1.1 本火灾测试响应标准规定了两种单独的方法，以评估安装在垂直墙上或屋檐下区域的山墙端、爬行空间（基础）和其他通风口抵抗通过余烬和火焰通风口进入的能力。未评估此类通风口完全排除火焰或灰烬进入的能力。本标准不包括屋脊和屋脊外（现场）通风口。本标准未提供验收标准。 注1: 试验方法 E2912 记录与评估完全相关的信息，不包括通过通风装置进入的火焰。 1.2 使用不同的测试程序分别评估灰烬进入和火焰穿透。本文对ember试验装置的发展进行了评述和总结 附录X1 . 1.3 这些实验室测试用于评估在受控条件下暴露于余烬和火焰时通风口的响应。 1.4 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 1.5 除非另有规定，否则本文件中图和文本中的尺寸公差应为±5%。 1.6 本试验方法不涉及内部火灾蔓延。 1.7 本标准用于测量和描述材料、产品或组件在受控条件下对热量和火焰的响应，但其本身并不包括在实际火灾条件下对材料、产品或组件和其他覆层材料进行火灾危险或火灾风险评估所需的所有因素。 1.8 本标准并非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制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.9 火灾测试本身就很危险。在进行这些测试时，应采取适当的人员和财产保护措施。 1.10 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 本试验方法评估垂直或水平安装的外部通风口抵抗余烬进入和火焰穿透通风口的能力。 注3: 对美国国家标准与技术研究所（NIST）开发的垂直气流装置和水平气流装置进行了比较研究。该比较研究的结果总结见第节 X1.3 附录。 5.2 火焰侵入试验- 请参阅测试方法中的重要和使用部分 E2912 有关通风口上直接火焰撞击的信息。

1.1 This fire-test-response standard prescribes two individual methods to evaluate the ability of a gable end, crawl space (foundation) and other vents that mount on a vertical wall or in the under-eave area to resist the entry through the vent opening of embers and flame. The ability of such vents to completely exclude entry of flames or embers is not evaluated. Roof ridge and off-ridge (field) vents are excluded from this standard. Acceptance criteria are not provided in this standard. Note 1: Test Method E2912 records information relevant to evaluate completely excluding the entry of flames through the venting device. 1.2 Ember entry and flame penetration are evaluated separately using different test procedures. A commentary and summary of the development of the ember test apparatus are given in Appendix X1 . 1.3 These laboratory tests are used to evaluate the response of vents when subjected to ember and flame exposures under controlled conditions. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 Unless otherwise specified, the tolerance for dimensions in figures and text in this document shall be ±5 %. 1.6 This test method does not address interior fire spread. 1.7 The standard is used to measure and describe the response of materials, products or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessments of the materials, products or assemblies and other cladding materials under actual fire conditions. 1.8 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. 1.9 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.10 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 evaluates the ability of exterior vents that mount vertically or horizontally to resist the entry of embers and flame penetration through the vent. Note 3: A comparison study between the vertical air flow apparatus and a horizontal air flow apparatus, developed at the National Institute of Standards and Technology (NIST), has been conducted. A summary of the results of that comparison study are presented in Section X1.3 of the Appendix. 5.2 Flame Intrusion Test— Refer to the Significant and Use Section in Test Method E2912 for information related to the direct flame impingement on the vent.