An efficient heating and cooling source is an air-source heating pump, a couple of which cover most of this building's needs. Builders say that with a small building, tight and thick insulation, and on-site power production through solar panels, homeowners can achieve or approach a net zero-energy house.
Another way to ensure a tight building envelope is to use casement windows that close tightly.
October 9, 2011 7:27 AM PDT
Photo by: Martin LaMonica/CNET
| Caption by: Martin LaMonica
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