GB/T 20311-2021 Active National standards

GB/T 20311-2021 Building components and building elements—Thermal resistance and thermal transmittance—Calculation methods

Publish Date: 2021-08-20 Implement Date: 2022-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 20311-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Insulation, sound-absorbing, lightweight, and fire-resistant materials

ICS Name: The insulation of buildings

Publish Date: 2021-08-20

Implement Date: 2022-03-01

Pages: 34 pages

Scope

This document provides a calculation method for the thermal resistance and heat transfer coefficient of building components and units, but it does not include doors, windows, other components with glass, 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 is applicable to building components and units composed of thermally homogeneous layers (which may include air layers).
Appendix F of this document provides an approximate calculation method for components with non-thermally homogeneous layers containing metal fasteners, but it is not applicable to insulation layers with metal thermal bridges.
Note: According to the modular setting specified in ISO 52000-1, Table 1 in the introduction shows the relative position of this document in the EPB series of standards.