| || |
|Vital Stats |
|Location: Columbia City, Seattle |
|Star Level: 5-Star |
|Checklist: Single-Family New Construction Checklist |
|Verifier: Tadashi Shiga, Evergreen Certified |
|Section ||Points |
|Site and Water ||175 |
|Energy Efficiency ||266 |
|Indoor Air Quality ||117 |
|Material Efficiency ||104 |
|Total Score ||772.2 |
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Dwell Development does it again, this time completing the first net-zero energy speculative home in the Seattle market. The Dwell Development team decided to take sustainable building to the next level with this project. The vigorous combination of Passive House standards, innovative recycled materials and solar technology helps the 1,711 square-foot home achieve net-zero energy usage.
The home utilizes passive solar gain to heat itself and create an airtight envelope to prevent warmth from escaping through cracks and leaks in the structure. The Prosoco Cat-5 air and water resistive barrier in combination with the high-performance European windows and doors work to create an airtight seal around the home. The heat recovery ventilation system exhausts stale air from inside the home while providing a continuous flow of fresh air, ensuring a healthy and comfortable environment.
A 6.1 kW solar array completes the home's 5-Star innovation, adding its energy production on top of the home's efficiency to make the building net-zero. The estimated earnings from the system - a result of utility savings and the Washington State paid incentive - will be over $5,000 a year!
The building materials are working hard for the environment too. Cork, an unconventional building material in the United States, has been used in other parts of the world for centuries due to its long-term durability and carbon negative properties. The low maintenance 3-inch thick cork panels never have to be painted, stained or treated and provide additional insulation. As if that isn't compelling enough, cork is also one of the only materials on earth that can be submerged in liquid for centuries without rotting, making it virtually immune to the Pacific Northwest's damp climate.
Other environmentally conscious decisions were made throughout the material selection process, from the 85% recycled countertops from local supplier NovuStone, to the 70% recycled porcelain tile in the bathrooms and sustainably harvested fir floors placed throughout the home. With the incorporation of recycled materials and sustainable technology, this net-zero speculative home is the future of residential development.
Click on an image to enlarge - Photo Credit: Tucker English