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house which could be built as a two or three bedroom, one and a half or two and a half bath house. The passive solar design incorporates an earth mass storage system with near total north and south wall area plenums for heat collection and distribution. Total building area is 1550 square feet, providing a net floor area of 1250 square feet.
To achieve lowest cost feasible, building materials and solar heat system components were selected for lowest initial cost with 20 year or greater life expectancy. Double walls of low cost insulated glass, sliding doors and windows perform functions of solar collectors, while heat distribution is achieved by natural thermal convection through plenums. An active solar domestic hot
93.9%