ISO 6946:2017提供了建筑构件和建筑构件的热阻和热传导率的计算方法，不包括门、窗和其他玻璃窗、幕墙、涉及地面热传导的构件，以及设计用于空气渗透的构件。 计算方法基于适用于相关应用的材料和产品的适当设计热导率或设计热阻。 该方法适用于由热均匀层（可包括空气层）组成的部件和元件。 ISO 6946:2017还提供了一种近似方法，可通过附录F中给出的修正项，用于包含不均匀层的元件，包括金属紧固件的影响。 用金属桥接绝缘的其他情况不在ISO 6946:2017的范围内。 注:引言中的表1显示了ISO 6946:2017在ISO 52000？1中规定的模块化结构背景下在EPB标准集内的相对位置。

ISO 6946:2017 provides the method of calculation of the thermal resistance and thermal transmittance of building components and building elements, excluding doors, windows and other glazed units, curtain walling, components which involve heat transfer to the ground, and components through which air is designed to permeate. The calculation method is based on the appropriate design thermal conductivities or design thermal resistances of the materials and products for the application concerned. The method applies to components and elements consisting of thermally homogeneous layers (which can include air layers). ISO 6946:2017 also provides an approximate method that can be used for elements containing inhomogeneous layers, including the effect of metal fasteners, by means of a correction term given in Annex F. Other cases where insulation is bridged by metal are outside the scope of ISO 6946:2017. NOTE Table 1 in the Introduction shows the relative position of ISO 6946:2017 within the set of EPB standards in the context of the modular structure as set out in ISO 52000？1.