3. Assessing the performance of thermal insulation systems

norme ISO 12241 – Juin 2022 , entitled "Thermal insulation of building equipment and industrial plants – Calculation methods", provides methods for calculating the heat transfer properties of building equipment and industrial plants, mainly in steady-state conditions. It also provides a simplified approach to calculating thermal bridges.

In order to standardize the insulation selection process, classes have been defined for insulation materials used in both water and air networks. The purpose of these classes is to define insulation performance according to the material used, depending on the installation and its requirements. In this case, most insulation work is carried out using class 3 or 4 materials. According to