The homes are earth-friendly in their efficient design—packing three bedrooms and three baths into 1,788 square feet—and in their use of eco-oriented elements such as formaldehyde-free insulation (Johns Manville, [XLINK "http://www.jm.com" "www.jm.com"]), low-emissivity window glass (Pella Windows and Doors, [XLINK "http://www.pella.com" "www.pella.com"]), a tankless water-heating system (Rinnai Corporation, [XLINK "http://www.foreverhotwater.com" "www.foreverhotwater.com"]), and fiber-cement siding (James Hardie Siding Products, [XLINK "www.jameshardie.com" "www.jameshardie.com"])—not to mention the photovoltaic panels (Kyocera Solar, [XLINK "http://www.kyocerasolar.com" "www.kyocerasolar.com"]).

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