Efficiency Times Two

Efficiency Times Two

This cohousing duplex in Washington State generates enough solar energy for two families, plus their electric cars.
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#ICF and #SIPs duplex in Bellingham, WA generates enough #solar energy for two families, plus their electric cars. http://3bl.me/5dsdmn

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Bellingham Power House. Photo Courtesy of Rachel M. Lee for TC Legend Homes

Green Builder Home of the Year Awards - Best Alternative Construction

Green Builder Media

Tuesday, January 26, 2016 - 7:00am

BELLINGHAM-BASED design/build firm TC Legend Homes loves to build overachieving homes. The firm’s latest project features a 9.9-kW PV array, which not only produces enough solar electricity to meet its own energy needs, but will produce surplus power to charge two electric cars. Nicknamed the Power House, the home has earned a HERS Index score of -15. It is the first of its kind in Whatcom County.

An airtight shell was built using insulated concrete forms (ICFs) and structural insulated panel (SIP) construction for the above-ground walls and roof. Numerous south-facing windows and passive solar design work in tandem with a highly efficient heat pump, solar hot water and a solar PV array to achieve better than net-zero performance.