The Bauherren-Schutzbund (BSB) has commissioned a short study entitled "The ten most common mistakes in the new construction and renovation of EFH and ZFH with heat pumps (avoid)" from the Institut für Bauforschung. This shows what builders of single-family houses (EFH) and two-family houses (ZFH) must pay particular attention to and how mistakes can be avoided. According to the BSB, the...