The Norwegian IEA Task XIII house.

The Norwegian solar low energy dwelling developed within Task 13 of the International Energy Agency's Solar Heating and Cooling Programme, is a two-storey row house apartment of approximately 120 m² floor area. The IEA dwelling is being constructed at Hamar, 120 km north of Oslo, and it will be used for media personel lodging during the Winter Olympics in 1994. The IEA dwelling will be superinsulated, with U-values of 0.11, 0.14, and 0.13 W/m^2.K for roof, walls and floor respectively. A new generation of superwindows is employed, featuring 4 glass panes and insulating edge spacers. With a very efficient ventilation heat recovery system, the calculated space heating load is only about 25 kWh/m².a. Space heating and water heating is provided with a heat pump which uses the sunspace in the house, and a ground coil as heat source. The dwelling is also equipped with a grid-coupled photovoltaic system. The calculated purchased electricity amounts to 25 kWh/m².a.