#### 7.3.3.1 IfcBoiler

| Chaudière
| Heizkessel

A boiler is a closed, pressure-rated vessel in which water or other fluid is heated using an energy source such as natural gas, heating oil, or electricity. The fluid in the vessel is then circulated out of the boiler for use in various processes or heating applications.

IfcBoiler is a vessel solely used for heating of water or other fluids. Storage vessels, such as for drinking water storage are considered as tanks and use the IfcTank entity.

> HISTORY New entity in IFC4

## Plumbing System Design

Instance diagram

Identity

The Identity concept applies to this entity.

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

Object Typing

The Object Typing concept applies to this entity as shown in Table 73.

Type
IfcBoilerType
Table 73 — IfcBoiler Object Typing

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

Properties for Occurrences

The Properties for Occurrences concept applies to this entity as shown in Table 74.

PredefinedType | Name
--- | ---
| Pset_BoilerPHistory
| Pset_BoilerTypeCommon
STEAM | Pset_BoilerTypeSteam
WATER | Pset_BoilerTypeWater
Table 74 — IfcBoiler Properties for Occurrences

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

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 75.

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

Ports

The Ports concept applies to this entity as shown in Table 76.

PredefinedType | Name | Flow | Type | Description
--- | --- | --- | --- | ---
WATER | Gas | SINK | GAS | Gas inlet for burner.
WATER | Exhaust | SOURCE | EXHAUST | Exhaust sent to outside.
WATER | ColdWater | SINK | DOMESTICCOLDWATER | Cold water to be heated.
WATER | HotWater | SOURCE | DOMESTICHOTWATER | Hot water heated.
Table 76 — IfcBoiler Ports

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

Body Geometry

The Body Geometry concept applies to this entity as shown in Table 77.

RepresentationType | Geometry
--- | ---
MappedRepresentation | IfcMappedItem
Table 77 — IfcBoiler Body Geometry

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

Clearance Geometry

The Clearance Geometry concept applies to this entity.

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

XSD Specification:

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

EXPRESS Specification:

ENTITY IfcBoiler

| SUBTYPE OF (IfcEnergyConversionDevice);

PredefinedType | : | OPTIONAL IfcStrippedOptional;

| WHERE

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

END_ENTITY;

Formal Propositions:

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

Inheritance Graph:

ENTITY IfcBoiler

| 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

ConnectedTo | : | SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements | : | SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements | : | SET OF IfcRelInterferesElements FOR RelatingElement;
HasOpenings | : | SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
ProvidesBoundaries | : | SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom | : | SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

| ENTITY IfcDistributionElement

| INVERSE

HasPorts | : | SET OF IfcRelConnectsPortToElement FOR RelatedElement;

| ENTITY IfcDistributionFlowElement

| INVERSE

| ENTITY IfcEnergyConversionDevice

| ENTITY IfcBoiler

PredefinedType | : | OPTIONAL IfcStrippedOptional;

END_ENTITY;

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