#### 7.3.3.7 IfcUnitaryEquipment

| Equipement unitaire
| Einbaufertige Anlage

Unitary equipment typically combine a number of components into a single product, such as air handlers, pre-packaged rooftop air-conditioning units, and split systems.

> HISTORY New entity in IFC4

## Electrical System Design

Instance diagram

Identity

The Identity concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R | R | R | R |  |  | R | R | R
Export |  | R |  | R | R | R | R | R |  |  | R | R | R

Object Typing

The Object Typing concept applies to this entity as shown in Table 175.

Type
IfcDistributionElementType
Table 175 — IfcUnitaryEquipment Object Typing

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  | R |  | R

Properties for Occurrences

The Properties for Occurrences concept applies to this entity as shown in Table 176.

PredefinedType | Name
--- | ---
| Pset_ElectricalDeviceCommon
Table 176 — IfcUnitaryEquipment Properties for Occurrences

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R |  | R | R |  |  |  |  |
Export |  | O |  | R | R |  | R | R |  |  | R |  | R

Ports

The Ports concept applies to this entity as shown in Table 177.

PredefinedType | Name | Flow | Type | Description
--- | --- | --- | --- | ---
AIRHANDLER | ReturnAirIn | SINK | AIRCONDITIONING | Return air entering mixture or exhausted.
AIRHANDLER | SupplyAirOut | SOURCE | AIRCONDITIONING | Chilled supply air.
AIRHANDLER | OutsideAirIn | SINK | VENTILATION | Outside air entering mixture.
AIRHANDLER | ExhaustAirOut | SOURCE | EXHAUST | Exhaust air leaving to outside.
AIRHANDLER | ChilledWaterIn | SINK | CHILLEDWATER | Chilled water entering cooling coil.
AIRHANDLER | ChilledWaterOut | SOURCE | CHILLEDWATER | Chilled water leaving cooling coil.
AIRHANDLER | HeatingIn | SINK | HEATING | Steam entering heating coil.
AIRHANDLER | HeatingOut | SOURCE | HEATING | Steam leaving heating coil.
AIRHANDLER | Power | SINK | ELECTRICAL | Electrical power source.
AIRHANDLER | Control | SINK | CONTROL | Control system communication.
Table 177 — IfcUnitaryEquipment Ports

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R |  |  | R |  |  | R |  | R
Export |  |  |  |  | R |  |  | R |  |  | R |  | R

Spatial Containment

The Spatial Containment concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | O |  |  | R |  |  | R |  | R
Export |  |  |  |  | O |  |  | R |  |  | R |  | R

Body Geometry

The Body Geometry concept applies to this entity as shown in Table 178.

RepresentationType | Geometry | Description
--- | --- | ---
Brep | IfcFacetedBrep | All fixtures (all non distribution flow elements, i.e. everything which is not a duct, a pipe, a cable, or a cable carrier) should be defined by an b-rep geometry. This includes also the complex flow fitting elements (e.g. Y branch or T branch) or distribution flow elements with size changes (e.g. reducer).
SurfaceModel | IfcFaceBasedSurfaceModel | If the geometric model consistency of a b-rep shape representation can not be guaranteed (arcwise connected volume bounded by faces, each being connected, oriented, finite, closed 2-manifold), a surface representation based on open shells should be used.
SweptSolid | IfcExtrudedAreaSolid | All "simple" distribution flow elements (general ducts and pipes) are defined by sweep geometry.
SectionedSpine | IfcSectionedSpine | If only the analytical shape is required for which the exact interpolation between the cross sections is not required, a sectioned spine can be used.
CSG | IfcCsgSolid |
Tessellation | IfcTriangulatedFaceSet |
MappedRepresentation | IfcMappedItem | All occurrences of IfcDistributionElement (and its subtypes) should (whenever possible) share a representation map established by the assigned type. The geometric representation of the occurrence is then an IfcMappedItem.
Table 178 — IfcUnitaryEquipment Body Geometry

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  | R | R | R
Export |  |  |  |  |  |  |  |  |  |  | R | R | R

Placement

The Placement concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  | R |  |  | R |  | R
Export |  |  |  |  |  |  |  | R |  |  | R |  | R

Classification

The Classification concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  | R
Export |  |  |  |  |  |  |  |  |  |  |  |  | R

Properties for Types

The Properties for Types concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  | -
Export |  |  |  |  |  |  |  |  |  |  |  |  | -

Footprint Geometry

The Footprint Geometry concept applies to this entity as shown in Table 179.

RepresentationType | Geometry
--- | ---
GeometricCurveSet | IfcGeometricCurveSet
Table 179 — IfcUnitaryEquipment Footprint Geometry

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  | O |  |  |  |  |
Export |  |  |  |  |  |  |  | O |  |  |  |  |

Clearance Geometry

The Clearance Geometry concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  | R |  |  |  |  |
Export |  |  |  |  |  |  |  | R |  |  |  |  |

XSD Specification:

<xs:element name="IfcUnitaryEquipment" type="ifc:IfcUnitaryEquipment" substitutionGroup="ifc:IfcEnergyConversionDevice" nillable="true"/>
<xs:complexType name="IfcUnitaryEquipment">
<xs:complexContent>
<xs:extension base="ifc:IfcEnergyConversionDevice"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcUnitaryEquipment

| SUBTYPE OF (IfcEnergyConversionDevice);

PredefinedType | : | OPTIONAL IfcStrippedOptional;

| WHERE

CorrectPredefinedType | : | NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcUnitaryEquipmentTypeEnum.USERDEFINED) OR ((PredefinedType = IfcUnitaryEquipmentTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned | : | (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCUNITARYEQUIPMENTTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

END_ENTITY;

Formal Propositions:

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

Inheritance Graph:

ENTITY IfcUnitaryEquipment

| 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 IfcStrippedOptional;

| 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 IfcStrippedOptional;

| INVERSE

IsInterferedByElements | : | SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements | : | SET OF IfcRelInterferesElements FOR RelatingElement;
ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

| ENTITY IfcDistributionElement

| INVERSE

| ENTITY IfcDistributionFlowElement

| INVERSE

| ENTITY IfcEnergyConversionDevice

| ENTITY IfcUnitaryEquipment

PredefinedType | : | OPTIONAL IfcStrippedOptional;

END_ENTITY;

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