1、Designation:E142491(Reapproved 2008)Standard Test Method forDetermining the Rate of Air Leakage Through ExteriorWindows,Curtain Walls,and Doors Under SpecifiedPressure and Temperature Differences Across theSpecimen1This standard is issued under the fixed designation E1424;the number immediately foll
2、owing the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method provid
3、es a standard laboratory proce-dure for determining the air leakage rates of exterior windows,curtain walls,and doors under specified differential air tem-perature and pressure conditions across the specimen.1.2 Specified temperature and pressure conditions are rep-resentative of those that may be e
4、ncountered at the exteriorthermal envelope of buildings,excluding the effects of heatbuildup due to solar radiation.1.3 This laboratory procedure is applicable to exteriorwindows,curtain walls,and doors and is intended to measureonly such leakage associated with the assembly and not theinstallation;
5、however,the test method can be adapted for thelatter purpose.1.4 This is a laboratory procedure for testing at differentialtemperature conditions.Persons interested in a laboratory testat ambient conditions should reference Test Method E283.Persons interested in a field test on installed windows and
6、doors should reference Test Method E783.1.5 Persons using this procedure should be knowledgeablein the areas of heat transfer,fluid mechanics,and instrumen-tation practices,and shall have a general understanding offenestration products and components.1.6 The values stated in SI units are to be regar
7、ded asstandard.The inch-pound units given in parenthesis are pro-vided for information only.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practice
8、s and determine the applica-bility of regulatory limitations prior to use.For specific hazardstatements,see Section 7.2.Referenced Documents2.1 ASTM Standards:2E283 Test Method for Determining Rate of Air LeakageThrough Exterior Windows,Curtain Walls,and DoorsUnder Specified Pressure Differences Acr
9、oss the Speci-menE631 Terminology of Building ConstructionsE783 Test Method for Field Measurement of Air LeakageThrough Installed Exterior Windows and Doors3.Terminology3.1 DefinitionsTerms used in this test method are definedin Terminology E631.3.2 Definitions of Terms Specific to This Standard:3.2
10、.1 air leakage rate(qAor qL)the air leakage per unit ofspecimen area(A)or per unit length of operable crackperimeter(L),expressed as m3/s-m2(ft3/min-ft2)or m3/s-m(ft3/min-ft).3.2.2 extraneous air leakage(Qe)the volume of airflowing per unit of time through the test chamber and testapparatus,exclusiv
11、e of the air flowing through the testspecimen,under a test pressure difference and test temperaturedifference,converted to standard conditions,expressed in m3/s(ft3/min).3.2.2.1 DiscussionExtraneous leakage is the sum of allleakage other than that intended to be measured by the test.3.2.3 specimen a
12、ir leakage(Qs)the volume of air flowingper unit of time through the specimen under a test pressuredifference and test temperature difference,converted to stan-dard conditions,expressed in m3/s(ft3/min).1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and i
13、s the direct responsibility of Subcommittee E06.51on Performance of Windows,Doors,Skylights and Curtain Walls.Current edition approved Sept.1,2008.Published October 2008.Originallyapproved in 1991.Last previous edition approved in 2000 as E1424 91(2000).DOI:10.1520/E1424-91R08.2For referenced ASTM s
14、tandards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 1942
15、8-2959.United States1 3.2.4 specimen area(A)the area determined by the overalldimensions of the frame that fits into the rough opening,expressed as m2(ft2).3.2.5 test mask assemblya wall construction that sur-rounds and supports the test specimen.3.2.6 test pressure differencesthe specified differen
16、tialstatic air pressure across the specimen,expressed in PA(lbf/ft2).3.2.7 test temperature differencethe specified difference intemperature across the test specimen,expressed as a set ofroom-side and weather-side temperatures,in C(F).3.2.8 total air flow(Qt)the volume of air flowing per unitof time through the test chamber and test apparatus,inclusiveof the air flowing through the test specimen,under a testpressure difference and test temperature difference,convertedto standard conditions,expre
