Designation:E2178−13StandardTestMethodforAirPermeanceofBuildingMaterials1ThisstandardisissuedunderthefixeddesignationE2178;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodistodeterminetheairpermeanceofbuildingmaterialsatvariouspressuredifferentialswiththeintentofdetermininganassignedairpermeancerateofthematerialatthereferencepressuredifference(∆P)of75Pa.1.2Themethodisintendedtoassessflexiblesheetorrigidpanel-typematerialsusinga1m×1mspecimensize.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementsareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E283TestMethodforDeterminingRateofAirLeakageThroughExteriorWindows,CurtainWalls,andDoorsUnderSpecifiedPressureDifferencesAcrosstheSpeci-menE631TerminologyofBuildingConstructionsE1677SpecificationforAirBarrier(AB)MaterialorSystemforLow-RiseFramedBuildingWalls3.Terminology3.1Definitions:3.1.1Fordefinitionsofgeneraltermsrelatedtobuildingconstructionusedinthistestmethod,refertoTerminologyE631.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1airpermeance—therateofairflow(L/s),perunitarea(m2)andperunitstaticpressuredifferential(Pa).4.SignificanceandUse4.1Thepurposeofthistestistomeasuretheairpermeanceofflexiblesheetorrigidpanel-typematerials.Theresultsofthistestmaybeusefulindeterminingsuitabilityofthatmaterialasacomponentofanairretardersystem.4.2Thismethoddoesnotaddresstheinstalledairleakageperformanceofbuildingmaterials.Theinstalledperformanceofairretardermaterialsandairretardersystemsinlow-riseframedwallconstructioni...
