1.1 本规程涵盖标准试样尺寸和试验条件，以及根据试验方法测量的热透射比和电导数据的计算和表示 C1199 . 标准尺寸和条件用于开窗产品比较。说明符可以为产品开发或研究目的选择其他尺寸和条件。 1.2 本规程涉及在不受太阳热增益和漏风影响的情况下，测定垂直安装的开窗系统的热性能。 注1: 为了确定开窗系统的漏气影响，试验方法 E283/E283M 或 E1424 应参考。 注2: 看见 附录X1 关于车库门和卷帘门。 1.3 本规程规定了使用房间侧和天气侧表面传热系数的规定值来确定开窗试样的标准化传热系数的程序， h h 和 h c 分别地 1.4 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.5 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。 1.6 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====== 4.1 本规程详细说明了根据试验方法测试门窗产品时，试样尺寸和试验条件，即房间侧和天气侧的空气温度，以及试样两侧的表面传热系数 C1199 . 4.2 试样的透热率和电导率受其尺寸和三维几何形状的影响。因此，应使用中建议的试样尺寸进行试验 5.1 . 如果试样尺寸与中给出的尺寸不同 5.1 实际尺寸应在试验报告中报告。 4.3 许多因素可以影响开窗系统的热性能，包括密封玻璃单元的挠度。在将其安装在环绕面板中时，应注意保持门窗系统的原始物理状态。 4.4 由于未考虑太阳辐射和空气泄漏效应，因此获得的热透射比和电导率结果并未也无意反映现场安装的预期性能。 热透射比和电导结果取自规定的实验室条件，仅用于门窗产品的比较，并作为热性能分析的输入，其中还包括太阳能和空气泄漏效应。

1.1 This practice covers standard test specimen sizes and test conditions as well as the calculation and presentation of the thermal transmittance and conductance data measured in accordance with Test Method C1199 . The standard sizes and conditions are to be used for fenestration product comparison purposes. The specifier may choose other sizes and conditions for product development or research purposes. 1.2 This practice deals with the determination of the thermal properties of a fenestration system installed vertically without the influences of solar heat gain and air leakage effects. Note 1: To determine air leakage effects of fenestration systems, Test Method E283/E283M or E1424 should be referenced. Note 2: See Appendix X1 regarding garage doors and rolling doors. 1.3 This practice specifies the procedure for determining the standardized thermal transmittance of a fenestration test specimen using specified values of the room-side and weather-side surface heat transfer coefficients, h h and h c , respectively. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 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. 1.6 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 ====== 4.1 This practice details the test specimen sizes and test conditions, namely, the room-side and weather-side air temperatures, and the surface heat transfer coefficients for both sides of the test specimen, when testing fenestration products in accordance with Test Method C1199 . 4.2 The thermal transmittance and conductance of a specimen are affected by its size and three-dimensional geometry. Tests should therefore be conducted using the specimen sizes recommended in 5.1 . Should the specimen size differ from those given in 5.1 , the actual size shall be reported in the test report. 4.3 Many factors can affect the thermal performance of a fenestration system, including deflections of sealed glazing units. Care should be exercised to maintain the original physical condition of the fenestration system and while installing it in the surround panel. 4.4 The thermal transmittance and conductance results obtained do not, and are not intended, to reflect performances expected from field installations since they do not account for solar radiation and air leakage effects. The thermal transmittance and conductance results are taken from specified laboratory conditions and are to be used only for fenestration product comparisons and as input to thermal performance analyses that also include solar and air leakage effects.