IfcAirTerminalBox

IfcAirTerminalBox

Definition from IAI: This class defines properties of an air terminal box, which participates in an HVAC duct distribution system. An air terminal box is typically used to control or modulate the amount of air delivered to its downstream ductwork.

HISTORY: New entity in IFC R2.0
ISSUES: See issues and change log for changes made in IFC R2x.

Geometry Use Definitions

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

Local Placement

The use of local placement is defined at the supertype IfcDistributionFlowElement.

Standard Geometric Representation

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

EXPRESS specification:

ENTITY IfcAirTerminalBox

SUBTYPE OF (

IfcFlowController);

TerminalBoxType

IfcAirTerminalBoxEnum;

SoundLevel

OPTIONAL IfcMeasureWithUnit;

END_ENTITY;

Attribute definitions:

TerminalBoxType	:	Enumeration that identifies the type of terminal box (e.g., VariableAirVolume, ConstantVolume, VariableAirVolumeReheat, ConstantVolumeReheat, FanPowered, VariableAirVolumeDualDuct, etc.)
SoundLevel	:	Design sound power level defined in decibels with a reference quantity of picowatts.

References (1):

Name

Type

Referred through

Express-G

IfcFlowController

Entity

Subtype

Diagram 1

Inheritance graph

ENTITY IfcAirTerminalBox;

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 IfcAirTerminalBox;

TerminalBoxType

IfcAirTerminalBoxEnum;

SoundLevel

OPTIONAL IfcMeasureWithUnit;

END_ENTITY;