Detailed information on saving energy
Convenience ventilation systems with heat recovery by means of cross-counter-current heat exchangers can be taken into account in the energy saving ordinance (EnEV) with a general heat provision level of, for example, 80%.
According to the EnEV, with such a system the yearly heating requirement can be reduced by 17.2 kWh/m²a and, depending on the selected system technology, primary energy of 25 kWh/m²a, for example, saved. This already takes into account the power consumed by the fans at a general rate of 2.3 kWh/m²a.
If the general calculation is insufficient, you can receive the technical details from Pluggit for a detailed calculation.