At the NESEA Building Energy Conference in March, the winner of the MA Zero Net Energy House contest was announced. It is the Stephens/Clarke Residence in Montague, MA which was built by Bick Corsa. The 1152 square foot, 3 bedroom house cost $180,000, was monitored from January 1, 2009 to January 1, 2010, and produced two and a half times the energy it consumed. This Zero Net Energy House is actually a Positive Net Energy House.
The house is highly insulated, with R42 walls, R100 ceiling, and stands on an R30 insulated slab. It is powered by 4.94 kW of solar electric panels, solar air and hot water heaters, and passive solar heat gained through U-.17 windows (about R 5.8, according to my calculations). There is a mini-split air source heat pump serving as a furnace and demand hot water heaters as back-up in case it’s needed.
The house used 1,959 kilowatts for the entire year with an annual energy bill for heating, cooling, hot water, cooking, appliances, and lighting of $392. They sold 2,933 kilowatt hours worth $586 back to the grid over that same period.
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