ASTM E779-2019 用风扇增压法测定漏气量的试验方法 Standard Test Method for Determining Air Leakage Rate by Fan Pressurization
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- 标准大小:
- 标准编号:ASTM E779-2019
- 标准状态:现行
- 更新时间:2023-08-16
- 下载次数:次
1.1 This test method measures air-leakage rates through a building envelope under controlled pressurization and de-pressurization.
1.2 This test method is applicable to small temperature differentials and low-wind pressure differential, therefore strong winds and large indoor-outdoor temperature differentials shall be avoided.
1.3 This test method is intended to quantify the air tightness of a building envelope. This test method does not measure air change rate or air leakage rate under normal weather conditions and building operation.
Note 1: See Test Method E741 to directly measure air-change rates using the tracer gas dilution method.
1.4 This test method is intended to be used for measuring the air tightness of building envelopes of single-zone buildings. For the purpose of this test method, many multi-zone buildings can be treated as single-zone buildings by opening interior doors or by inducing equal pressures in adjacent zones.
1.5 Only metric SI units of measurement are used in this standard. If a value for measurement is followed by a value in other units in parentheses, the second value may be approximate. The first stated value is the requirement.
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