IfcAirTerminal

IfcAirTerminal

Definition from IAI: An IfcAirTerminal is a terminating or origination point for the transfer of air between distribution system(s) and one or more space. Air terminals can be any one of the following:

Diffuser - An outlet discharging supply air in various directions and planes.

Grille - A covering for any area through which air passes.

Register - A grille typically equipped with a damper or control valve.

Supply opening or Outlet - Any opening through which air is being delivered into a ventilated or conditioned space.

or control valve.

HISTORY: New entity in IFC R2x.
ISSUES: See issues and change log for changes made in IFC R2x.

Geometry Use Definitions

The geometric representation of IfcAirTerminal is given by the IfcProductDefinitionShape, allowing multiple geometric representations. Included are:

Standard Geometric Representation

The use of Standard Geometric Representations is defined at the supertype IfcDistributionFlowElement.

EXPRESS specification:

ENTITY IfcAirTerminal

SUBTYPE OF (

IfcFlowTerminal);

AirFlowType

IfcAirFlowTypeEnum;

Throw

OPTIONAL IfcLengthMeasure;

AirDiffusionPerformanceIndex

OPTIONAL IfcReal;

FinishType

OPTIONAL IfcAirTerminalFinishTypeEnum;

FinishColor

OPTIONAL IfcLabel;

MountingType

OPTIONAL IfcAirTerminalMountingTypeEnum;

FaceType

OPTIONAL IfcAirTerminalFaceTypeEnum;

CoreType

OPTIONAL IfcAirTerminalCoreTypeEnum;

CoreSetVertical

OPTIONAL IfcPlaneAngleMeasure;

CoreSetHorizontal

OPTIONAL IfcPlaneAngleMeasure;

IntegralControl

OPTIONAL IfcBoolean;

END_ENTITY;

Attribute definitions:

AirFlowType	:	Enumeration of possible AirTerminal types (e.g., Supply, Return, Exhaust, etc.).
Throw	:	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.
AirDiffusionPerformanceIndex	:	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	:	The type of finish for the AirTerminal.
FinishColor	:	The finish color for the air terminal.
MountingType	:	The way the AirTerminal is mounted to the ceiling, wall, etc.
FaceType	:	Identifies how the terminal face of an AirTerminal is constructed.
CoreType	:	Identifies the way the core of the AirTerminal is constructed.
CoreSetVertical	:	Degree of blade set from the centerline.
CoreSetHorizontal	:	Degree of blade set from the centerline.
IntegralControl	:	If TRUE, a self powered temperature control is included in the AirTerminal.

References (1):

Name

Type

Referred through

Express-G

IfcFlowTerminal

Entity

Subtype

Diagram 2

Inheritance graph

ENTITY IfcAirTerminal;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

Decomposes

SET OF IfcRelDecomposes FOR RelatedObjects;

IsDecomposedBy

SET [0:1] OF IfcRelDecomposes FOR RelatingObject;

ENTITY IfcProduct;

ObjectPlacement

OPTIONAL IfcObjectPlacement;

Representation

OPTIONAL IfcProductRepresentation;

INVERSE

ReferencedBy

SET OF IfcRelAssignsToProduct FOR RelatingProduct;

ENTITY IfcElement;

Tag

OPTIONAL IfcIdentifier;

INVERSE

ConnectedTo

SET OF IfcRelConnectsElements FOR RelatingElement;

ConnectedFrom

SET OF IfcRelConnectsElements FOR RelatedElement;

ContainedInStructure

SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

ENTITY IfcDistributionFlowElement;

FlowElementType

IfcDistributionFlowElementTypeEnum;

INVERSE

HasControlElements

SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;

ENTITY IfcAirTerminal;

AirFlowType

IfcAirFlowTypeEnum;

Throw

OPTIONAL IfcLengthMeasure;

AirDiffusionPerformanceIndex

OPTIONAL IfcReal;

FinishType

OPTIONAL IfcAirTerminalFinishTypeEnum;

FinishColor

OPTIONAL IfcLabel;

MountingType

OPTIONAL IfcAirTerminalMountingTypeEnum;

FaceType

OPTIONAL IfcAirTerminalFaceTypeEnum;

CoreType

OPTIONAL IfcAirTerminalCoreTypeEnum;

CoreSetVertical

OPTIONAL IfcPlaneAngleMeasure;

CoreSetHorizontal

OPTIONAL IfcPlaneAngleMeasure;

IntegralControl

OPTIONAL IfcBoolean;

END_ENTITY;