on property: te time
subclass of: Restriction
  all values from: string
  on property: motor enclosure type
had primary source: ifcelectricmotor.htm
had primary source: pset electricmotortypecommon.htm

nominal water flow heating
type: ObjectProperty
comment: Nominal water flow (refers to nominal heating capacity). Usually measured in m3/s.

valve pattern
type: DatatypeProperty
comment: The configuration of the ports of a valve according to either the linear route taken by a fluid flowing through the valve or by the number of ports where: SINGLEPORT: Valve that has a single entry port from the system that it serves, the exit port being to the surrounding environment. ANGLED_2_PORT: Valve in which the direction of flow is changed through 90 degrees. STRAIGHT_2_PORT: Valve in which the flow is straight through. STRAIGHT_3_PORT: Valve with three separate ports. CROSSOVER_4_PORT: Valve with 4 separate ports.
range: string

secondary frequency
type: ObjectProperty
comment: The frequency that has been transformed and is running out of the transformer on the secondary side. Usually measured in cycles/s or Hertz (Hz).

nominal energy consumption
type: ObjectProperty
comment: Nominal fuel consumption rate required to produce the total boiler heat output. Usually measured in Watts (W, J/s).

roughness
type: DatatypeProperty
comment: A measure of the vertical deviations of the surface.
range: string

outside diameter
type: ObjectProperty
comment: Actual outside diameter of the tube in the tube bundle. Usually measured in millimeters (mm).

nominal sensible capacity
type: ObjectProperty
comment: Nominal sensible capacity. Usually measured in Watts (W, J/s).

Flow controller
type: Class
comment: The distribution flow element FlowController defines the occurrence of elements of a distribution system that are used to regulate flow through a distribution system. Examples include dampers, valves, switches, and relays.
subclass of: DistributionFlowDevice
had primary source: ifcflowcontroller.htm

visible light transmittance
type: ObjectProperty
comment: Fraction of the visible light that passes the shading system at normal incidence. It is a value without unit.

fluid flow rate range
type: ObjectProperty
comment: Possible range of fluid flowrate that can be delivered. Usually measured in m3/s.

valve operation
type: DatatypeProperty
comment: The method of valve operation where: DROPWEIGHT: A valve that is closed by the action of a weighted lever being released, the weight normally being prevented from dropping by being held by a wire, the closure normally being made by the action of heat on a fusible link in the wire FLOAT: A valve that is opened and closed by the action of a float that rises and falls with water level. The float may be a ball attached to a lever or other mechanism HYDRAULIC: A valve that is opened and closed by hydraulic actuation LEVER: A valve that is opened and closed by the action of a lever rotating the gate within the valve. LOCKSHIELD: A valve that requires the use of a special lockshield key for opening and closing, the operating mechanism being protected by a shroud during normal operation. MOTORIZED: A valve that is opened and closed by the action of an electric motor on an actuator PNEUMATIC: A valve that is opened and closed by pneumatic actuation SOLENOID: A valve that is normally held open by a magnetic field in a coil acting on the gate but that is closed immediately if the electrical current generating the magnetic field is removed. SPRING: A valve that is normally held in position by the pressure of a spring on a plate but that may be caused to open if the pressure of the fluid is sufficient to overcome the spring pressure. THERMOSTATIC: A valve in which the ports are opened or closed to maintain a required predetermined temperature. WHEEL: A valve that is opened and closed by the action of a wheel moving the gate within the valve.
range: string

nominal body width
type: ObjectProperty
comment: Nominal or quoted length, measured along the y-axis of the local coordinate system of the object, of the body of the object. Usually measured in millimeters (mm).

circuit type
type: DatatypeProperty
comment: OpenCircuit: Exposes water directly to the cooling atmosphere. CloseCircuit: The fluid is separated from the atmosphere by a heat exchanger. Wet: The air stream or the heat exchange surface is evaporatively cooled. Dry: No evaporation into the air stream. DryWet: A combination of a dry tower and a wet tower.
range: string

nominal sorrounding humidity cooling
type: ObjectProperty
comment: Nominal surrounding humidity (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).

length
type: ObjectProperty
comment: The finished length of the device. Usually measured in millimeters (mm).

flow coefficient
type: ObjectProperty
comment: Flow coefficient (the quantity of fluid that passes through a fully open valve at unit pressure drop), typically expressed as the Kv or Cv value for the valve.

minimum working pressure
type: ObjectProperty
comment: Allowable minimum working pressure (relative to ambient pressure). Usually measured in Pascals (Pa, N/m2).

finish color
type: DatatypeProperty
comment: Finish color for cooled beam.
range: string

frame type
type: DatatypeProperty
comment: The type of frame used by the damper (e.g., Standard, Single Flange, Single Reversed Flange, Double Flange, etc.).
range: string

placement type
type: DatatypeProperty
comment: Indicates how the device is designed to be placed.
range: string

mechanical operated
type: DatatypeProperty
comment: Indication whether the element is operated machanically (TRUE) or not, i.e. manually (FALSE).
range: boolean

light emitter nominal power
type: ObjectProperty
comment: Light emitter nominal power. Usually measured in Watts (W, J/s).

Sensor
type: Class
comment: A device that detects and responds to events or changes in the physical environment such as light, motion, or temperature changes. A device that has category saref:Sensor and performs a saref:SensingFunction.

nominal power consumption
type: ObjectProperty
comment: Nominal total power consumption. Usually measured in Watts (W, J/s).

nominal air flow rate
type: ObjectProperty
comment: Nominal rate of air flow. Usually measured in m3/s.

secondary apparent power
type: ObjectProperty
comment: The power in VA (volt ampere) that has been transformed and is running out of the transformer on the secondary side. Usually measured in Watts (W, J/s).

internal control
type: DatatypeProperty
comment: Internal modulation control.
range: string

nominal cooling capacity
type: ObjectProperty
comment: Nominal cooling capacity. Usually measured in Watts (W, J/s).

nominal efficiency
type: ObjectProperty
comment: Nominal chiller efficiency under nominal conditions.

integrated lighting type
type: DatatypeProperty
comment: Integrated lighting in cooled beam.
range: string

Evaporator
type: Class
comment: An evaporator is a device in which a liquid refrigerent is vaporized and absorbs heat from the surrounding fluid.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: string
  on property: evaporation medium type
subclass of: Restriction
  all values from: string
  on property: evaporation coolant
subclass of: Restriction
  all values from: Measurement
  on property: nominal heat transfer coefficient
subclass of: Restriction
  all values from: Measurement
  on property: internal water volume
subclass of: Restriction
  all values from: Measurement
  on property: nominal heat transfer area
subclass of: Restriction
  all values from: string
  on property: refrigerant class
subclass of: Restriction
  all values from: Measurement
  on property: internal surface area
subclass of: Restriction
  all values from: Measurement
  on property: external surface area
subclass of: Restriction
  all values from: Measurement
  on property: internal refrigerant volume
had primary source: pset evaporatortypecommon.htm
had primary source: ifcevaporator.htm

outlet temperature range
type: ObjectProperty
comment: Allowable outlet temperature of either the water or the steam. Usually measured in degrees Kelvin (K).

water inlet temperature range
type: ObjectProperty
comment: Allowable water inlet temperature range. Usually measured in degrees Kelvin (K).

Duct silencer
type: Class
comment: A duct silencer is a device that is typically installed inside a duct distribution system for the purpose of reducing the noise levels from air movement, fan noise, etc. in the adjacent space or downstream of the duct silencer device.
subclass of: Flow treatment device
subclass of: Restriction
  all values from: Measurement
  on property: maximum working pressure
subclass of: Restriction
  all values from: Measurement
  on property: minimum working pressure
subclass of: Restriction
  all values from: Measurement
  on property: air flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: length
subclass of: Restriction
  all values from: Measurement
  on property: hydraulic diameter
subclass of: Restriction
  all values from: Measurement
  on property: air flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: weight
subclass of: Restriction
  all values from: boolean
  on property: has exterior insulation
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
had primary source: ifcductsilencer.htm
had primary source: pset ductsilencertypecommon.htm

nominal power rate
type: ObjectProperty
comment: Nominal fan power rate.Usually measured in Watts (W, J/s).

hydraulic diameter
type: ObjectProperty
comment: Hydraulic diameter. Usually measured in millimeters (mm).

Protective device
type: Class
comment: A protective device breaks an electrical circuit when a stated electric current that passes through it is exceeded. A protective device provides protection against electrical current only (not as a general protective device). It may be used to represent the complete set of elements including both the tripping unit and the breaking unit that provide the protection. This may be particularly useful at earlier stages of design where the approach to breaking the electrical supply may be determined but the method of tripping may not. Alternatively, this entity may be used to specifically represent the breaking unit alone (in which case the tripping unit will also be specifically identified). This entity is specific to dedicated protective devices and excludes electrical outlets that may have circuit protection.
subclass of: Flow controller
had primary source: ifcprotectivedevice.htm
had primary source: pset protectivedevicetypecommon.htm

frame thickness
type: ObjectProperty
comment: The thickness of the damper frame material. Usually measured in millimeters (mm).

nominal rotation speed
type: ObjectProperty
comment: Nominal fan wheel speed. Usually measured in cycles/s.

fail position
type: DatatypeProperty
comment: Specifies the required fail-safe position of the actuator.
range: string

Distribution device
type: Class
comment: Generalization of all devices that participate in a distribution system. (Definition adapated from http://www.buildingsmart-tech.org/ifc/IFC4/Add1/html/schema/ifcproductextension/lexical/ifcdistributionelement.htm)
subclass of: Building device

pump flow rate range
type: ObjectProperty
comment: Allowable range of volume of fluid being pumped against the resistance specified. Usually measured in kg/s.

minimum part load ratio
type: ObjectProperty
comment: Minimum part load ratio as a fraction of nominal capacity.

heat transfer type enum
type: DatatypeProperty
comment: Type of heat transfer between the two air streams.
range: string

operation
type: DatatypeProperty
comment: The operational mechanism for the damper operation.
range: string

Pump
type: Class
comment: A pump is a device which imparts mechanical work on fluids or slurries to move them through a channel or pipeline. A typical use of a pump is to circulate chilled water or heating hot water in a building services distribution system.
subclass of: Flow moving device
subclass of: Restriction
  all values from: Measurement
  on property: flow resistance range
subclass of: Restriction
  all values from: Measurement
  on property: connection size
subclass of: Restriction
  all values from: Measurement
  on property: flow resistance range
subclass of: Restriction
  all values from: Measurement
  on property: pump flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: pump flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: net positive suction head
subclass of: Restriction
  all values from: Measurement
  on property: nomminal rotation speed
had primary source: ifcpump.htm
had primary source: pset pumptypecommon.htm

Shading device
type: Class
comment: Shading devices are purpose built devices to protect from the sunlight, from natural light, or screening them from view. Shading devices can form part of the facade or can be mounted inside the building, they can be fixed or operable.
subclass of: Building device
subclass of: Restriction
  all values from: string
  on property: shading device type
subclass of: Restriction
  all values from: Measurement
  on property: solar reflectance
subclass of: Restriction
  all values from: Measurement
  on property: visible light transmittance
subclass of: Restriction
  all values from: boolean
  on property: is external
subclass of: Restriction
  all values from: boolean
  on property: mechanical operated
subclass of: Restriction
  all values from: Measurement
  on property: thermal transmittance
subclass of: Restriction
  all values from: Measurement
  on property: solar transmittance
subclass of: Restriction
  all values from: Measurement
  on property: visible light reflectance
subclass of: Restriction
  all values from: string
  on property: roughness
had primary source: pset shadingdevicecommon.htm
had primary source: ifcshadingdevice.htm

orientation
type: DatatypeProperty
comment: The intended orientation for the damper as specified by the manufacturer.
range: string

is water storage heater
type: DatatypeProperty
comment: This is used to identify if the boiler has storage capacity (TRUE). If FALSE, then there is no storage capacity built into the boiler, such as an instantaneous hot water heater.
range: boolean

lift elevation difference
type: ObjectProperty
comment: Elevation difference between cooling tower sump and the top of the tower. Usually measured in millimeters (mm).

has lock
type: DatatypeProperty
comment: Indication of whether a switching device has a key operated lock (=TRUE) or not (= FALSE).
range: boolean

frame depth
type: ObjectProperty
comment: The length (or depth) of the damper frame. Usually measured in millimeters (mm).

Measurement
type: Class
comment: Represents the measured value made over a property. It is also linked to the unit of measure in which the value is expressed and the timestamp of the measurement.
subclass of: Restriction
  on data range: float
  on property: has value
  qualified cardinality: 1
subclass of: Restriction
  all values from: Property
  on property: relates to property
subclass of: Restriction
  all values from: Unit of measure
  on property: is measured in
subclass of: Restriction
  on class: Unit of measure
  on property: is measured in
  qualified cardinality: 1
subclass of: Restriction
  all values from: dateTime
  on property: has timestamp
subclass of: Restriction
  on class: Property
  on property: relates to property
  qualified cardinality: 1
disjoint with: Unit of measure
disjoint with: Property

compressor speed
type: ObjectProperty
comment: Compressor speed. Usually measured in cycles/s.

Medical device
type: Class
comment: A medical device is attached to a medical piping system and operates upon medical gases to perform a specific function. Medical gases include medical air, medical vacuum, oxygen, carbon dioxide, nitrogen, and nitrous oxide.
subclass of: Flow terminal
had primary source: ifcmedicaldevice.htm
had primary source: pset medicaldevicetypecommon.htm

height
type: ObjectProperty
comment: Height of the vibration isolator before tha application of load. Usually measured in millimeters (mm).

arrangement
type: DatatypeProperty
comment: Defines the basic flow arrangements for the heat exchanger: COUNTERFLOW: Counterflow heat exchanger arrangement. CROSSFLOW: Crossflow heat exchanger arrangement. PARALLELFLOW: Parallel flow heat exchanger arrangement. MULTIPASS: Multipass flow heat exchanger arrangement. OTHER: Other type of heat exchanger flow arrangement not defined above.
range: string

blade shape
type: DatatypeProperty
comment: Blade shape. Flat means triple V-groove.
range: string

has timestamp
type: FunctionalProperty
type: DatatypeProperty
comment: A relationship stating the timestamp of an entity (e.g. a measurement).
range: dateTime

valve mechanism
type: DatatypeProperty
comment: The mechanism by which the valve function is achieved where: BALL: Valve that has a ported ball that can be turned relative to the body seat ports. BUTTERFLY: Valve in which a streamlined disc pivots about a diametric axis. CONFIGUREDGATE: Screwdown valve in which the closing gate is shaped in a configured manner to have a more precise control of pressure and flow change across the valve. GLAND: Valve with a tapered seating, in which a rotatable plug is retained by means of a gland and gland packing. GLOBE: Screwdown valve that has a spherical body. LUBRICATEDPLUG: Plug valve in which a lubricant is injected under pressure between the plug face and the body. NEEDLE: Valve for regulating the flow in or from a pipe, in which a slender cone moves along the axis of flow to close against a fixed conical seat. PARALLELSLIDE: Screwdown valve that has a machined plate that slides in formed grooves to form a seal. PLUG: Valve that has a ported plug that can be turned relative to the body seat ports. WEDGEGATE: Screwdown valve that has a wedge shaped plate fitting into tapered guides to form a seal.
range: string

open pressure drop
type: ObjectProperty
comment: Total pressure drop across damper. Usually measured in Pascals (Pa, N/m2).

final resistance
type: ObjectProperty
comment: Filter fluid resistance when replacement is required (i.e., Pressure drop at the maximum air flowrate across the filter when the filter needs replacement per ASHRAE Standard 52.1). Usually measured in Pascals (Pa, N/m2).

is contained in
type: TransitiveProperty
type: ObjectProperty
comment: A relation between an object and the physical space in which it is located.

Actuator
type: Class
comment: An actuator is a mechanical device for moving or controlling a mechanism or system. An actuator takes energy, usually created by air, electricity, or liquid, and converts that into some kind of motion.
subclass of: Distribution control device
subclass of: Actuator
subclass of: Restriction
  all values from: string
  on property: fail position
subclass of: Restriction
  all values from: boolean
  on property: manual override
had primary source: ifcactuator.htm
had primary source: pset actuatortypecommon.htm

air flow rate range
type: ObjectProperty
comment: Minimum allowable air flow rate. Usually measured in m3/s.

number of blades
type: DatatypeProperty
comment: Number of blades.
range: integer

nominal static pressure
type: ObjectProperty
comment: The static pressure within the air stream that the fan must overcome to insure designed circulation of air. Usually measured in Pascals (Pa, N/m2).

visible light reflectance
type: ObjectProperty
comment: Fraction of the visible light that is reflected by the glazing at normal incidence. It is a value without unit.

water pressure range
type: ObjectProperty
comment: Allowable water circuit working pressure range. Usually measured in Pascals (Pa, N/m2).

nominal latent capacity
type: ObjectProperty
comment: Nominal latent capacity. Usually measured in Watts (W, J/s).

ambient design dry bulb temperature
type: ObjectProperty
comment: Ambient design dry bulb temperature used for selecting the cooling tower. Usually measured in degrees Kelvin (K).

nominal part load ratio
type: ObjectProperty
comment: Allowable part load ratio range.

nominal return water temperature cooling
type: ObjectProperty
comment: Nominal return water temperature (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).

limiting terminal size
type: ObjectProperty
comment: The maximum terminal size capacity of the device. Usually measured in square metre (m2).

temperature classification
type: DatatypeProperty
comment: Enumeration defining the temperature classification of the space heater surface temperature. low temperature - surface temperature is relatively low, usually heated by hot water or electricity. high temperature - surface temperature is relatively high, usually heated by gas or steam.
range: string

Unitary control element
type: Class
comment: A unitary control element combines a number of control components into a single product, such as a thermostat or humidistat. A unitary control element provides a housing for an aggregation of control or electrical distribution elements that, in combination, perform a singular (unitary) purpose. Each item in the aggregation may have its own geometric representation and location.
subclass of: Distribution control device
had primary source: ifcunitarycontrolelement.htm
had primary source: pset unitarycontrolelementtypecommon.htm

storage type
type: DatatypeProperty
comment: Defines the general material category intended to be stored.
range: string

Tube bundle
type: Class
comment: A tube bundle is a device consisting of tubes and bundles of tubes used for heat transfer and contained typically within other energy conversion devices, such as a chiller or coil.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: thermal conductivity
subclass of: Restriction
  all values from: Measurement
  on property: staggered row spacing
subclass of: Restriction
  all values from: Measurement
  on property: nominal diameter
subclass of: Restriction
  all values from: Measurement
  on property: outside diameter
subclass of: Restriction
  all values from: boolean
  on property: has turbulator
subclass of: Restriction
  all values from: Measurement
  on property: in line row spacing
subclass of: Restriction
  all values from: Measurement
  on property: vertical spacing
subclass of: Restriction
  all values from: Measurement
  on property: length
subclass of: Restriction
  all values from: Measurement
  on property: volumen
subclass of: Restriction
  all values from: Measurement
  on property: inside diameter
subclass of: Restriction
  all values from: Measurement
  on property: horizontal spacing
subclass of: Restriction
  all values from: integer
  on property: number of circuits
subclass of: Restriction
  all values from: integer
  on property: number of rows
subclass of: Restriction
  all values from: Measurement
  on property: fouling factor
had primary source: ifctubebundle.htm
had primary source: pset tubebundletypecommon.htm

nominal pressure drop
type: ObjectProperty
comment: Total pressure drop across the filter. Usually measured in Pascals (Pa, N/m2).

Condenser
type: Class
comment: A condenser is a device that is used to dissipate heat, typically by condensing a substance such as a refrigerant from its gaseous to its liquid state.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: nominal heat transfer coefficient
subclass of: Restriction
  all values from: string
  on property: refrigerant class
subclass of: Restriction
  all values from: Measurement
  on property: internal refrigerant volume
subclass of: Restriction
  all values from: Measurement
  on property: internal surface area
subclass of: Restriction
  all values from: Measurement
  on property: external surface area
subclass of: Restriction
  all values from: Measurement
  on property: internal water volume
subclass of: Restriction
  all values from: Measurement
  on property: nominal heat transfer area
had primary source: ifccondenser.htm
had primary source: pset condensertypecommon.htm

nominal media surface velocity
type: ObjectProperty
comment: Average fluid velocity at the media surface. Usually measured in m/s.

SAREF extension for building devices
type: Ontology
description: This ontology extends the SAREF ontology for the building domain by defining building devices and how they are located in a building. This extension is based on the ISO 16739:2013 Industry Foundation Classes (IFC) standard for data sharing in the construction and facility management industries. The descriptions of the classes and properties extracted from IFC have been taken from the IFC documentation.
publisher: www.oeg-upm.net
creator: mpoveda
creator: me
license: cc-by4.0
preferred namespace prefix: s4bldg
preferred namespace uri: https://w3id.org/def/saref4bldg#
version IRI: saref4bldg
version info: 1.0

has turbulator
type: DatatypeProperty
comment: TRUE if the tube has a turbulator, FALSE if it does not.
range: boolean

spray type
type: DatatypeProperty
comment: SprayFilled: Water is sprayed into airflow. SplashTypeFill: water cascades over successive rows of splash bars. FilmTypeFill: water flows in a thin layer over closely spaced sheets.
range: string

internal water volume
type: ObjectProperty
comment: Internal volume of evaporator (water side). Usually measured in cubic metre (m3).

Actuator
type: Class
comment: A device responsible for moving or controlling a mechanism or system

primary apparent power
type: ObjectProperty
comment: The power in VA (volt ampere) that has been transformed and that runs into the transformer on the primary side. Usually measured in Watts (W, J/s).

size
type: ObjectProperty
comment: The size of the connection to the valve (or to each connection for faucets, mixing valves, etc.). Usually measured in millimeters (mm).

Flow moving device
type: Class
comment: The distribution flow element FlowMovingDevice defines the occurrence of an apparatus used to distribute, circulate or perform conveyance of fluids, including liquids and gases (such as a pump or fan), and typically participates in a flow distribution system.
subclass of: DistributionFlowDevice
had primary source: ifcflowmovingdevice.htm

Fan
type: Class
comment: A fan is a device which imparts mechanical work on a gas. A typical usage of a fan is to induce airflow in a building services air distribution system.
subclass of: Flow moving device
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: nominal power rate
subclass of: Restriction
  all values from: Measurement
  on property: operational riterial
subclass of: Restriction
  all values from: Measurement
  on property: nominal air flow rate
subclass of: Restriction
  all values from: Measurement
  on property: nominal rotation speed
subclass of: Restriction
  all values from: string
  on property: capacity control type
subclass of: Restriction
  all values from: Measurement
  on property: nominal static pressure
subclass of: Restriction
  all values from: string
  on property: motor drive type
subclass of: Restriction
  all values from: Measurement
  on property: nominal total pressure
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
had primary source: ifcfan.htm
had primary source: pset fantypecommon.htm

water inlet temperature range
type: ObjectProperty
comment: Allowable water inlet temperature range. Usually measured in degrees Kelvin (K).

lamp compensation type
type: DatatypeProperty
comment: Identifies the form of compensation used for power factor correction and radio suppression.
range: string

nominal particle geometric standard deviation
type: ObjectProperty
comment: Particle geometric standard deviation associated with nominal efficiency.

Physical object
type: Class
comment: Any Object that has a proper space region. (Definition extracted from DUL ontology)
subclass of: Spatial thing
subclass of: Restriction
  all values from: Physical object
  on property: contains
subclass of: Restriction
  all values from: Spatial thing
  on property: location
subclass of: Restriction
  all values from: Class
    union of: Building space
    union of: Physical object
  on property: is contained in

nominal supply water temperature heating
type: ObjectProperty
comment: Nominal supply water temperature (refers to nominal heating capacity). Usually measured in degrees Kelvin (K).

standard
type: DatatypeProperty
comment: The designation of the standard applicable for the definition of the characteristics of the unit.
range: string

Unit of measure
type: Class
comment: The unit of measure is a standard for measurement of a quantity, such as a Property. For example, Power is a property and Watt is a unit of power that represents a definite predetermined power: when we say 10 Watt, we actually mean 10 times the definite predetermined power called "watt". Our definition is based on the definition of unit of measure in the Ontology of units of Measure (OM). We propose here a list of some units of measure that are relevant for the purpose of the Smart Appliances ontology, but this list can be extended.

nominal capacity
type: ObjectProperty
comment: Nominal capacity. Usually measured in Watts (W, J/s).

Alarm
type: Class
comment: An alarm is a device that signals the existence of a condition or situation that is outside the boundaries of normal expectation or that activates such a device. Alarms include the provision of break glass buttons and manual pull boxes that are used to activate alarms.
subclass of: Distribution control device
had primary source: ifcalarm.htm
had primary source: pset alarmtypecommon.htm

Fire suppression terminal
type: Class
comment: A fire suppression terminal has the purpose of delivering a fluid (gas or liquid) that will suppress a fire. A fire suppression terminal provides for all forms of sprinkler, spreader and other form of terminal that is connected to a pipework system and intended to act in the role of suppressing a fire.
subclass of: Flow terminal
had primary source: pset firesuppressionterminaltypecommon.htm
had primary source: ifcfiresuppressionterminal.htm

Electric generator
type: Class
comment: An electric generator is an engine that is a machine for converting mechanical energy into electrical energy.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: electric generator efficiency
subclass of: Restriction
  all values from: Measurement
  on property: maximum power output
subclass of: Restriction
  all values from: Measurement
  on property: start current factor
had primary source: ifcelectricgenerator.htm
had primary source: pset electricgeneratortypecommon.htm

weight
type: ObjectProperty
comment: The weight of the device. Usually measured in kilograms (kg) or grams (g).

Damper
type: Class
comment: A damper typically participates in an HVAC duct distribution system and is used to control or modulate the flow of air.
subclass of: Flow controller
subclass of: Restriction
  all values from: integer
  on property: number of blades
subclass of: Restriction
  all values from: string
  on property: operation
subclass of: Restriction
  all values from: Measurement
  on property: close off rating
subclass of: Restriction
  all values from: string
  on property: blade shape
subclass of: Restriction
  all values from: string
  on property: frame type
subclass of: Restriction
  all values from: Measurement
  on property: face area
subclass of: Restriction
  all values from: Measurement
  on property: frame depth
subclass of: Restriction
  all values from: Measurement
  on property: air flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: leakage fully closed
subclass of: Restriction
  all values from: Measurement
  on property: frame thickness
subclass of: Restriction
  all values from: Measurement
  on property: open pressure drop
subclass of: Restriction
  all values from: Measurement
  on property: nominal air flow rate
subclass of: Restriction
  all values from: string
  on property: blade action
subclass of: Restriction
  all values from: Measurement
  on property: maximum working pressure
subclass of: Restriction
  all values from: Measurement
  on property: temperature rating
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: string
  on property: blade edge
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: blade thickness
subclass of: Restriction
  all values from: string
  on property: orientation
had primary source: pset dampertypecommon.htm
had primary source: ifcdamper.htm

transformer vector group
type: DatatypeProperty
comment: List of the possible vector groups for the transformer from which that required may be set. Values in the enumeration list follow a standard international code where the first letter describes how the primary windings are connected, the second letter describes how the secondary windings are connected, and the numbers describe the rotation of voltages and currents from the primary to the secondary side in multiples of 30 degrees. D: means that the windings are delta-connected. Y: means that the windings are star-connected. Z: means that the windings are zig-zag connected (a special start-connected providing low reactance of the transformer). The connectivity is only relevant for three-phase transformers.
range: string

isolator static deflection
type: ObjectProperty
comment: Static deflection of the vibration isolator. Usually measured in millimeters (mm).

Flow terminal
type: Class
comment: The distribution flow element FlowTerminal defines the occurrence of a permanently attached element that acts as a terminus or beginning of a distribution system (such as an air outlet, drain, water closet, or sink). A terminal is typically a point at which a system interfaces with an external environment.
subclass of: DistributionFlowDevice
had primary source: ifcflowterminal.htm

Building device
type: Class
comment: A tangible object designed to accomplish a particular task in a building.
subclass of: Device
subclass of: Building object

color temperature
type: ObjectProperty
comment: The color temperature of any source of radiation is defined as the temperature (in Kelvin) of a black-body or Planckian radiator whose radiation has the same chromaticity as the source of radiation. Often the values are only approximate color temperatures as the black-body radiator cannot emit radiation of every chromaticity value. The color temperatures of the commonest artificial light sources range from less than 3000K (warm white) to 4000K (intermediate) and over 5000K (daylight). Usually measured in degrees Kelvin (K).

net positive suction head
type: ObjectProperty
comment: Minimum liquid pressure at the pump inlet to prevent cavitation. Usually measured in Pascals (Pa, N/m2).

nominal supply voltage
type: ObjectProperty
comment: The nominal voltage of the supply. Usually measured in Volts (V, W/A).

number of circuits
type: DatatypeProperty
comment: Number of parallel fluid tube circuits.
range: integer

blade edge
type: DatatypeProperty
comment: Blade edge.
range: string

vertical spacing
type: ObjectProperty
comment: Vertical spacing between tubes in the tube bundle.Usually measured in millimeters (mm).

fouling factor
type: ObjectProperty
comment: Fouling factor of the tubes in the tube bundle. Usually measured in m2 Kelvin/Watt.

pipe connection enum
type: DatatypeProperty
comment: The manner in which the pipe connection is made to the cooled beam.
range: string

refrigerant class
type: DatatypeProperty
comment: Refrigerant class used by the compressor. CFC: Chlorofluorocarbons. HCFC: Hydrochlorofluorocarbons. HFC: Hydrofluorocarbons.
range: string

nominal diameter
type: ObjectProperty
comment: Nominal diameter or width of the tubes in the tube bundle. Usually measured in millimeters (mm).

location
type: ObjectProperty
comment: The relation between something and the point, or other geometrical thing in space, where it is. For example, the realtionship between a radio tower and a Point with a given lat and long. Or a relationship between a park and its outline as a closed arc of points, or a road and its location as a arc (a sequence of points). Clearly in practice there will be limit to the accuracy of any such statement, but one would expect an accuracy appropriate for the size of the object and uses such as mapping .

nominal supply voltage offset
type: ObjectProperty
comment: The maximum and minimum allowed voltage of the supply e.g. boundaries of 380V/440V may be applied for a nominal voltage of 400V.

operational riterial
type: ObjectProperty
comment: Time of operation at maximum operational ambient air temperature. Measured in seconds (s) or days (d) or other units of time.

access type
type: DatatypeProperty
comment: Defines the types of access (or cover) to a tank that may be specified. Note that covers are generally specified for rectangular tanks. For cylindrical tanks, access will normally be via a manhole.
range: string

second curvature radius
type: ObjectProperty
comment: SecondCurvatureRadius should be defined as the top or right side radius of curvature value. Usually measured in millimeters (mm).

application
type: DatatypeProperty
comment: Humidifier application. Fixed: Humidifier installed in a ducted flow distribution system. Portable: Humidifier is not installed in a ducted flow distribution system.
range: string

maximum spectrum
type: ObjectProperty
comment: The spectrum of radiation describes its composition with regard to wavelength. Light, for example, as the portion of electromagnetic radiation that is visible to the human eye, is radiation with wavelengths in the range of approx. 380 to 780 nm (1 nm = 10 m). The corresponding range of colours varies from violet to indigo, blue, green, yellow, orange, and red. These colours form a continuous spectrum, in which the various spectral sectors merge into each other.

end shape type
type: DatatypeProperty
comment: Defines the types of end shapes that can be used for preformed tanks. The convention for reading these enumerated values is that for a vertical cylinder, the first value is the base and the second is the top for a horizontal cylinder, the order of reading should be left to right. For a speherical tank, the value UNSET should be used.B5
range: string

nominal supply water temperature cooling
type: ObjectProperty
comment: Nominal supply water temperature (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).

color rendering index
type: DatatypeProperty
comment: The CRI indicates how well a light source renders eight standard colors compared to perfect reference lamp with the same color temperature. The CRI scale ranges from 1 to 100, with 100 representing perfect rendering properties.
range: integer

horizontal spacing
type: ObjectProperty
comment: Horizontal spacing between tubes in the tube bundle. Usually measured in millimeters (mm).

Energy conversion device
type: Class
comment: The distribution flow element EnergyConversionDevice defines the occurrence of a device used to perform energy conversion or heat transfer and typically participates in a flow distribution system.
subclass of: DistributionFlowDevice
had primary source: ifcenergyconversiondevice.htm

flow instrument
type: Class
comment: A flow instrument reads and displays the value of a particular property of a system at a point, or displays the difference in the value of a property between two points. Instrumentation is typically for the purpose of determining the value of the property at a point in time. It is not the purpose of an instrument to record or integrate the values over time (although they may be connected to recording devices that do perform such a function). This entity provides for all forms of mechanical flow instrument (thermometers, pressure gauges etc.) and electrical flow instruments (ammeters, voltmeters etc.)
subclass of: Distribution control device
had primary source: ifcflowinstrument.htm
had primary source: pset flowinstrumenttypecommon.htm

thermal mass heat capacity
type: ObjectProperty
comment: Product of component mass and specific heat.

working pressure
type: ObjectProperty
comment: The normally expected maximum working pressure of the valve. Usually measured in Pascals (Pa, N/m2).

Building
type: Class
comment: A building represents a structure that provides shelter for its occupants or contents and stands in one place. The building is also used to provide a basic element within the spatial structure hierarchy for the components of a building project (together with site, storey, and space).
subclass of: Spatial thing
subclass of: Restriction
  all values from: Spatial thing
  on property: location
subclass of: Restriction
  all values from: Building space
  on property: has space
had primary source: ifcbuilding.htm

primary air flow rate range
type: ObjectProperty
comment: Minimum primary airflow that can be delivered. Usually measured in m3/s.

temperature rating
type: ObjectProperty
comment: Temperature rating. Usually measured in degrees Kelvin (K).

has part winding
type: DatatypeProperty
comment: Indication of whether the motor is single speed, i.e. has a single winding (= FALSE) or multi-speed i.e.has part winding (= TRUE) .
range: boolean

blade action
type: DatatypeProperty
comment: Blade action.
range: string

external surface area
type: ObjectProperty
comment: External surface area (both primary and secondary area). Usually measured in square metre (m2).

leakage fully closed
type: ObjectProperty
comment: Leakage when fully closed. Usually measured in m3/s.

nomminal rotation speed
type: ObjectProperty
comment: Pump rotational speed under nominal conditions. Usually measured in cycles/s.

capacity people
type: DatatypeProperty
comment: Capacity of the transportation element measured in numbers of person.
range: nonNegativeInteger

output capacity
type: ObjectProperty
comment: Total nominal heat output as listed by the manufacturer. Usually measured in Watts (W, J/s).

initial resistance
type: ObjectProperty
comment: Initial new filter fluid resistance (i.e., pressure drop at the maximum air flowrate across the filter when the filter is new per ASHRAE Standard 52.1). Usually measured in Pascals (Pa, N/m2).

water requirement
type: ObjectProperty
comment: Make-up water requirement. Usually measured in m3/s.

nominal moisture gain
type: ObjectProperty
comment: Nominal rate of water vapor added into the airstream. Usually measured in kg/s.

Protective device tripping unit
type: Class
comment: A protective device tripping unit breaks an electrical circuit at a separate breaking unit when a stated electric current that passes through the unit is exceeded.
subclass of: Distribution control device
subclass of: Restriction
  all values from: string
  on property: standard
subclass of: Restriction
  all values from: Measurement
  on property: limiting terminal size
had primary source: pset protectivedevicetrippingunittypecommon.htm
had primary source: ifcprotectivedevicetrippingunit.htm

Distribution control device
type: Class
comment: Represents devices of a building automation control system that are used to impart control over elements of a distribution system. (Definition adapated from http://www.buildingsmart-tech.org/ifc/IFC4/Add1/html/schema/ifcsharedbldgserviceelements/lexical/ifcdistributioncontrolelement.htm)
subclass of: Distribution device

evaporation medium type
type: DatatypeProperty
comment: ColdLiquid: Evaporator is using liquid type of fluid to exchange heat with refrigerant. ColdAir: Evaporator is using air to exchange heat with refrigerant.
range: string

nominal ua
type: ObjectProperty
comment: Nominal UA value.

basin reserve volume
type: ObjectProperty
comment: Volume between operating and overflow levels in cooling tower basin. Usually measured in cubic metre (m3).

maximum apparent power
type: ObjectProperty
comment: Maximum apparent power/capacity in VA (volt ampere). Usually measured in Watts (W, J/s).

ambient design wet bulb temperature
type: ObjectProperty
comment: Ambient design wet bulb temperature used for selecting the cooling tower. Usually measured in degrees Kelvin (K).

maximum power output
type: ObjectProperty
comment: The maximum output power rating of the engine. Usually measured in Watts (W, J/s).

capacity weight
type: ObjectProperty
comment: Capacity of the transport element measured by weight. Usually measured in kilograms (kg) or grams (g).

te time
type: ObjectProperty
comment: The maximum time (in s) at which the motor could run with locked rotor when the motor is used in an EX-environment. The time indicates that a protective device should trip before this time when the starting current of the motor is slowing through the device.

operation temperature range
type: ObjectProperty
comment: Allowable operation ambient (air, fluid) temperature range. Usually measured in degrees Kelvin (K).

nominal condensing temperature
type: ObjectProperty
comment: Chiller condensing temperature. Usually measured in degrees Kelvin (K).

evaporation coolant
type: DatatypeProperty
comment: The fluid used for the coolant in the evaporator.
range: string

number of cells
type: DatatypeProperty
comment: Number of cells in one cooling tower unit.
range: integer

ideal shaft power
type: ObjectProperty
comment: Compressor shaft power under ideal conditions. Usually measured in Watts (W, J/s).

nominal total pressure
type: ObjectProperty
comment: Nominal total pressure rise across the fan. Usually measured in Pascals (Pa, N/m2).

secondary air flow rate range
type: ObjectProperty
comment: Maximum secondary airflow that can be delivered. Usually measured in Pascals (Pa, N/m2).

is neutral secondary terminal available
type: DatatypeProperty
comment: An indication of whether the neutral point of the secondary winding is available as a terminal (=TRUE) or not (= FALSE).
range: boolean

is measured in
type: ObjectProperty
comment: A relation between a measurement and the unit of measure in which the measurement value is expressed.

blade thickness
type: ObjectProperty
comment: The thickness of the damper blade. Usually measured in millimeters (mm).

Burner
type: Class
comment: A burner is a device that converts fuel into heat through combustion. It includes gas, oil, and wood burners.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: string
  on property: energy source
had primary source: ifcburner.htm
had primary source: pset burnertypecommon.htm

nominal frequency
type: ObjectProperty
comment: The nominal frequency of the supply. Usually measured in cycles/s or Hertz (Hz).

nominal flow rate
type: ObjectProperty
comment: Nominal fluid flow rate through the filter. Usually measured in m3/s.

nominal filter face velocity
type: ObjectProperty
comment: Filter face velocity. Usually measured in m/s.

lamp maintenance factor
type: ObjectProperty
comment: Non recoverable losses of luminous flux of a lamp due to lamp depreciation i.e. the decreasing of light output of a luminaire due to aging and dirt.

internal refrigerant volume
type: ObjectProperty
comment: Internal volume of evaporator (refrigerant side). Usually measured in cubic metre (m3).

has exterior insulation
type: DatatypeProperty
comment: TRUE if the silencer has exterior insulation. FALSE if it does not.
range: boolean

start current factor
type: ObjectProperty
comment: IEC. Start current factor defines how large the peek starting current will become on the engine. StartCurrentFactor is multiplied to NominalCurrent and we get the start current.

secondary current
type: ObjectProperty
comment: The current that has been transformed and is running out of the transformer on the secondary side. Usually measured in Ampere (A).

remote reading
type: DatatypeProperty
comment: Indicates whether the meter has a connection for remote reading through connection of a communication device (set TRUE) or not (set FALSE).
range: boolean

close off rating
type: ObjectProperty
comment: Close off rating. Usually measured in Pascals (Pa, N/m2).

imaginary impedance ratio
type: ObjectProperty
comment: The ratio between the imaginary part of the zero sequence impedance and the imaginary part of the positive impedance (i.e. imaginary part of the short-circuit voltage) of the transformer. Used for three-phase transformer which includes a N-conductor.

coil length
type: ObjectProperty
comment: Length of coil. Usually measured in millimeters (mm).

in line row spacing
type: ObjectProperty
comment: In-line tube row spacing. Usually measured in millimeters (mm).

nominal return water temperature heating
type: ObjectProperty
comment: Nominal return water temperature (refers to nominal heating capacity). Usually measured in degrees Kelvin (K).

has defrost
type: DatatypeProperty
comment: Whether the heat exchanger has defrost function or not.
range: boolean

Building space
type: Class
comment: An entity used to define the physical spaces of the building. A building space contains devices or building objects.
subclass of: Spatial thing
subclass of: Restriction
  all values from: Building space
  on property: has space
subclass of: Restriction
  all values from: Class
    union of: Building
    union of: Building space
  on property: isSpaceOf
subclass of: Restriction
  all values from: Physical object
  on property: contains

has space
type: TransitiveProperty
type: ObjectProperty
comment: Relation between a building or a building space and the spaces it can be divided into.
inverse of: isSpaceOf

color appearance
type: DatatypeProperty
comment: In both the DIN and CIE standards, artificial light sources are classified in terms of their color appearance. To the human eye they all appear to be white the difference can only be detected by direct comparison. Visual performance is not directly affected by differences in color appearance.
range: string

nominal heat transfer area
type: ObjectProperty
comment: Nominal heat transfer surface area associated with nominal overall heat transfer coefficient. Usually measured in square metre (m2).

relates to property
type: ObjectProperty
comment: A relation between a measurement and the property such measurement is about.

Heat exchanger
type: Class
comment: A heat exchanger is a device used to provide heat transfer between non-mixing media such as plate and shell and tube heat exchangers. HeatExchanger is commonly used on water-side distribution systems to recover energy from a liquid to another liquid (typically water-based), whereas AirToAirHeatRecovery is commonly used on air-side distribution systems to recover energy from a gas to a gas (usually air).
subclass of: Energy conversion device
subclass of: Restriction
  all values from: string
  on property: arrangement
had primary source: ifcheatexchanger.htm
had primary source: pset heatexchangertypecommon.htm

Cooled beam
type: Class
comment: A cooled beam (or chilled beam) is a device typically used to cool air by circulating a fluid such as chilled water through exposed finned tubes above a space. Typically mounted overhead near or within a ceiling, the cooled beam uses convection to cool the space below it by acting as a heat sink for the naturally rising warm air of the space. Once cooled, the air naturally drops back to the floor where the cycle begins again.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: nominal supply water temperature heating
subclass of: Restriction
  all values from: Measurement
  on property: water pressure range
subclass of: Restriction
  all values from: string
  on property: finish color
subclass of: Restriction
  all values from: Measurement
  on property: coil width
subclass of: Restriction
  all values from: Measurement
  on property: nominal sorrounding temperature heating
subclass of: Restriction
  all values from: Measurement
  on property: water pressure range
subclass of: Restriction
  all values from: Measurement
  on property: coil length
subclass of: Restriction
  all values from: Measurement
  on property: nominal supply water temperature cooling
subclass of: Restriction
  all values from: Measurement
  on property: nominal sorrounding humidity cooling
subclass of: Restriction
  all values from: Measurement
  on property: nominal return water temperature heating
subclass of: Restriction
  all values from: Measurement
  on property: nominal return water temperature cooling
subclass of: Restriction
  all values from: Measurement
  on property: nominal cooling capacity
subclass of: Restriction
  all values from: Measurement
  on property: nominal sorrounding temperature cooling
subclass of: Restriction
  all values from: string
  on property: water flow control system type
subclass of: Restriction
  all values from: boolean
  on property: is free hanging
subclass of: Restriction
  all values from: Measurement
  on property: nominal heating capacity
subclass of: Restriction
  all values from: string
  on property: integrated lighting type
subclass of: Restriction
  all values from: Measurement
  on property: nominal water flow heating
subclass of: Restriction
  all values from: string
  on property: pipe connection enum
subclass of: Restriction
  all values from: Measurement
  on property: nominal water flow cooling
had primary source: pset cooledbeamtypecommon.htm
had primary source: ifccooledbeam.htm

electric motor efficiency
type: ObjectProperty
comment: The ratio of output capacity to intake capacity.

nominal heating capacity
type: ObjectProperty
comment: Nominal heating capacity. Usually measured in Watts (W, J/s).

operating mode
type: DatatypeProperty
comment: Identifies the operating mode of the boiler.
range: string

flow resistance range
type: ObjectProperty
comment: Allowable range of frictional resistance against which the fluid is being pumped. Usually measured in Pascals (Pa, N/m2).

nominal water flow cooling
type: ObjectProperty
comment: Nominal water flow (refers to nominal cooling capacity). Usually measured in m3/s.

nominal heat rejection rate
type: ObjectProperty
comment: Sum of the refrigeration effect and the heat equivalent of the power input to the compressor. Usually measured in Watts (W, J/s).

heat transfer medium
type: DatatypeProperty
comment: Enumeration defining the heat transfer medium if applicable.
range: string

impeller diameter
type: ObjectProperty
comment: Diameter of compressor impeller - used to scale performance of geometrically similar compressors. Usually measured in millimeters (mm).

Boiler
type: Class
comment: A boiler is a closed, pressure-rated vessel in which water or other fluid is heated using an energy source such as natural gas, heating oil, or electricity. The fluid in the vessel is then circulated out of the boiler for use in various processes or heating applications.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: nominal energy consumption
subclass of: Restriction
  all values from: Measurement
  on property: water inlet temperature range
subclass of: Restriction
  all values from: string
  on property: operating mode
subclass of: Restriction
  all values from: Measurement
  on property: pressure rating
subclass of: Restriction
  all values from: Measurement
  on property: nominal part load ratio
subclass of: Restriction
  all values from: boolean
  on property: is water storage heater
subclass of: Restriction
  all values from: Measurement
  on property: outlet temperature range
subclass of: Restriction
  all values from: Measurement
  on property: water storage capacity
subclass of: Restriction
  all values from: Measurement
  on property: heat transfer surface area
subclass of: Restriction
  all values from: Measurement
  on property: water inlet temperature range
subclass of: Restriction
  all values from: Measurement
  on property: outlet temperature range
subclass of: Restriction
  all values from: string
  on property: energy source
had primary source: pset boilertypecommon.htm
had primary source: ifcboiler.htm

number of rows
type: DatatypeProperty
comment: Number of tube rows in the tube bundle assembly.
range: integer

Outlet
type: Class
comment: An outlet is a device installed at a point to receive one or more inserted plugs for electrical power or communications. Power outlets are commonly connected within a junction box; data outlets may be directly connected to a wall. For power outlets sharing the same circuit within a junction box, the ports should indicate the logical wiring relationship to the enclosing junction box, even though they may be physically connected to a cable going to another outlet, switch, or fixture.
subclass of: Flow terminal
subclass of: Restriction
  all values from: integer
  on property: number os sockets
subclass of: Restriction
  all values from: boolean
  on property: is pluggable outlet
had primary source: ifcoutlet.htm
had primary source: pset outlettypecommon.htm

audio volume
type: ObjectProperty
comment: Indicates discrete audio volume levels and corresponding sound power offsets, if applicable. Missing values may be interpolated. Measured in watts.

Building object
type: Class
comment: An object in the building that can be controlled by devices, such as a door or a window that can be automatically opened or closed by an actuator. (Definition taken from SAREF 1.0)
subclass of: Physical object

minimum spectrum
type: ObjectProperty
comment: The spectrum of radiation describes its composition with regard to wavelength. Light, for example, as the portion of electromagnetic radiation that is visible to the human eye, is radiation with wavelengths in the range of approx. 380 to 780 nm (1 nm = 10 m). The corresponding range of colours varies from violet to indigo, blue, green, yellow, orange, and red. These colours form a continuous spectrum, in which the various spectral sectors merge into each other.

primary air flow rate range
type: ObjectProperty
comment: Maximum primary airflow that can be delivered. Usually measured in m3/s.

nominal body length
type: ObjectProperty
comment: Nominal or quoted length, measured along the x-axis of the local coordinate system of the object, of the body of the object. Usually measured in millimeters (mm).

Filter
type: Class
comment: A filter is an apparatus used to remove particulate or gaseous matter from fluids and gases.
subclass of: Flow treatment device
subclass of: Restriction
  all values from: Measurement
  on property: fluid flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: initial resistance
subclass of: Restriction
  all values from: Measurement
  on property: final resistance
subclass of: Restriction
  all values from: Measurement
  on property: nominal particle geometric mean diameter
subclass of: Restriction
  all values from: Measurement
  on property: fluid flow rate range
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: weight
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: nominal media surface velocity
subclass of: Restriction
  all values from: Measurement
  on property: nominal flow rate
subclass of: Restriction
  all values from: Measurement
  on property: nominal pressure drop
subclass of: Restriction
  all values from: Measurement
  on property: nominal particle geometric standard deviation
subclass of: Restriction
  all values from: Measurement
  on property: nominal filter face velocity
had primary source: ifcfilter.htm
had primary source: pset filtertypecommon.htm

Chiller
type: Class
comment: A chiller is a device used to remove heat from a liquid via a vapor-compression or absorption refrigeration cycle to cool a fluid, typically water or a mixture of water and glycol. The chilled fluid is then used to cool and dehumidify air in a building.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: Measurement
  on property: nominal power consumption
subclass of: Restriction
  all values from: Measurement
  on property: nominal capacity
subclass of: Restriction
  all values from: Measurement
  on property: nominal evaporating temmperature
subclass of: Restriction
  all values from: Measurement
  on property: nominal efficiency
subclass of: Restriction
  all values from: Measurement
  on property: nominal heat rejection rate
subclass of: Restriction
  all values from: Measurement
  on property: nominal condensing temperature
had primary source: ifcchiller.htm
had primary source: pset chillertypecommon.htm

Electric flow storage device
type: Class
comment: An electric flow storage device is a device in which electrical energy is stored and from which energy may be progressively released.
subclass of: Flow storage device
subclass of: Restriction
  all values from: Measurement
  on property: nominal supply voltage
subclass of: Restriction
  all values from: Measurement
  on property: nominal frequency
subclass of: Restriction
  all values from: Measurement
  on property: nominal supply voltage offset
had primary source: pset electricflowstoragedevicetypecommon.htm
had primary source: ifcelectricflowstoragedevice.htm

maximum working pressure
type: ObjectProperty
comment: Maximum working pressure. Usually measured in Pascals (Pa, N/m2).

frame size
type: DatatypeProperty
comment: Designation of the frame size according to the named range of frame sizes designated at the place of use or according to a given standard.
range: string

pressure rating
type: ObjectProperty
comment: Nominal pressure rating of the boiler as rated by the agency having jurisdiction. Usually measured in Pascals (Pa, N/m2).

motor enclosure type
type: DatatypeProperty
comment: A list of the available types of motor enclosure from which that required may be selected.
range: string

water flow control system type
type: DatatypeProperty
comment: Factory fitted waterflow control system.
range: string

air flow rate range
type: ObjectProperty
comment: Maximum allowable air flow rate. Usually measured in m3/s.

nominal heat transfer coefficient
type: ObjectProperty
comment: Nominal overall heat transfer coefficient associated with nominal heat transfer area. Usually measured in Watts/m2 Kelvin.

volumen
type: ObjectProperty
comment: Total volume of fluid in the tubes and their headers. Usually measured in cubic metre (m3).

electric generator efficiency
type: ObjectProperty
comment: The ratio of output capacity to intake capacity.

cover length
type: ObjectProperty
comment: The length measured along the x-axis in the local coordinate system or the radius (in the case of a circular shape in plan) of the cover of the oil interceptor. Usually measured in millimeters (mm).

contributed luminous flux
type: ObjectProperty
comment: Luminous flux is a photometric measure of radiant flux, i.e. the volume of light emitted from a light source. Luminous flux is measured either for the interior as a whole or for a part of the interior (partial luminous flux for a solid angle). All other photometric parameters are derivatives of luminous flux. Luminous flux is measured in lumens (lm). The luminous flux is given as a nominal value for each lamp. Usually measured in Lumen (lm, Candela Steradian).

internal surface area
type: ObjectProperty
comment: Internal surface area. Usually measured in square metre (m2).

read out type
type: DatatypeProperty
comment: Indication of the form that readout from the meter takes. In the case of a dial read out, this may comprise multiple dials that give a cumulative reading and/or a mechanical odometer.
range: string

solar device
type: Class
comment: A solar device converts solar radiation into other energy such as electric current or thermal energy.
subclass of: Energy conversion device
had primary source: pset solardevicetypecommon.htm
had primary source: ifcsolardevicetypeenum.htm

Sanitary terminal
type: Class
comment: A sanitary terminal is a fixed appliance or terminal usually supplied with water and used for drinking, cleaning or foul water disposal or that is an item of equipment directly used with such an appliance or terminal.
subclass of: Flow terminal
had primary source: pset sanitaryterminaltypecommon.htm
had primary source: ifcsanitaryterminal.htm

ventilating pipe size
type: ObjectProperty
comment: Size of the ventilating pipe(s). Usually measured in millimeters (mm).

secondary air flow rate range
type: ObjectProperty
comment: Maximum secondary airflow that can be delivered. Usually measured in Pascals (Pa, N/m2).

power source
type: DatatypeProperty
comment: Type of power driving the compressor.
range: string

number os sockets
type: DatatypeProperty
comment: The number of sockets that may be connected. In case of inconsistency, sockets defined on ports take precedence.
range: integer

Valve
type: Class
comment: A valve is used in a building services piping distribution system to control or modulate the flow of the fluid.
subclass of: Flow controller
subclass of: Restriction
  all values from: Measurement
  on property: test pressure
subclass of: Restriction
  all values from: Measurement
  on property: working pressure
subclass of: Restriction
  all values from: string
  on property: valve pattern
subclass of: Restriction
  all values from: string
  on property: valve mechanism
subclass of: Restriction
  all values from: Measurement
  on property: close off rating
subclass of: Restriction
  all values from: string
  on property: valve operation
subclass of: Restriction
  all values from: Measurement
  on property: flow coefficient
subclass of: Restriction
  all values from: Measurement
  on property: size
had primary source: ifcvalve.htm
had primary source: pset valvetypecommon.htm

inlet connection size
type: ObjectProperty
comment: Size of the inlet connection. Usually measured in millimeters (mm).

shading device type
type: DatatypeProperty
comment: Specifies the type of shading device.
range: string

maximum part load ratio
type: ObjectProperty
comment: Maximum part load ratio as a fraction of nominal capacity.

effective capacity
type: ObjectProperty
comment: The total effective or actual volumetric capacity of the tank. Usually measured in cubic metre (m3).B3

maximum supported weight
type: ObjectProperty
comment: The maximum weight that can be carried by the vibration isolator. Usually measured in kilograms (kg) or grams (g).

switch function
type: DatatypeProperty
comment: Indicates types of switches which differs in functionality.
range: string

DistributionFlowDevice
type: Class
comment: Represents devices of a distribution system that facilitate the distribution of energy or matter, such as air, water or power. (Definition adapated from http://www.buildingsmart-tech.org/ifc/IFC4/Add1/html/schema/ifcsharedbldgserviceelements/lexical/ifcdistributionflowelement.htm)
subclass of: Distribution device

number of panels
type: DatatypeProperty
comment: Number of panels.
range: integer

secondary voltage
type: ObjectProperty
comment: The voltage that has been transformed and is running out of the transformer on the secondary side. Usually measured in Volts (V, W/A).

vibration transmissibility
type: ObjectProperty
comment: The vibration transmissibility percentage.

nominal particle geometric mean diameter
type: ObjectProperty
comment: Particle geometric mean diameter associated with nominal efficiency. Usually measured in millimeters (mm).

thermal conductivity
type: ObjectProperty
comment: Fouling factor of the tubes in the tube bundle. Usually measured in m2 Kelvin/Watt.

operation temperature range
type: ObjectProperty
comment: Allowable operation ambient (air, fluid) temperature range. Usually measured in degrees Kelvin (K).

Cooling tower
type: Class
comment: A cooling tower is a device which rejects heat to ambient air by circulating a fluid such as water through it to reduce its temperature by partial evaporation.
subclass of: Energy conversion device
subclass of: Restriction
  all values from: string
  on property: capacity control
subclass of: Restriction
  all values from: string
  on property: control strategy
subclass of: Restriction
  all values from: string
  on property: spray type
subclass of: Restriction
  all values from: string
  on property: circuit type
subclass of: Restriction
  all values from: integer
  on property: number of cells
subclass of: Restriction
  all values from: string
  on property: flow arrangement
subclass of: Restriction
  all values from: Measurement
  on property: ambient design dry bulb temperature
subclass of: Restriction
  all values from: Measurement
  on property: ambient design wet bulb temperature
subclass of: Restriction
  all values from: Measurement
  on property: nominal capacity
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
subclass of: Restriction
  all values from: Measurement
  on property: lift elevation difference
subclass of: Restriction
  all values from: Measurement
  on property: basin reserve volume
subclass of: Restriction
  all values from: Measurement
  on property: water requirement
subclass of: Restriction
  all values from: Measurement
  on property: operation temperature range
had primary source: ifccoolingtower.htm
had primary source: pset coolingtowertypecommon.htm

heat transfer dimension
type: DatatypeProperty
comment: Indicates how heat is transmitted according to the shape of the space heater.
range: string

primary current
type: ObjectProperty
comment: The current that is going to be transformed and that runs into the transformer on the primary side. Usually measured in Ampere (A).

is free hanging
type: DatatypeProperty
comment: Is it free hanging type (not mounted in a false ceiling)?
range: boolean

secondary current type
type: DatatypeProperty
comment: A list of the secondary current types that can result from transformer output.
range: string

staggered row spacing
type: ObjectProperty
comment: Staggered tube row spacing. Usually measured in millimeters (mm).

isSpaceOf
type: TransitiveProperty
type: ObjectProperty
comment: Relation between a building space and the building or building space it belongs to.

short circuit voltage
type: ObjectProperty
comment: A complex number that specifies the real and imaginary parts of the short-circuit voltage at rated current of a transformer given in %.

is pluggable outlet
type: DatatypeProperty
comment: Indication of whether the outlet accepts a loose plug connection (= TRUE) or whether it is directly connected (= FALSE) or whether the form of connection has not yet been determined (= UNKNOWN).
range: boolean

lamp ballast type
type: DatatypeProperty
comment: The type of ballast used to stabilise gas discharge by limiting the current during operation and to deliver the necessary striking voltage for starting. Ballasts are needed to operate Discharge Lamps such as Fluorescent, Compact Fluorescent, High-pressure Mercury, Metal Halide and High-pressure Sodium Lamps. Magnetic ballasts are chokes which limit the current passing through a lamp connected in series on the principle of self-induction. The resultant current and power are decisive for the efficient operation of the lamp. A specially designed ballast is required for every type of lamp to comply with lamp rating in terms of Luminous Flux, Color Appearance and service life. The two types of magnetic ballasts for fluorescent lamps are KVG Conventional (EC-A series) and VVG Low-loss ballasts (EC-B series). Low-loss ballasts have a higher efficiency, which means reduced ballast losses and a lower thermal load. Electronic ballasts are used to run fluorescent lamps at high frequencies (approx. 35 - 40 kHz).
range: string

primary voltage
type: ObjectProperty
comment: The voltage that is going to be transformed and that runs into the transformer on the primary side. Usually measured in Volts (V, W/A).

Spatial thing
type: Class
comment: Anything with spatial extent, i.e. size, shape, or position. e.g. people, places, bowling balls, as well as abstract areas like cubes.
disjoint with: Measurement
disjoint with: Unit of measure
disjoint with: Property

is neutral primary terminal available
type: DatatypeProperty
comment: An indication of whether the neutral point of the primary winding is available as a terminal (=TRUE) or not (= FALSE).
range: boolean

sensor
type: Class
comment: A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument.
subclass of: Distribution control device
subclass of: Sensor
had primary source: ifcsensor.htm
had primary source: pset sensortypecommon.htm

ideal capacity
type: ObjectProperty
comment: Compressor capacity under ideal conditions. Usually measured in Watts (W, J/s).

thermal transmittance
type: ObjectProperty
comment: Rate at which energy is transmitted through a body. Usually measured in Watts/m2 Kelvin.

flow resistance range
type: ObjectProperty
comment: Allowable range of frictional resistance against which the fluid is being pumped. Usually measured in Pascals (Pa, N/m2).

operating wight
type: ObjectProperty
comment: Operating weight of the tank including all of its contents. Usually measured in kilograms (kg) or grams (g).

Property
type: Class
comment: An aspect of an entity that can be observable by a sensor.
disjoint with: Unit of measure

is illuminated
type: DatatypeProperty
comment: An indication of whether there is an illuminated indicator to show that the switch is on (=TRUE) or not (= FALSE).
range: boolean