According to Boverket, the contribution of energy-saving technologies to the improvement of energy performance may be included in the calculations based on the technology's demonstrated energy savings. Enduce E1 energy recovery rate of 71-75 % is verified by RISE 2022. The test report is available under Documents in the main menu.
The Swedish National Board of Housing, Building and Planning's regulations BFS 2027:6 (Boverket's regulations amending the Board's regulations and general advice (2016:12) on the determination of the building's energy use during normal use and a normal year) contain the following wording under table 2:2:
'Energy for domestic hot water according to Table 2:1 and Table 2:2 may be corrected for installation technical solutions that can be demonstrated to save energy for domestic hot water.
This allows for the inclusion of heat recovery in different ways, according to the text of the general advice. However, the domestic hot water energy in the tables should always be the same, i.e. 20 kWh/m2 and year for detached houses and 25 kWh/m2 and year for apartment buildings. It is the energy supplied for domestic hot water production that should be calculated taking into account heat recovery in this case.
