1.1 本试验方法是试验方法的修改版本 E283/E283M ，并提供了一个标准实验室程序，用于在规定的样品压差条件下，分别确定通过外窗、幕墙和门的表面和侧面的空气泄漏。所述试验方法适用于整个试样的恒温恒湿试验。 注1: 对具有连续空气屏障的建筑物进行详细设计时，需要明确定义窗系统中的空气屏障平面。当特殊情况要求将空气屏障密封到窗框上的位置与本试验方法中用于将试样密封到试验室的位置不同时，可能需要进行额外的实验室试验，以澄清通过窗框侧面的气流的潜在路径。 本文所述的适配测试程序旨在实现此目的。 1.2 本实验室程序适用于外窗、幕墙和门，仅用于测量与组件相关的泄漏，而不是安装。试验方法可用于后一目的。 注2: 在非环境条件下或在试样上存在温差的情况下进行试验可能会影响空气泄漏率。本试验方法未解决这一问题。 1.3 本试验方法适用于实验室使用。对已安装装置进行现场空气泄漏试验感兴趣的人员应参考试验方法 E783 .试验方法 E783 不会为用户提供确定通过试样侧面的气流的方法。 1.4 使用本程序的人员应熟悉流体力学、仪器实践领域，并对开窗产品和组件有全面了解。 1.5 以国际单位制表示的数值应视为标准值。括号中给出的数值是英寸-磅单位的数学转换，仅供参考，不被视为标准。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 有关具体危险说明，请参见第节 7. . 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ===意义和用途====== 5.1 本试验方法是一个标准程序，用于确定在环境条件下规定空气压力差下车窗系统各部件的气流特性。 注3: 作用在建筑围护结构上的空气压力差变化很大。文献中讨论了影响空气压力差的因素以及与建筑物内环境相关的空气泄漏的影响。 4. , 5. , 6. 在规定要使用的试验压差时，应充分考虑这些因素。 5.2 空气泄漏率有时用于比较目的。除非被测试和比较的部件具有基本相同的尺寸、配置和设计，否则此类比较可能无效。

1.1 This test method is a modified version of Test Method E283/E283M , and provides a standard laboratory procedure for determining air leakage separately through the face and sides of exterior windows, curtain walls, and doors under specified differential pressure conditions across the specimen. The test method described is for tests with constant temperature and humidity across the specimen. Note 1: Detailing buildings with continuous air barriers requires that the air barrier plane in a window system be clearly defined. When special circumstances dictate that the air barrier be sealed to the window frame at a location other than that used to seal the specimen to the test chamber in this test method, additional laboratory testing may be required to clarify potential paths of air flow through the sides of the window frame. The adapted testing procedure described herein is intended for this purpose. 1.2 This laboratory procedure is applicable to exterior windows, curtain walls, and doors and is intended to measure only such leakage associated with the assembly and not the installation. The test method can be adapted for the latter purpose. Note 2: Performing tests at non-ambient conditions or with a temperature differential across the specimen may affect the air leakage rate. This is not addressed by this test method. 1.3 This test method is intended for laboratory use. Persons interested in performing field air leakage tests on installed units should reference Test Method E783 . Test Method E783 will not provide the user with a means of determining air flow through the sides of tested specimens. 1.4 Persons using this procedure should be knowledgeable in the areas of fluid mechanics, instrumentation practices, and shall have a general understanding of fenestration products and components. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statement see Section 7 . 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method is a standard procedure for determining the air flow characteristics of various components of the window system under specified air pressure differences at ambient conditions. Note 3: The air pressure differences acting across a building envelope vary greatly. The factors affecting air pressure differences and the implications or the resulting air leakage relative to the environment within buildings are discussed in the literature. 4 , 5 , 6 These factors should be fully considered in specifying the test pressure differences to be used. 5.2 Rates of air leakage are sometimes used for comparison purposes. Such comparisons may not be valid unless the components being tested and compared are of essentially the same size, configuration, and design.