Defined in File Ifc4x3_rc1.h
IfcFan: public Ifc4x3_rc1::IfcFlowMovingDevice¶
A fan is a device which imparts mechanical work on a gas. A typical usage of a fan is to induce airflow in a building services air distribution system.
HISTORY New entity in IFC2x4
Type Use Definition IfcFan defines the occurrence of any fan; common information about fan types is handled by IfcFanType. The IfcFanType (if present) may establish the common type name, usage (predefined type), properties, materials, ports, composition, assignments, and representations. The IfcFanType is attached using the IfcRelDefinesByType objectified relationship and is accessible by the IsTypedBy inverse attribute. If the IfcFanType has ports or aggregated elements, such objects are reflected at the IfcFan occurrence using the IfcRelDefinesByObject relationship.
Property Use Definition The property sets relating to this entity are defined by IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. Property sets may also be specified at the IfcFanType, defining the common property data for all occurrences of the same type. They are then accessible by the IsTypedBy inverse attribute pointing to IfcFanType.HasPropertySets. If both are given, then the properties directly defined at IfcFan override the properties defined at IfcFanType. Refer to the documentation at the supertype IfcFlowMovingDevice and ancestors for inherited property set definitions. The following property set definitions are applicable to this entity: (All Types)
Pset_FanOccurrence (PSET_OCCURRENCEDRIVEN) Pset_FanPHistory (PSET_PERFORMANCEDRIVEN) Pset_FanTypeCommon (PSET_TYPEDRIVENOVERRIDE) Pset_FanTypeSmokeControl (PSET_TYPEDRIVENOVERRIDE)
Quantity Use Definition The quantities relating to this entity are defined by IfcElementQuantity and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. The following base quantities are defined and shall be exchanged with the IfcElementQuantity.Name = ‘BaseQuantities’. Other quantities, being subjected to local standard of measurement, may be defined with another string value assigned to Name. In this case a valid value for MethodOfMeasurement shall be provided.
Material Use Definition The material of the IfcFan is defined by IfcMaterialConstituentSet or as a fallback by IfcMaterial, and attached by the RelatingMaterial attribute on the IfcRelAssociatesMaterial relationship. It is accessible by the HasAssociations inverse attribute. Material information can also be given at the IfcFanType, defining the common attribute data for all occurrences of the same type. The following keywords for IfcMaterialConstituentSet.MaterialConstituents[n].Name shall be used:
Frame: The material used to construct the fan housing. Wheel: The material used to construct the fan wheel.
Port Use Definition The distribution ports relating to the IfcFan are defined by IfcDistributionPort and attached by the IfcRelConnectsPortToElement relationship. If the fan occurrence is defined by IfcFanType, then the port occurrences must reflect those defined at the IfcFanType using the IfcRelDefinesByObject relationship. Ports are specific to the IfcFan PredefinedType as follows indicated by the IfcDistributionPort Name, PredefinedType, and FlowDirection:
In (NOTDEFINED, SINK): Incoming air. Out (NOTDEFINED, SOURCE): Outgoing air.
Figure 224 illustrates fan port use. Figure 224 — Fan port use
Whether the optional attribute PredefinedType is defined for this IfcFan.
IfcFan(std::string v1_GlobalId, ::Ifc4x3_rc1::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description, boost::optional<std::string> v5_ObjectType, ::Ifc4x3_rc1::IfcObjectPlacement *v6_ObjectPlacement, ::Ifc4x3_rc1::IfcProductRepresentation *v7_Representation, boost::optional<std::string> v8_Tag, boost::optional<::Ifc4x3_rc1::IfcFanTypeEnum::Value> v9_PredefinedType)¶