Space heaters utilize a combination of radiation and/or natural convection using a heating source such as electricity, steam or hot water to heat a limited space or area. Examples of space heaters include radiators, convectors, baseboard and finned-tube heaters.

IfcUnitaryEquipment should be used for packaged units supporting a combination of heating, cooling, and/or dehumidification; IfcCoil should be used for coil-based floor heating.

HISTORY  New entity in IFC4
IFC4 CHANGE  Electric heaters formerly defined by IfcElectricHeaterType are now represented by this entity with PredefinedType set to CONVECTOR and Pset_SpaceHeaterCommon.HeatTransferDimension reflecting IfcElectricHeaterTypeEnum as follows: ELECTRICPOINTHEATER = POINT, ELECTRICCABLEHEATER = CURVE, ELECTRICMATHEATER = SURFACE.

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 568.

Table 568 — IfcSpaceHeater Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 569.

Table 569 — IfcSpaceHeater Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 570.

Table 570 — IfcSpaceHeater Quantity Sets

Material Constituents

The Material Constituents concept applies to this entity as shown in Table 571.
CasingMaterial from which the casing is constructed.

Table 571 — IfcSpaceHeater Material Constituents

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 572.
CONVECTORPowerSINKELECTRICALReceives electrical power.
RADIATORInletSINKHEATINGWater or steam supply.
RADIATOROutletSOURCEHEATINGWater or steam return.

Table 572 — IfcSpaceHeater Port Nesting

XSD Specification:

 <xs:element name="IfcSpaceHeater" type="ifc:IfcSpaceHeater" substitutionGroup="ifc:IfcFlowTerminal" nillable="true"/>
 <xs:complexType name="IfcSpaceHeater">
   <xs:extension base="ifc:IfcFlowTerminal">
    <xs:attribute name="PredefinedType" type="ifc:IfcSpaceHeaterTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcSpaceHeater
SUBTYPE OF IfcFlowTerminal;
PredefinedType : OPTIONAL IfcSpaceHeaterTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcSpaceHeaterTypeEnum.USERDEFINED) OR ((PredefinedType = IfcSpaceHeaterTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCSPACEHEATERTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

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

Inheritance Graph:

ENTITY IfcSpaceHeater
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
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;
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;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
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
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowTerminal
ENTITY IfcSpaceHeater
PredefinedType : OPTIONAL IfcSpaceHeaterTypeEnum;

Link to this page  Link to this page