The proposed low-energy house is located on a quiet street in the Rondorf area of southern Keln, surrounded by cottages and a small path to the site. The zone around the house is set with a bracelet. Gas central heating 53 kWh per m2. Vailant ' s heating system, with a leaking water heater, of the " Hot Floor " system, Judo Bioquell ' s internal and external windows of natural stone, satellite television floor: brown tile in the basement, beige on 1st floor, top floor - laminated on the third floor of the integrated cupboards, ceiling height 4 m