IfcAirFilter

IfcAirFilter

Definition from IAI: An IfcAirFilter is an apparatus used to remove particulate or gaseous matter from air. It is typically used in conjunction with another device, such as an AirHandler or PackagedACUnit.

HISTORY: New entity in IFC R2x.
ISSUES: See issues and change log for changes made in IFC R2x.

Geometry Use Definitions

The geometric representation of IfcAirFilter is given by the IfcProductDefinitionShape, allowing multiple geometric representations. Included are:

Local Placement

The use of local placement is defined at the supertype IfcDistributionFlowElement.

Standard Geometric Representation

The use of Standard Geometric Representations is defined at the supertype IfcDistributionFlowElement.

EXPRESS specification:

ENTITY IfcAirFilter

SUBTYPE OF (

IfcTreatmentDevice);

DirtyPressureDrop

OPTIONAL IfcPressureMeasure;

CleanPressureDrop

OPTIONAL IfcPressureMeasure;

Efficiency

OPTIONAL IfcRatioMeasure;

END_ENTITY;

Attribute definitions:

DirtyPressureDrop	:	Pressure drop at the maximum air flowrate across the filter when the filter needs replacement per ASHRAE Standard 52.1.
CleanPressureDrop	:	Pressure drop at the maximum air flowrate across the filter when the filter is new per ASHRAE Standard 52.1.
Efficiency	:	Efficiency value.

References (1):

Name

Type

Referred through

Express-G

IfcTreatmentDevice

Entity

Subtype

Diagram 2

Inheritance graph

ENTITY IfcAirFilter;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

Decomposes

SET OF IfcRelDecomposes FOR RelatedObjects;

IsDecomposedBy

SET [0:1] OF IfcRelDecomposes FOR RelatingObject;

ENTITY IfcProduct;

ObjectPlacement

OPTIONAL IfcObjectPlacement;

Representation

OPTIONAL IfcProductRepresentation;

INVERSE

ReferencedBy

SET OF IfcRelAssignsToProduct FOR RelatingProduct;

ENTITY IfcElement;

Tag

OPTIONAL IfcIdentifier;

INVERSE

ConnectedTo

SET OF IfcRelConnectsElements FOR RelatingElement;

ConnectedFrom

SET OF IfcRelConnectsElements FOR RelatedElement;

ContainedInStructure

SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

ENTITY IfcDistributionElement;

ENTITY IfcDistributionFlowElement;

FlowElementType

IfcDistributionFlowElementTypeEnum;

INVERSE

HasControlElements

SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;

ENTITY IfcTreatmentDevice;

ENTITY IfcAirFilter;

DirtyPressureDrop

OPTIONAL IfcPressureMeasure;

CleanPressureDrop

OPTIONAL IfcPressureMeasure;

Efficiency

OPTIONAL IfcRatioMeasure;

END_ENTITY;