This document provides a calculation method for the thermal resistance and heat transfer coefficient of building components and building units, but does not include doors, windows, other glazed components, curtain walls, components for ground heat transfer, and components designed for ventilation. This calculation method is based on the appropriate design thermal conductivity or design thermal resistance of materials and products related to the application. This document applies to building components and units composed of thermal homogeneous layers (which can include air layers). Appendix F of this document provides an approximate calculation method for non thermal homogeneous layer components containing metal fasteners, but it is not applicable to insulation layers with metal thermal bridges. Note: According to the modular settings specified in 1SO 52000-1, Table 1 in the introduction provides the relative positions of this document in the EPB series standards. 2 Normative References The content of the following documents constitutes an essential clause of this document through normative references in the text. Among them, for dated references, only the version corresponding to that date is applicable to this document; For undated references, the latest version (including all modification orders) applies to this document. ISO 7345 Thermal performance of buildings and building components Physical quantities and definitions ISO 10211 Thermal bridges in building con construction Heat flows and surface temperatures Detailed calculation ISO 10456 Building materials and products, claimed values Building materials and products Tabulated design values and procedures for determining declared and design values ISO 13789 Thermal performance of buildings, heat transfer coefficient and ventilation coefficient, calculation method ISO 52000-1:2017 Building Energy Efficiency EPB Assessment System, Part 1: Overall EPB Assessment Part 1: General framework and procedures Note 1: Except for 1SO 52000-1, the default EPB reference file is determined by the EPB module code and provided in Appendix A (Table A.1) and Appendix B (Table B1), with examples. EPB module code: M5-5 or M5-5,1 (if M5-5 is subdivided), or M5-5/1 (if specific chapters and clauses in file M5-5 are referenced). Note 2: This document does not refer to the terms of other EPB documents. The above statements and annotations are intended to maintain consistency in the EPB series of documents