Ultra-Low Passivhaus Energy Standard Met by Dwell Development’s Columbia Station Micro-Community

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The first spec home in the Pacific Northwest to meet Passivhaus standards is in the Columbia Station green micro-community built by the award-winning design+build boutique firm, Dwell Development. Passivhaus is an energy standard that is more difficult to achieve than LEED with respect to energy efficiency. Homes that meet the Passivhaus standard must reach thermal comfort levels by postheating or postcooling fresh air without necessitating recirculation.

“We made the committment to building a Passivhaus on spec because we believe so strongly in creating energy efficient homes and keeping them affordable,” said Dwell Development principal, Anthony Maschmedt, in a recent press release. “It’s paying off now. The home pre-sold in November 2012, in the early framing stage of the project.”

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In mid-February, Dwell conducted a blower door test that “resulted in 0.58 ACH50, or .58 air changes per hour under 50 pascals of pressure.” By comparision, regular code homes change air at a rate of around seven times per hour under 50 pascals of pressure. Energy Star standards permit up to 5 or 6 air changes per hour.

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The three-bedroom, 2.5 bath home is part of Columbia Station’s Phase 4 and features a super-insulated building envelope, heat recovery ventilation, airtight construction, reduction and elimination of thermal bridging, high-performance windows, and a reliance on passive heat sources with the aim of reaching 90 percent efficiency.

Ultra-Low-Passivhaus-Energy-Dwell-Kitchen

 


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  • Sea Wolf

    This blog has gone way, way downhill in the past year. This looks like a great project, but the report is weak. No mention of the project’s location? At least this post has a link. The last few . . . none.

  • Sea Wolf

    This blog has gone way, way downhill in the past year. This looks like a great project, but the report is weak. No mention of the project’s location? At least this post has a link. The last few . . . none.

  • Robert Hawthorne

    Nice project, but it’s not the first spec Passive House in the Northwest. The CoreHaus in Portland was built and sold in 2010.

  • http://twitter.com/robharrisonAIA Rob Harrison AIA

    Dwell is doing some great work in Seattle but….it’s not the micro-community as a whole that will be certified as a Passive House if they pass the final blower door test when the house is complete, but one house within a development of about 15 houses, and the house pictured in this post is not the Passive House. Oops. Reporting on Passive House projects ought to include mention of the Passive House consultant, in this case Brute Force Collaborative.

  • http://www.facebook.com/philip.oleary Philip O’Leary

    i visted them they are near my parents home. very nice community rainer vista is basicly a example of what happens when goverment and private industry are on the same page and what they can do right with lots of discipline

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