Germany
- Test site no. 1: One-family house, Düsseldorf
- Test site no. 2: One-family house, Allmendingen
- Test site no. 3: One-family house, Bedburg-Hau
- Test site no. 4: One-family house, Buchenbach
- Test site no. 5: One-family house, Gengenbach
- Test site no. 6: One-family house, Merzig
- Test site no. 7: One-family house, Mittenwalde
- Test site no. 8: One-family house, Remagen
- Test site no. 9: One-family house, Ruhpolding
