Top 100 Products 2012 Unity Homes, by Bensonwood
Photo: Courtesy of Bensonwood
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Building Products: Fab Prefab

Unity Homes, by Bensonwood
You expect factory-built homes to be efficient, but this one goes way beyond the norm, without breaking the bank. Cellulose-insulated wall and roof panels, each more than a foot thick, boast triple-pane windows and an airtight seal, which translates into energy usage that's just one-fourth that of a typical home.

Starting at less than $200,000 for a 1,000-square-foot cottage; unityhomes.com
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