Product Review from Environmental Building News
July 1, 2007

Enertia Double-Envelope Home Still Has Problems

Those who remember the 1970s houses with two parallel exterior walls and an airspace between them circulating solar heat around the house may be doing double-takes in response to the Enertia house. A double-envelope house design by Enertia Building Systems has been buoyed by the 2007 Modern Marvel of the Year award from the History Channel (cosponsored by the U.S. Patent and Trademark Office) and attention from green lifestyle websites. Although the company, based in Youngsville, North Carolina, has built only about 80 homes in its 22-year history, according to Enertia inventor Michael Sykes, it is positioning itself for greater production.
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