Second edition of BiH standards BAS EN 12831-1: 2021, Energy performance of buildings - Method for the calculation of the design heat load - Part 1: Space heating load, Module M3-3 and BAS CEN/TR 12831-2: 2021, Energy performance of buildings - Method for calculation of the design heat load - Part 2: Explanation and justification of EN 12831-1, Module M3-3, has been adopted by the translation method through Technical Committee BAS/TC 47, Appliances and systems for heating and refrigeration of the Institute for Standardization of BiH.

The original texts of the European standards were prepared by the Technical Committee CEN/TC 228, Heating systems and water based cooling systems in buildings, whose secretariat is held by DIN.

BAS EN 12831-1: 2021 covers methods for the calculation of the design heat load for single rooms, building entities and buildings, where the design heat load is defined as the heat supply (power) needed to maintain the required internal design temperature under design external conditions.

Technical report BAS CEN/TS 12831-2: 2021 contains information to support the correct understanding, use and national adaptation of EN 12831-1.