DOE Tour of Zero: Reclaimed Modern by Dwell Development
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Dwell Development built this 3,140-square-foot home in Seattle, Washington, to the performance criteria of the U.S. Department of Energy Zero Energy Ready Home (ZERH) program.
This three-story modern urban in-fill home achieved all of the certifications of the DOE Zero Energy Ready Home program as well as a 5-star rating from the Snohomish and King Co. Master Builders Association’s BuiltGreen program.
Energy-saving advanced framed walls use 2-by-8 framing filled with dense-packed cellulose (R-27). The OSB sheathing was covered with a fluid-applied asphalt weather-resistant barrier that was also used for window flashing. The wall assembly was finished with reclaimed metal and fiber cement siding.
The 7.39 kW of solar electric panels are mounted to the standing seam metal roof.
A thermoplastic polyolefin roofing membrane provides water protection on the flat and sloped roofs.
Pervious gravel helps to manage water runoff in the outdoor living spaces around the home.
The home’s slab-on-grade foundation is wrapped in R-20 of XPS rigid foam insulation.
The three-story home’s balanced fresh air system uses a continuously operating heat recovery ventilator (HRV) that is separately ducted to provide fresh air to every room and exhaust air from the bathrooms and laundry.
The stained concrete floors provide thermal mass, absorbing heat from south-facing windows and releasing it back into the rooms at night.
Every faucet in the home is EPA WaterSense-rated for water savings.
The home's comprehensive indoor air quality system includes no-VOC-rated paints and finishes. Countertops use recycled glass to enhance the home's resource efficiency.
The home’s high-efficiency appliances include an ENERGY STAR-labeled refrigerator, dishwasher, and clothes washer.
All of the home’s lighting is energy efficient, including a mix of 20% LED and 80% compact fluorescent light fixtures.
The home uses ultra-efficient windows with triple-pane glass filled with argon gas, PVC-frames, and advanced low-emissivity coating that lets in visible light while retaining heat in winter and blocking unwanted solar heat in summer.
All of the home’s plumbing fixtures are WaterSense labeled, providing energy and water savings.
The high-efficiency endless hot water system uses a 93% efficient tankless gas water heater.
ENERGY STAR ceiling fans provide cooling air movement while reducing the need for refrigerant-based air conditioning.
The high-performance insulation system includes dense-packed blown cellulose in the advanced-framed walls (R-27) and attic (R-70 to R-90).
The fluid-applied asphalt coating provides a weather-resistant, moisture-resistant layer around the house, serving as a continuous drainage plane and flashing for window and door openings.
“We expect to have almost no net electricity usage for the year due to the solar panels on the roof.”
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“We love living in our home. It is super comfortable, has a ton of natural light, and feels connected to its environment ... We expect to have almost no net electricity usage for the year due to the solar panels on the roof, but even in the darker months when we are hardly generating any solar, our electricity bill is not much more than our old house (built in 2008 and about 40% smaller). Gas usage is only 10% more (during the cold months) and water usage is about the same, which is quite amazing considering the size difference.”