The client desired their retirement home to have warm, yet open spaces filled with natural light, and taking advantage of the spectacular natural views; to the southwest a lush, steep ravine, to the northwest a panoramic lake. The siteing, and relatively mild climate allowed for passive heating and cooling strategies via sun and site orientation (large overhangs to the south and west), a geothermal loop, and thermal lag; mass walls to the south, and a massive stone chimney acting as a "sunspace" which gathers radiation through the southern & western clerestoreys, filtering it in the spring & fall, and re-radiating it on those cold winter nights. Operable clerestorey glazing allows stack venting during the warmer days. NEXT--->