Rebecca Cox | Paul StovesandFinalist: The 99K House CompetitionThe 99K house is all about efficiency. Through the use of common building practices, standard materials, thoughtful space planning and sustainable strategies, the 99K house offers families an affordable, functional, energyefficient home with a high quality of design. The shape of the house was determined by the need for a dense and compact design. A two-story home allowed for the most efficient use of site and material by reducing the building footprint and roof run-off, minimizing site disturbance and maximizing our stack ventilation strategy for the fall and spring. The 40-foot oak creates shade for the small footprint, and deep overhangs on the south block direct sun during the summer, thereby reducing the cooling load. Conversely, in wintertime the bare tree and lower azimuth permit solar heat gain along the darkly painted south façade, minimizing heating requirements. During the months of April, May, October and November, stack ventilation and cross-ventilation breathe fresh air into the interior spaces and improve indoor air quality. The house is insulated by 100 percent recycled newspaper within certified wood framing; however, the design team also recommends, if budget allows, using Agri-board, a pre-engineered panel system with a core of insulating straw. The home’s additional green features promote healthy living for its occupants. A composting bin and a cistern are provided for the vegetable garden in the back yard so the owner can produce homegrown organic vegetables. A light monitor with self-sealing fan provides daylighting for interior spaces as well as natural ventilation.
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