| Name | Type | Description |
|---|
| UpperVaporResistanceFactor |
P_SINGLEVALUE / IfcPositiveRatioMeasure |
 |
Upper Vapor Resistance Factor |
The vapor permeability relationship of air/material (typically value > 1), measured in high relative humidity (typically in 95/50 % RH). |
|
| LowerVaporResistanceFactor |
P_SINGLEVALUE / IfcPositiveRatioMeasure |
|
Lower Vapor Resistance Factor |
The vapor permeability relationship of air/material (typically value > 1), measured in low relative humidity (typically in 0/50 % RH). |
|
| IsothermalMoistureCapacity |
P_SINGLEVALUE / IfcIsothermalMoistureCapacityMeasure |
|
Isothermal Moisture Capacity |
Based on water vapor density. |
|
| VaporPermeability |
P_SINGLEVALUE / IfcVaporPermeabilityMeasure |
|
Vapor Permeability |
The rate of water vapor transmission per unit area per unit of vapor pressure differential under test conditions. |
|
| MoistureDiffusivity |
P_SINGLEVALUE / IfcMoistureDiffusivityMeasure |
|
Moisture Diffusivity |
Moisture diffusivity is a transport property that is frequently used in the hygrothermal analysis of building envelope components. |
|