7.5.3.2 IfcAirTerminalBox

Diffuseur d'air
Volumenstromregler

An air terminal box typically participates in an HVAC duct distribution system and is used to control or modulate the amount of air delivered to its downstream ductwork. An air terminal box type is often referred to as an "air flow regulator".

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 436.
Type
IfcAirTerminalBoxType
IfcDistributionFlowElementType
IfcDistributionElementType

Table 436 — IfcAirTerminalBox Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 437.
PredefinedTypeName
 Pset_AirTerminalBoxPHistory
 Pset_AirTerminalBoxTypeCommon
 Pset_SoundGeneration
 Pset_ElectricalDeviceCommon
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 437 — IfcAirTerminalBox Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 438.
Name
Qto_AirTerminalBoxTypeBaseQuantities

Table 438 — IfcAirTerminalBox Quantity Sets



Material Constituents

The Material Constituents concept applies to this entity as shown in Table 439.
NameDescription
CasingMaterial from which the casing is constructed.

Table 439 — IfcAirTerminalBox Material Constituents



Port Nesting

The Port Nesting concept applies to this entity as shown in Table 440.
PredefinedTypeNameFlowTypeDescription
 InletSINKAIRCONDITIONINGIncoming air.
 OutletSOURCEAIRCONDITIONINGOutgoing regulated air.

Table 440 — IfcAirTerminalBox Port Nesting




XSD Specification:

 <xs:element name="IfcAirTerminalBox" type="ifc:IfcAirTerminalBox" substitutionGroup="ifc:IfcFlowController" nillable="true"/>
 <xs:complexType name="IfcAirTerminalBox">
  <xs:complexContent>
   <xs:extension base="ifc:IfcFlowController">
    <xs:attribute name="PredefinedType" type="ifc:IfcAirTerminalBoxTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcAirTerminalBox
SUBTYPE OF IfcFlowController;
PredefinedType : OPTIONAL IfcAirTerminalBoxTypeEnum;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcAirTerminalBoxTypeEnum.USERDEFINED) OR ((PredefinedType = IfcAirTerminalBoxTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCAIRTERMINALBOXTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcAirTerminalBoxType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no air terminal box type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcAirTerminalBoxType.

Inheritance Graph:

ENTITY IfcAirTerminalBox
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
INVERSE
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
INVERSE
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
INVERSE
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
INVERSE
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcDistributionElement
INVERSE
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
INVERSE
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowController
ENTITY IfcAirTerminalBox
PredefinedType : OPTIONAL IfcAirTerminalBoxTypeEnum;
END_ENTITY;

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