Annex 32

Economical Heating and Cooling Systems for Low Energy Houses

Heating energy demand of highly insulated, air tight dwellings with high glazing fraction has reached very low values down to about 15kWh/(m2・a). However, due to the building features, there may be a need for comfort cooling in summertime. Heat pumps are favorable heating systems for these building types due to small power layouts and the possibility to heat and cool with the same unit. Main objective of the Annex is to evaluate different system solutions for the building needs heating, domestic hot water and cooling in low energy houses in order to minimize overall energy use and costs and to develop guidelines for the design and control of these systems.