| 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. |
|
buildingSMART Data Dictionary
PSD-XML
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