IFC 4.3.2.20240128 (IFC4X3_ADD2) under development

6.2.8.1 PEnum_AirSideSystemDistributionType

6.2.8.1.1 Semantic definition

Type	Description
`DUALDUCT`	Dual Duct
`MULTIZONE`	Multizone
`SINGLEDUCT`	Single Duct
`OTHER`	required category not on scale
`NOTKNOWN`	Value is unkown
`UNSET`	Value has not been specified

Table 6.2.8.1.A

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