HEATING ENERGY REDUCTION OF BUILDINGS IN COLD CLIMATES

Normal conventional methods of decreasing energy consumption for the h eating of buildings are: increasing the insulation thickness, reducing the air leakage of buildings, using special low-energy windows, lower ing the room air temperature and recovering heat from exhaust air. Unc onventional methods of reducing the energy consumption and peak energy demand for wall heat losses and ventilation, by using low temperature solar heat sources provided by nature or waste heat without a heat pu mp, that are especially suitable for cold climates are considered. The operation and optimization of these unconventional energy-saving meth ods are analysed theoretically for different Finnish climatic regions (Helsinki, Sodankyla). The peak power demand that occurs during the co ldest days of the year greatly decreases in both regions, which means that the auxiliary heating devices and energy production can be dimens ioned much smaller. Both absolute and relative energy savings increase from southern regions to northern regions.