EC-THERMIE project Heerlerbaan: multifunctional appliances for retrofitting residential buildings.

Many post-war residential buildings in the Netherlands have collective heating systems with poor energy efficiency. Also ventilation and DHW systems usually do not comply with current requirements. In Heerlen, the Netherlands, a demonstration was carried out in the framework of the EC-THERMIE programme in a residential building where the collective heating, DHW and ventilation systems are replaced by individual multi-functional appliances. These appliances are a recent development in the Netherlands, integrating different service functions. A measurement and evaluation programme was completed in May 1997, showing energy savings for space heating of 48% over a period of 2.5 years and a significant improved ventilation and indoor air quality.