IFC 4.3.x development

7.5.2.1 IfcAirTerminalBoxTypeEnum

7.5.2.1.1 Semantic definitions at the entity

This enumeration identifies different types of air terminal boxes.

HISTORY  New enumeration in IFC2.0.

Items

CONSTANTFLOW

Terminal box does not include a means to reset the volume automatically to an outside signal such as thermostat.

VARIABLEFLOWPRESSUREDEPENDANT

Terminal box includes a means to reset the volume automatically to a different control point in response to an outside signal such as thermostat: air-flow rate depends on supply pressure.

VARIABLEFLOWPRESSUREINDEPENDANT

Terminal box includes a means to reset the volume automatically to a different control point in response to an outside signal such as thermostat: air-flow rate is independant of supply pressure.

USERDEFINED

User-defined terminal box.

NOTDEFINED

Undefined terminal box.

7.5.2.1.1 Formal representations

TYPE IfcAirTerminalBoxTypeEnum = ENUMERATION OF
	(CONSTANTFLOW
	,VARIABLEFLOWPRESSUREDEPENDANT
	,VARIABLEFLOWPRESSUREINDEPENDANT
	,USERDEFINED
	,NOTDEFINED);
END_TYPE;