Oregon Shift House Seeks Passive House

Shift-passive-exterior

Last week, Willamette Week Online published an article called "Futurehaus," which we linked to in our Saturday Week in Review.  The article describes an Oregon Passive House project in the works by Root Design Build.  The house is referred to as the Shift House, which, awkwardly enough, is not to be confused with the other Shift Home that we covered recently.  But that's not to take anything away from it.  With construction set to begin next month, upon completion in September, it'll be one of only a few certified Passive Houses in the United States. 

Shift-kitchen

Of course, the media has been giving attention to Passive Houses, and the broader public is becoming more and more aware of the standard.  Passive Houses require three main things: an airtight envelope, little to no heating and cooling energy, and minimal overall energy use.  You can read about the more technical standards on the Passive House website.  

Root Design Build's Shift House maintains a somewhat traditional design, and the necessary energy efficiency goals will be sought by eliminating thermal bridges and using super insulation, roof overhangs, triple-pane windows, south-facing windows, concrete floors for thermal mass, and waste heat, etc.  And with the tight envelope, the home requires a heat recovery ventilator to keep the air fresh. 

Shift House will be just over 1,700 square feet, and Root Design Build has $300,000 budgeted for construction.  Although the home will have solar panels, not counting energy from the panels, the estimated yearly heating cost should be under $200, if all goes as planned.  Very interesting.  We'll keep you posted as the Shift House moves forward …

Shift-passive-interior

Shift-house-side

Shift-permeable

As a side note … it seems popular to couch LEED criticism in praise for Passive House.  Most certainly, LEED could be more rigorous in terms of energy performance, although it should be remembered that the goal of the program is market transformation.  But as has been said by others, LEED and Passive House don't necessarily need to be mutually exclusive.  Moreover, while Passive House zeros in on energy efficiency and tightness, LEED has a broader focus on other important environmental aspects, such as site issues, construction activity, materials and waste, water efficiency, and environmental air quality, etc.  The goals and programs are slightly different.  In any event, you know we'll be the first to tell you if we see a LEED Platinum Passive House. 

Rendering credits: Root Design Build.


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  • http://www.facebook.com/people/Zac-Blodget/508067459 Zac Blodget

    I agree with you completely regarding your final paragraph on LEED. I think that a good goal in moving forward is to follow the LEED guidelines, and substituting the Passivhaus energy guidelines for LEED’s (LEED-H, I mean). LEED is a good system, it’s just a little too easy to cheat.

  • http://www.postgreenhomes.com Chad Ludeman

    I agree with Zac. In my opinion, every “green” or LEED home should be very energy efficient. It is possible with LEED to skip this portion and make it up in other areas.

    Passiv Haus is the ultimate in terms of energy efficiency. Period. ZED or NZE don’t compare as they often rely heavily on renewable energy. Passiv does not take power generation into account at all in their reqs.

    Oh, and this is a nice looking home here. Good work Root.

  • Brian N.

    I agree with all of the above. There is no reason LEED and ‘Passive House’ need to be mutually exclusive. But one would HOPE that efficiency was implicit in LEED guidelines.

    But when that standard is being applied to building of all purposes and sizes, I suppose it would be nearly impossible to fairly compare all the structures using it. Unless there was a formula for “efficiency & sustainability per square foot” LOL

  • http://mportlandrealestate.com/ Portland Real Estate

    That is a very good point to bring up. There are houses that are not LEED certified yet they are passive, and vice versa. Yet there are houses that have both. I think that more designs should try to follow the natural way of life, like the passive heating and cooling. It makes more sense to me to keep the heat that I have in the house, rather than just create new heat (even if it is cheap and green).

  • Emil King

    Great concept for new construction, but where are the resources and a national call for conversion of existing buildings into passive structures? Surely there’s some way to incorporate these features in renovations of older homes.

  • Carole

    I would love to see this house when it’s finished.

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