I have the usable floor area from the energy performance certificate, which is 277 square meters. Is the heated building volume then roughly three times that? So approximately 831 cubic meters?
This is not about a 100% precise calculation, just an estimate.
This is not about a 100% precise calculation, just an estimate.
However, none of this is related to the heating load, as it is calculated according to DIN/TS 12831. Therefore, it is not part of the thermal insulation verification or energy certificate. (The current standard here is DIN 18599.) The total room heating load (mechanical and electrical building services) can therefore be up to 30% above the building heating load after an energy consultation, since they serve completely different purposes.