8.10.4.6 Pset_MaterialHygroscopic
8.10.4.6.1 Semantic definition
A set of hygroscopic properties of materials.
8.10.4.6.2 Applicable entities
8.10.4.6.3 Properties
| Name | Property Type | Data Type | Description | |
|---|---|---|---|---|
| UpperVaporResistanceFactor | IfcPropertySingleValue | IfcPositiveRatioMeasure |
The vapor permeability relationship of air/material (typically value > 1), measured in high relative humidity (typically in 95/50 % RH). |
|
| LowerVaporResistanceFactor | IfcPropertySingleValue | IfcPositiveRatioMeasure |
The vapor permeability relationship of air/material (typically value > 1), measured in low relative humidity (typically in 0/50 % RH). |
|
| IsothermalMoistureCapacity | IfcPropertySingleValue | IfcIsothermalMoistureCapacityMeasure |
Based on water vapor density. |
|
| VaporPermeability | IfcPropertySingleValue | IfcVaporPermeabilityMeasure |
The rate of water vapor transmission per unit area per unit of vapor pressure differential under test conditions. |
|
| MoistureDiffusivity | IfcPropertySingleValue | IfcMoistureDiffusivityMeasure |
Moisture diffusivity is a transport property that is frequently used in the hygrothermal analysis of building envelope components. |
