IFC (IFC4X3_ADD2) under development Pset_AirTerminalTypeCommon Semantic definition

Air terminal type common attributes. SoundLevel attribute deleted in IFC2x2 Pset Addendum: Use IfcSoundProperties instead. Applicable entities Properties

Name Property Type Data Type Description
Reference IfcPropertySingleValue IfcIdentifier

Reference ID for this specified type in this project (e.g. type 'A-1'), Also referred to as "construction type". It should be provided as an alternative to the name of the "object type", if the software does not support object types and no classification reference to a recognized classification system used.

Status IfcPropertyEnumeratedValue PEnum_ElementStatus

Status of the element, predominately used in renovation or retrofitting projects. The status can be assigned to as "New" - element designed as new addition, "Existing" - element exists and remains, "Demolish" - element existed but is to be demolished, "Temporary" - element will exists only temporary (like a temporary support structure).

AirTerminalShape IfcPropertyEnumeratedValue PEnum_AirTerminalShape

Shape of the air terminal. Slot is typically a long narrow supply device with an aspect ratio generally greater than 10 to 1.

FaceType IfcPropertyEnumeratedValue PEnum_AirTerminalFaceType

Identifies how the terminal face of an AirTerminal is constructed.

SlotWidth IfcPropertySingleValue IfcPositiveLengthMeasure

Slot width.

SlotLength IfcPropertySingleValue IfcPositiveLengthMeasure

Slot length.

NumberOfSlots IfcPropertySingleValue IfcCountMeasure

Indicates the number of slots.

FlowPattern IfcPropertyEnumeratedValue PEnum_AirTerminalFlowPattern

Flow pattern.

AirFlowRateRange IfcPropertyBoundedValue IfcVolumetricFlowRateMeasure

Possible range of airflow that can be delivered.

Air flowrate range within which the air terminal is designed to operate.

TemperatureRange IfcPropertyBoundedValue IfcThermodynamicTemperatureMeasure

Allowable maximum and minimum temperature.

Temperature range within which the air terminal is designed to operate.

DischargeDirection IfcPropertyEnumeratedValue PEnum_AirTerminalDischargeDirection

Discharge direction of the air terminal.

Parallel: discharges parallel to mounting surface designed so that flow attaches to the surface. Perpendicular: discharges away from mounting surface. Adjustable: both parallel and perpendicular discharge.

ThrowLength IfcPropertySingleValue IfcLengthMeasure

The horizontal or vertical axial distance an airstream travels after leaving an AirTerminal before the maximum stream velocity is reduced to a specified terminal velocity under isothermal conditions at the upper value of the AirFlowrateRange.

AirDiffusionPerformanceIndex IfcPropertySingleValue IfcReal

The Air Diffusion Performance Index (ADPI) is used for cooling mode conditions. If several measurements of air velocity and air temperature are made throughout the occupied zone of a space, the ADPI is the percentage of locations where measurements were taken that meet the specifications for effective draft temperature and air velocity.

FinishType IfcPropertyEnumeratedValue PEnum_AirTerminalFinishType

The type of finish for the air terminal.

FinishColour IfcPropertySingleValue IfcLabel

The finish colour of the object.

AirTerminalMountingType IfcPropertyEnumeratedValue PEnum_AirTerminalMountingType

The way the air terminal is mounted to the ceiling, wall, etc.

Surface: mounted to the surface of something (e.g., wall, duct, etc.). Flat flush: mounted flat and flush with a surface. Lay-in: mounted in a lay-in type ceiling (e.g., a dropped ceiling grid).

CoreType IfcPropertyEnumeratedValue PEnum_AirTerminalCoreType

Identifies the way the core of the AirTerminal is constructed.

CoreSetHorizontal IfcPropertySingleValue IfcPlaneAngleMeasure

Degree of horizontal (in the X-axis of the LocalPlacement) blade set from the centerline.

CoreSetVertical IfcPropertySingleValue IfcPlaneAngleMeasure

Degree of vertical (in the Y-axis of the LocalPlacement) blade set from the centerline.

HasIntegralControl IfcPropertySingleValue IfcBoolean

If TRUE, a self powered temperature control is included in the AirTerminal.

FlowControlType IfcPropertyEnumeratedValue PEnum_AirTerminalFlowControlType

Type of flow control element that may be included as a part of the construction of the air terminal.

HasSoundAttenuator IfcPropertySingleValue IfcBoolean

If TRUE, the object has sound attenuation.

HasThermalInsulation IfcPropertySingleValue IfcBoolean

If TRUE, the air terminal has thermal insulation.

NeckArea IfcPropertySingleValue IfcAreaMeasure

Neck area of the air terminal.

EffectiveArea IfcPropertySingleValue IfcAreaMeasure

Effective discharge area of the air terminal.

AirFlowrateVersusFlowControlElement IfcPropertyTableValue IfcPositiveRatioMeasure/IfcVolumetricFlowRateMeasure

Air flowrate versus flow control element position at nominal pressure drop.


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Is this page difficult to understand? Let us know! Changelog IFC4 IFC4.3_DEV_0078979

  • applicability, IfcAirTerminalType
  • property, AirFlowRateRange
  • property, AirTerminalMountingType
  • property, AirTerminalShape
  • property, FinishColour
  • property, AirFlowrateRange
  • property, FinishColor
  • property, MountingType
  • property, Shape
  • property NumberOfSlots, Changed from "single IfcInteger" to "single IfcCountMeasure"