DIN EN 12831 Bb.2:2012 Heating systems in buildings - Method for calculation of the design heat load - Supplement 2: Simplified method for calculation of the design heat load and the heat generator capacity
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