<?xml version="1.0"?>
<PropertySetDef xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" ifdguid="c40da900d1de11e1800000215ad4efdf" templatetype="PSET_PERFORMANCEDRIVEN" xsi:noNamespaceSchemaLocation="http://buildingSMART-tech.org/xml/psd/PSD_IFC4.xsd">
  <IfcVersion version="IFC4" />
  <Name>Pset_DuctSilencerPHistory</Name>
  <Definition>Duct silencer performance history common attributes.</Definition>
  <Applicability />
  <ApplicableClasses>
    <ClassName>IfcDuctSilencer</ClassName>
  </ApplicableClasses>
  <ApplicableTypeValue>IfcDuctSilencer</ApplicableTypeValue>
  <PropertyDefs>
    <PropertyDef ifdguid="ca038a00d1de11e1800000215ad4efdf">
      <Name>AirFlowRate</Name>
      <Definition>Volumetric air flow rate.</Definition>
      <PropertyType>
        <TypePropertyReferenceValue reftype="IfcTimeSeries" />
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Air Flow Rate</NameAlias>
        <NameAlias lang="ja-JP">風量</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
        <DefinitionAlias lang="ja-JP">体積風量</DefinitionAlias>
      </DefinitionAliases>
    </PropertyDef>
    <PropertyDef ifdguid="ce2fa780d1de11e1800000215ad4efdf">
      <Name>AirPressureDropCurve</Name>
      <Definition>Air pressure drop as a function of air flow rate.</Definition>
      <PropertyType>
        <TypePropertyReferenceValue reftype="IfcTimeSeries" />
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Air Pressure Drop Curve</NameAlias>
        <NameAlias lang="ja-JP">圧力降下曲線</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
        <DefinitionAlias lang="ja-JP">風量の関数としての空気圧力降下</DefinitionAlias>
      </DefinitionAliases>
    </PropertyDef>
  </PropertyDefs>
  <PsetDefinitionAliases>
    <PsetDefinitionAlias lang="en" />
    <PsetDefinitionAlias lang="ja-JP">ダクト消音器の性能履歴共通属性。</PsetDefinitionAlias>
  </PsetDefinitionAliases>
</PropertySetDef>