DOE Tour of Zero: Contemporary Prefab by Unity Homes
You are here
Unity Homes built this 1,758-square-foot custom home in Walpole, New Hampshire, to the high performance criteria of the U.S. Department of Energy Zero Energy Ready Home (ZERH) program.
The owners of this energy-efficient home can expect to save $2,200 per year in energy costs compared to a home built just to code.
The wall panels for the home were constructed in a factory.
South-facing windows bathe the great room in natural light.
The triple-glazed, low-e2, tilt-and-turn and casement windows (U-0.20, SHGC-0.46) have strong insulating capabilities while letting in significant light for solar heat gain.
The kitchen is equipped with high-efficiency appliances.
The high-efficiency air-source heat pump (9.5 HSPF, SEER 17.3) has two indoor air handlers: one ductless and one ducted to provide heating and cooling throughout the home.
The walls were constructed of 9.5-inch I-studs then dense-packed with cellulose insulation and sheathed with a 5/8-inch coated OSB product on the exterior and a ½-inch OSB on the interior. A 1.5-inch service cavity was constructed to the interior of that and surfaced with 5/8-inch drywall to provide space for wiring and electrical boxes without disrupting the wall air barrier.
The walls and floors of the home were constructed in a factory and brought to the site for quick assembly.
The walls of the crawlspace were insulated with 3 inches of XPS rigid foam (R-15) and an additional 3 inches of rigid foam covered the ground under the entire crawlspace slab.
“I could say that it is comfortable, that it is quiet, that it feels calm, peaceful, secure, and all that would be true, but it would miss the point. It is the feeling that I don’t want to be anywhere else.”
Click on the box to learn more.
“Every morning when I walk up the stairs from the bedroom to the living area I am struck by [the home’s] beauty. [It] is not visual ... It is a felt beauty. I could say that it is comfortable, that it is quiet, that it feels calm, peaceful, secure, and all that would be true, but it would miss the point. It is the feeling that I don’t want to be anywhere else.”