PASSIVE PERFORMANCE OF THE SASKATCHEWAN CONSERVATION HOUSE.

The Saskatchewan Conservation House, located in Regina, Canada, is a 100% solar heated residence which is primarily heated by passive solar gain and by internal heat generation from normal electricity usage and people. The residence, completed in December 1977, incorporates a tightly sealed envelope, a novel air-to-air heat exchanger, insulation levels that greatly exceed current standards, sun-oriented windows, and insulating shutters on all the windows. On an annual basis, the space heat requirement for the dwelling over and above the passive gain and internal generation amounts to 5. 1 Gigajoules per year (4. 9 Million Btu per year). At current electricity prices in Regina, this requirement could be supplied for 31 per year. For average year conditions, approximately 44 percent of the total space heat requried is provided by passive solar gains, 41 percent is provided by internal gains, and the remaining portion is provided by an active solar system with 17. 8 sq. m. of vacuum tube collectors.