ASTM E1827-1996(2007) Standard Test Methods for Determining Airtightness of Buildings Using an Orifice Blower Door《用风孔门测定建筑物空气密封性的标准试验方法》.pdf
《ASTM E1827-1996(2007) Standard Test Methods for Determining Airtightness of Buildings Using an Orifice Blower Door《用风孔门测定建筑物空气密封性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM E1827-1996(2007) Standard Test Methods for Determining Airtightness of Buildings Using an Orifice Blower Door《用风孔门测定建筑物空气密封性的标准试验方法》.pdf(12页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E 1827 96 (Reapproved 2007)Standard Test Methods forDetermining Airtightness of Buildings Using an OrificeBlower Door1This standard is issued under the fixed designation E 1827; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 en
3、velope in buildingsthat may be 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 deter
4、mine airtightness andother leakage 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
5、results increases withincreasing wind 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 E 741.1.5 The text of these test methods reference notes and
6、footnotes that provide explanatory material. 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 th
7、e user of this standard to establish appro-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:2E 456 Terminology Relating to Quality and StatisticsE 631 Term
8、inology of Building ConstructionsE 741 Test Method for Determining Air Change in a SingleZone by Means of a Tracer Gas DilutionE 779 Test Method for Determining Air Leakage Rate byFan PressurizationE 1186 Practices forAir Leakage Site Detection in BuildingEnvelopes and Air Barrier SystemsE 1258 Test
9、 Method for Airflow Calibration of Fan Pressur-ization Devices2.2 ISO International Standard:3ISO 9972 Thermal InsulationDetermination of BuildingAirtightnessFan Pressurization Method2.3 Other Standard:3ANSI/ASME PTC 19.1Part 1, Measurement Uncertainty,Instruments, and Apparatus3. Terminology3.1 Def
10、initionsRefer to Terminology E 456 for definitionsof accuracy, bias, precision, and uncertainty.3.1.1 ACH50, nthe ratio of the air leakage rate at 50 Pa(0.2 in. H2O), corrected for a standard air density, to thevolume of the test zone (1/h).3.1.2 air leakage rate, Qenv, nthe total volume of airpassi
11、ng through the test zone envelope per unit of time (m3/s,ft3/min).3.1.3 airtightness, nthe degree to which a test zoneenvelope resists the flow of air.NOTE 1ACH50, air leakage rate, and effective leakage area areexamples of measures of building airtightness.3.1.4 blower door, na fan pressurization d
12、evice incorpo-rating a controllable fan and instruments for airflow measure-ment and building pressure difference measurement thatmounts securely in a door or other opening.3.1.5 building pressure difference, P, nthe pressure differ-ence across the test zone envelope (Pa, in. H2O).3.1.6 fan airflow
13、rate, Qfan, nthe volume of airflowthrough the blower door per unit of time (m3/s, ft3/min).1These 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 editio
14、n approved Aug. 1, 2007. Published August 2007. Originallyapproved in 1996. Last previous edition approved in 2002 as E 1827 96 (2002).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume inf
15、ormation, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959
16、, United States.3.1.7 nominal airflow rate, Qnom, nthe flow rate indicatedby the blower door using the manufacturers calibrationcoefficients (m3/s, ft3/min).3.1.8 orifice blower door, na blower door in whichairflow rate is determined by means of the pressure drop acrossan orifice or nozzle.3.1.9 pre
17、cision index of the average, nthe sample stan-dard deviation divided by the square root of the number ofsamples.33.1.10 pressure station, na specified induced change inthe building pressure difference from the initial zero-flowbuilding pressure difference (Pa, in. H2O).3.1.11 single zone, na space i
18、n which the pressure differ-ences between any two places, as indicated on a manometer,differ by no more than 2.5 Pa (0.01 in. H2O) during fanpressurization at a building pressure difference of 50 Pa (0.2 in.H2O) and by no more than 5 % of the highest building pressuredifference achieved.NOTE 2A mult
19、iroom space that is interconnected within itself withdoor-sized openings through any partitions or floors is likely to satisfy thiscriterion if the fan airflow rate is less than 3 m3/s (6 3 103ft3/min) and thetest zone envelope is not extremely leaky.3.1.12 test zone, na building or a portion of a b
20、uilding thatis configured as a single zone for the purpose of this standard.NOTE 3For detached dwellings, the test zone envelope normallycomprises the thermal envelope.3.1.13 test zone envelope, nthe barrier or series of barriersbetween a test zone and the outdoors.NOTE 4The user establishes the tes
21、t zone envelope at such places asbasements or neighboring rooms by choosing the level of resistance toairflow between the test zone and outdoors with such measures as openingor closing windows and doors to, from, and within the adjacent spaces.3.1.14 zero-flow building pressure difference, nthe natu
22、ralbuilding pressure difference measured when there is no flowthrough the blower door.3.2 SymbolsThe following is a summary of the principalsymbols used in these test methods:Alt = altitude at site, m (ft),C = flow coefficient at standard conditions, m3/s(Pan)ft3/min (in. H2On),4L = effective leakag
23、e area at standard conditions,m2(in.2),n = envelope flow exponent (dimensionless),P = building pressure difference (see 3.1.5),P1= average pressure, Psta, at the primary pres-sure station, Pa (in. H2O),P2= average pressure, Psta, at the secondary pres-sure station, Pa (in. H2O),Pref= the reference p
24、ressure differential across thebuilding envelope, Pa (in. H2O),Psta= station pressure, Pa (in. H2O),Ptest= test pressure, Pa (in. H2O),Pzero1= zero-airflow pressure before test, Pa (in.H2O),Pzero2= zero-airflow pressure after test, Pa (in. H2O),Qenv= the air leakage rate, m3/s (ft3/min),Qenv1= avera
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