DOE Tour of Zero: Lake Knowles by e2 Homes
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E2 Homes, LLC, built this 3,912-square-foot home in Maitland, Florida, to the performance criteria of the U.S. Department of Energy Zero Energy Ready Home (ZERH) program.
Photo courtesy of e2 Homes
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Concrete and pervious stone replace lawn for minimal water use and low-maintenance landscaping.
Photo courtesy of e2 Homes
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All of the interior and exterior lamps are energy-efficient light emitting diode (LED) lighting.
Photo courtesy of e2 Homes
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Board-form concrete walls are insulated along the inside with rigid foam providing an insulation value of R-19, while the unvented roof is insulated on the underside with R-21 of spray foam.
Photo courtesy of e2 Homes
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Durable concrete walls, thermoplastic polyolefin (TPO) roofing, protective overhangs, and pervious stone ground cover all increase the home’s resistance to tropical storms.
Photo courtesy of e2 Homes
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Deep overhangs protect most of the windows from direct overhead sun while low-emissivity coatings on the glass help block heat transmission into the interiors.
Photo courtesy of e2 Homes
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A 10-kW photovoltaic electric generating system installed on the roof helps save homeowners an estimated $2,850 in energy bills annually compared to a home built to code.
Photo courtesy of e2 Homes
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The home was equipped with a high-efficiency ENERGY STAR refrigerator and dishwasher for energy and water savings.
Photo courtesy of e2 Homes
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All interior lamps are energy-efficient light emitting diode (LED) lighting.
Photo courtesy of e2 Homes
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The home meets the requirements of the U.S. Environmental Protection Agency’s Indoor airPLUS certification including the use of structural wood products, primer, paint, cabinets, and flooring that emit no or few air contaminants.
Photo courtesy of e2 Homes
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The home’s geothermal heating and cooling system uses the moderate temperatures below ground to provide very efficient space conditioning at a cooling energy efficiency ratio (EER) of 26.7.
Photo courtesy of e2 Homes
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The home was equipped with water-saving, efficient plumbing fixtures.
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The home’s geothermal heat pump uses heat removed from the home to preheat domestic hot water, which is further heated by a heat pump water heater.
Photo courtesy of e2 Homes
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An ultra-efficient geothermal heat pump heats and cools the home and preheats water for the heat pump water heater.
Photo courtesy of e2 Homes
“In a world with ever-increasing energy costs, global warming, and the need to wean ourselves from fossil fuels, my wife and I were so happy to have … a builder who was able to guide us in building our energy-efficient home. ”
“In a world with ever-increasing energy costs, global warming, and the need to wean ourselves from fossil fuels, my wife and I were so happy to have found a builder who was able to guide us in building our energy-efficient home. From the beginning, Rob Smith suggested several smart energy-efficient options to incorporate in our home, that would allow us to see a return on the investment, including a geothermal heating and cooling system and a 10kw photovoltaic solar array on the roof.”
– Homeowner
