1、Designation:E182711Standard Test Methods forDetermining Airtightness of Buildings Using an OrificeBlower Door1This standard is issued under the fixed designation E1827;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、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 These test methods describe two techniques for measur-ing air leakage rates through a building envelope in buildingsthat may be
3、configured to a single zone.Both techniques use anorifice blower door to induce pressure differences across thebuilding envelope and to measure those pressure differencesand the resulting airflows.The measurements of pressuredifferences and airflows are used to determine airtightness andother leakag
4、e characteristics of the envelope.1.2 These test methods allow testing under depressurizationand pressurization.1.3 These test methods are applicable to small indoor-outdoor temperature differentials and low wind pressure con-ditions;the uncertainty in the measured results increases withincreasing w
5、ind speeds and temperature differentials.1.4 These test methods do not measure air change rate undernormal conditions of weather and building operation.Tomeasure air change rate directly,use Test Methods E741.1.5 The text of these test methods reference notes andfootnotes that provide explanatory ma
6、terial.These notes andfootnotes,excluding those in tables and figures,shall not beconsidered as requirements of the standard.1.6 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-
7、priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specific hazardstatements see Section 7.2.Referenced Documents2.1 ASTM Standards:2E456 Terminology Relating to Quality and StatisticsE631 Terminology of Building ConstructionsE741 Test Meth
8、od for Determining Air Change in a SingleZone by Means of a Tracer Gas DilutionE779 Test Method for DeterminingAir Leakage Rate by FanPressurizationE1186 Practices for Air Leakage Site Detection in BuildingEnvelopes and Air Barrier SystemsE1258 Test Method for Airflow Calibration of Fan Pressur-izat
9、ion Devices2.2 ISO International Standards:3ISO 9972 Thermal InsulationDetermination of BuildingAirtightnessFan Pressurization Method2.3 Other Standards:3ANSI/ASMEPTC19.11985 Part1:MeasurementUncertainty,Instruments,and Apparatus3.Terminology3.1 Definitions:3.1.1 For definitions of general terms rel
10、ated to buildingconstruction used in this test methods,refer to TerminologyE631 and for general terms related to accuracy,bias,precision,and uncertainty refer to Terminology E456.3.2 Definitions of Terms Specific to This Standard:3.2.1 ACH50,nthe ratio of the air leakage rate at 50 Pa(0.2 in.H2O),co
11、rrected for a standard air density,to thevolume of the test zone(1/h).3.2.2 air leakage rate,Qenv,nthe total volume of airpassing through the test zone envelope per unit of time(m3/s,ft3/min).3.2.3 airtightness,nthe degree to which a test zoneenvelope resists the flow of air.NOTE1ACH50,air leakage r
12、ate,and effective leakage area areexamples of measures of building airtightness.3.2.4 blower door,na fan pressurization device incorpo-rating a controllable fan and instruments for airflow measure-ment and building pressure difference measurement thatmounts securely in a door or other opening.1These
13、 test methods are under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and are the direct responsibility of Subcommittee E06.41on Air Leakage and Ventilation Performance.Current edition approved Sept.1,2011.Published October 2011.Originallyapproved in 1996.Last previous edition ap
14、proved in 2007 as E1827 96(2007).DOI:10.1520/E1827-11.2For referenced ASTM standards,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.3Available f
15、rom American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.5 building pressure difference,P,nthe pressure differ-ence across the test zo
16、ne envelope(Pa,in.H2O).3.2.6 fan airflow rate,Qfan,nthe volume of airflowthrough the blower door per unit of time(m3/s,ft3/min).3.2.7 nominal airflow rate,Qnom,nthe flow rate indicatedby the blower door using the manufacturers calibrationcoefficients(m3/s,ft3/min).3.2.8 orifice blower door,na blower door in which airflowrate is determined by means of the pressure drop across anorifice or nozzle.3.2.9 precision index of the average,nthe sample standarddeviation divided by the square root of the n
