Pset_MaterialHygroscopic

BACnet MVD

#### 8.10.5.6 Pset_MaterialHygroscopic

PSET_TYPEDRIVENOVERRIDE / IfcMaterial

Natural language names

| Material Hygroscopic

Properties

buildingSMART Data Dictionary

PSD-XML

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.

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