Development and Investigation of a Combined Ventilation and Floor-Heating System.

The continual reduction of the transmission heat losses of residential buildings causes an increasing importance of the ventilation heat losses. Energy saving can be achieved by using a mechanical ventilation system with heat recovery. A great improvement is the combination of heating and ventilation in one system. In this project such a combined system was developed to reduce the energy consumption of the fans, the operating expenses and also the investment costs in comparison to existing systems. In future a high market acceptance is expected for combined heating and ventilation systems. Extensive long timeinvestigations are made for optimization and determination of general operating parameters. The improved results can also be considered as fundamentals of simplified dimensioning-and calculation proceedings.