IfcAirTerminalType

Definition from IAI: The element type IfcAirTerminalType defines a list of commonly shared property set definitions of an air terminal and an optional set of product representations. It is used to define an air terminal specification (i.e. the specific product information, that is common to all occurrences of that product type).

An air terminal is a terminating or origination point for the transfer of air between distribution system(s) and one or more spaces. It can also be used for the transfer of air between adjacent spaces.

> NOTE: The product representations are defined as representation maps (at the level of the supertype IfcTypeProduct, which get assigned by an element occurrence instance through the IfcShapeRepresentation.Item[1] being an IfcMappedItem.

A air terminal type is used to define the common properties of a air terminal that may be applied to many occurrences of that type. An air terminal is a mechanical device used to control the characteristics air at the entrance or exit to an open system, such as a room or space. Air terminal types (or the instantiable subtypes) may be exchanged without being already assigned to occurrences.

The occurrences of the IfcAirTerminalType are represented by instances of IfcFlowTerminal or its subtypes.

Property Set Use Definition:

The property sets relating to this entity are defined by the IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. It is accessible by the inverse IsDefinedBy relationship. The following property set definitions specific to this entity are part of this IFC release:

- Pset_AirTerminalTypeCommon: common property set for all air terminal types
  - Pset_AirTerminalTypeRectangular: property set for rectangular shaped air terminal types
  - Pset_AirTerminalTypeRound: property set for round shaped air terminal types
  - Pset_AirTerminalTypeSlot: property set for slot air terminal types
  - Pset_AirTerminalTypeSquare: property set for square shaped air terminal types

> HISTORY: New entity in IFC Release 2x2.

EXPRESS specification:

ENTITY IfcAirTerminalType
SUBTYPE OF ( | IfcFlowTerminalType);
PredefinedType | : | IfcAirTerminalTypeEnum;
WHERE
WR1 | : | (PredefinedType <> IfcAirTerminalTypeEnum.USERDEFINED) OR ((PredefinedType = IfcAirTerminalTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;

Inheritance graph

ENTITY IfcAirTerminalType;
ENTITY IfcRoot;
GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;
ENTITY IfcObjectDefinition;
INVERSE
HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
IsDecomposedBy | : | SET OF IfcRelDecomposes FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcTypeObject;
ApplicableOccurrence | : | OPTIONAL IfcLabel;
HasPropertySets | : | OPTIONAL SET [1:?] OF IfcPropertySetDefinition;
INVERSE
ObjectTypeOf | : | SET [0:1] OF IfcRelDefinesByType FOR RelatingType;
ENTITY IfcTypeProduct;
RepresentationMaps | : | OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;
Tag | : | OPTIONAL IfcLabel;
ENTITY IfcElementType;
ElementType | : | OPTIONAL IfcLabel;
ENTITY IfcDistributionElementType;
ENTITY IfcDistributionFlowElementType;
ENTITY IfcFlowTerminalType;
ENTITY IfcAirTerminalType;
PredefinedType | : | IfcAirTerminalTypeEnum;
END_ENTITY;