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The document details the 1984 construction of Amory Lovins's home, which utilized superinsulation, thermal mass, and passive solar design to eliminate the need for a conventional HVAC system. By focusing on functional end-uses rather than standard building codes, the design achieved a 99% reduction in space heating energy and a 90% reduction in electricity use compared to a conventional home of the same vintage. The study highlights that the capital costs of high-performance components were offset by the elimination of expensive heating equipment, resulting in a net construction cost increase of only 1% and a payback period of approximately six months based on 1983-84 prices.