The Everhart Passive House Project
Portland, Oregon Passive House Futurefit: An Everhart Family Home
Welcome to the Everhart Passive House Remodel Website. We are glad you came by for a visit. Our site, like our home, is not 100% finished, but we hope you will find inspiration and information here about passive house designing and low-carbon heating and cooling of buildings.
What is a Passive House?
A Passive House is a very well-insulated, virtually air-tight building that is primarily heated by passive solar gain and by internal gains from people, electrical equipment, and cooking.
What Makes a Passive House Special?
- A Passive House is about ten times as air tight as typical new construction.
- It is heavily insulated to keep warm/cool air in. Our walls are 11 inches thicker than they were, as built to code in 1998.
- Instead of fresh air coming in through cold leaks, fresh air is constantly brought in by a Heat Recovery Ventilator that captures 80% of the heat of the outgoing stale air.
- Thanks to capture of the heat energy, a Passive House can stay warm simply from everyday sources such as sun through the windows, body heat, appliance operation heat, cooking, and, for example, 2000 watts of supplemental heat for the coldest days in Portland, Oregon.
- There are over 10,000 of these homes in Europe, so it is not as space-age as you might think.
- It is an elegantly simple standard to meet to be a certified passive house—one air-tightness measure with a blower-door test, and one measure of the heating/cooling energy use per square foot of living space. Now, HOW to reach these benchmarks is a big complicated story…welcome to our website.
Here are PDF versions of presentations for you to download and enjoy. Please respect the integrity of the Passive House Project and do not share or repost for profit. Thanks! Questions can be directed to Tad Everhart.
- Futurefitting Our Home: Future Energy Conference, Portland, Oregon on April 27, 2012 (PDF file is 5MB)
- PH nw Passivhaus Presentation (PDF is 13MB)
So, How Much Energy DO You Save?
I know you want to know the facts, so here they are. The red line is the average use (in therms) before the retrofit; the blue and green lines are 2010/11 and 2011/12, respectively.
Click on the image to see the full-sized graph (it is a PDF file, so depending on your browser settings, you may download it by clicking or right-clicking and choosing "Save Target As...").
For more information, please see:
- The Passive House Northwest website.
- Links to other Passive House websites, resources, articles and additional information in Website Links
- The newly published book "Recreating the American Home"
- The impressive repository of information at the Passive Houses Directory
Questions? Comments? Please Contact us.
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