The Hodges Residence is a superinsulated direct gain passive solar home in Ames, Iowa (latitude 42.0°N, longitude 93.8°W). The architect was David A. Block, A.I.A., and the solar system was designed by Block and Laurent Hodges. The home was designed in 1978 and built in 1978–1979; it was a winner in the 1978 National Passive Solar Residential Design Competition. A notable feature of the home was its innovative use of concrete cored slabs as heat storage. The home has been occupied for ten years and has proved to have a very low Home Heating Index of less than 0.7W/°Cm2(3 Btu/°-Fday ft2). The performance of the home during its first ten years of occupancy, its economics, and occupant reactions are described.