Class Ifc4x2::IfcAirToAirHeatRecovery

Nested Relationships

This class is a nested type of Struct Ifc4x2.

Inheritance Relationships

Base Type

Class Documentation

class Ifc4x2::IfcAirToAirHeatRecovery : public Ifc4x2::IfcEnergyConversionDevice

An air-to-air heat recovery device employs a counter-flow heat exchanger between inbound and outbound air flow. It is typically used to transfer heat from warmer air in one chamber to cooler air in the second chamber (i.e., typically used to recover heat from the conditioned air being exhausted and the outside air being supplied to a building), resulting in energy savings from reduced heating (or cooling) requirements.

HISTORY New entity in IFC2x4

Type Use Definition IfcAirToAirHeatRecovery defines the occurrence of any air to air heat recovery; common information about air to air heat recovery types is handled by IfcAirToAirHeatRecoveryType. The IfcAirToAirHeatRecoveryType (if present) may establish the common type name, usage (predefined type), properties, materials, ports, composition, assignments, and representations. The IfcAirToAirHeatRecoveryType is attached using the IfcRelDefinesByType objectified relationship and is accessible by the IsTypedBy inverse attribute. If the IfcAirToAirHeatRecoveryType has ports or aggregated elements, such objects are reflected at the IfcAirToAirHeatRecovery 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 IfcAirToAirHeatRecoveryType, defining the common property data for all occurrences of the same type. They are then accessible by the IsTypedBy inverse attribute pointing to IfcAirToAirHeatRecoveryType.HasPropertySets. If both are given, then the properties directly defined at IfcAirToAirHeatRecovery override the properties defined at IfcAirToAirHeatRecoveryType. Refer to the documentation at the supertype IfcEnergyConversionDevice and ancestors for inherited property set definitions. The following property set definitions are applicable to this entity: Pset_AirToAirHeatRecoveryPHistory (PSET_PERFORMANCEDRIVEN) Pset_AirToAirHeatRecoveryTypeCommon (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 IfcAirToAirHeatRecovery 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 IfcAirToAirHeatRecoveryType, defining the common attribute data for all occurrences of the same type. The following keywords for IfcMaterialConstituentSet.MaterialConstituents[n].Name shall be used:

Body: The primary material from which the object is constructed. Media: The primary media material used for heat transfer.

Port Use Definition The distribution ports relating to the IfcAirToAirHeatRecovery are defined by IfcDistributionPort and attached by the IfcRelConnectsPortToElement relationship. If the air to air heat recovery occurrence is defined by IfcAirToAirHeatRecoveryType, then the port occurrences must reflect those defined at the IfcAirToAirHeatRecoveryType using the IfcRelDefinesByObject relationship. Ports are specific to the IfcAirToAirHeatRecovery PredefinedType as follows indicated by the IfcDistributionPort Name, PredefinedType, and FlowDirection:

AirInlet (AIRCONDITIONING, SINK): Cold air in. AirOutlet (AIRCONDITIONING, SOURCE): Colder air out. ExhaustInlet (VENTILATION, SINK): Hot return air in. ExhaustOutlet (VENTILATION, SOURCE): Hotter return air out.

Public Functions

bool hasPredefinedType() const

Whether the optional attribute PredefinedType is defined for this IfcAirToAirHeatRecovery.

::Ifc4x2::IfcAirToAirHeatRecoveryTypeEnum::Value PredefinedType() const
void setPredefinedType(::Ifc4x2::IfcAirToAirHeatRecoveryTypeEnum::Value v)
const IfcParse::entity &declaration() const
IfcAirToAirHeatRecovery(IfcEntityInstanceData *e)
IfcAirToAirHeatRecovery(std::string v1_GlobalId, ::Ifc4x2::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description, boost::optional<std::string> v5_ObjectType, ::Ifc4x2::IfcObjectPlacement *v6_ObjectPlacement, ::Ifc4x2::IfcProductRepresentation *v7_Representation, boost::optional<std::string> v8_Tag, boost::optional<::Ifc4x2::IfcAirToAirHeatRecoveryTypeEnum::Value> v9_PredefinedType)

Public Static Functions

const IfcParse::entity &Class()