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The RMI Headquarters is a 4,000-square-foot experimental bioshelter in Colorado designed for extreme resource efficiency. It utilizes passive solar design, superinsulation, and advanced glazing to eliminate the need for a conventional heating system, achieving a 99% reduction in space- and water-heating energy. The structure integrates a residential home, a year-round greenhouse for food production, and an office space. Key technologies include krypton-filled Heat Mirror windows, a 1,500-gallon superinsulated water storage tank, and a combination of grid-interactive and stand-alone photovoltaic systems. The document details the building's construction, including its 16-inch thick masonry walls with polyurethane foam cores, and provides economic data showing that the efficiency investments paid for themselves in approximately ten months based on 1983-84 technology.