2017DIN EN 12831-1:2017 Energy performance of buildings - Method for calculation of the design heat load - Part 1: Space heating load, Module M3-3; German version EN 12831-1:2017
2003DIN EN 12831:2003 Heating systems in buildings - Method for calculation of the design heat load; German version EN 12831:2003
1970DIN EN 12831 E:1997-08 Heating systems in buildings – Procedure for calculating the standard heating load – National Annex NA