Controlled central ventilation system with heat recovery in prefabricated houses. Kontrollierte luftung mit warmeruckgewinnung in einem fertighaus.

Reports on use of supply and exhaust ventilation with heat recovery in prefabricated houses and multi-storey buildings. In thermal super insulated buildings the system can supply heat demand down to an outside temperature of5 degrees C: additional electric storage heating is used below thistemperature. The ventilation system operates at an air change rate of approximately 0.7 per hour in the following way: exhaust air from the kitchen, bathroom, and WC, supply air to the living and bedrooms. It is combined with an air to air heat pump. The objectives are to produce as simple and efficient systems as possible and to reduce costs, in order to create a market for such energy conservation systems.