“I want as many people to come into this house as possible. Anyone who reads this can knock on my door and I’ll give them a tour. The whole point is to share and learn from each other, to take ideas from here and do them elsewhere.” – Sonya Newenhouse
With Carly Coulson as the certified Passive House designer. This tiny (968-square-foot) kit house has a treated floor area of 888 square feet (82.5 m²). This project sports local windows and Cardinal triple-pane glass, while the doors are Energate. The NewenHouse is wrapped in a jacket of cellulose – and similarly comes in well under the specific space heating demand.
Carly recently presented the project at the Hannover Passivhaus conference. Here are some of the project specs:
- Space heating demand: 11.4 kWh/m²a (3.61 kBTU/ft²a)
- Primary energy demand: 104 kWh/m²a (32.9 kBTU/ft²a)
- Blower door: 0.51 ach50
- Wall U-factor: 0.09 W/m²K (R-63)
- Slab U-factor: 0.10 W/m²K (R-57)
- Roof U-factor: 0.06 W/m²K (R-94)
- (7,795 HDDs)
The project is also rocking a solar domestic hot water system (Velux) that is expected to provide nearly two-thirds of the domestic hot water needs, and a PV system for site net zero energy.
The project went through BRE in Watford, UK, for Passivhaus certification, is Energy Starcertified, and is expected to hit LEED for Homes Platinum after Landscape verification by the Green Rater Laura Paprocki.
Total cost for NewenHouse – including solar DHW, PV, and accessory structures – is a whopping $173/sf. If there was a LEED Titanium, this über-tiny Passivhaus in an “extreme” environment would surely qualify.
Newenhouse, who aptly describes herself as an eco-entrepreneur, is also founder and president of Community Car LLC in Madison, and just sold the Madison Environmental Group, a business she founded 13 years ago, to an employee. In the next year, she plans to launch a business selling three house designs — a 500-square-foot one-bedroom, an 800-square-foot two-bedroom, and a 1,000-square-foot three-bedroom. An option for a detached stuga, Swedish for “cabin,” includes storage space, a root cellar, sleeping loft, sitting area and wood stove. With her business, Newenhouse says she is trying to bring together three movements: the green building movement, the small house movement and the sustainable- or simple-living movement.
A brief overview of her kit house can be found at http://www.madisonenvironmental.com/documents/NewenHouseHandout_10%2010%2011%20(3).pdf
You can contact Newenhouse at 608-220-8029 or Sonya@madisonenvironmental.com. A link to her blog is on the a at madisonenvironmental.com. Or if you’re planning to drop in, which she says she welcomes, she lives at 422 Hickory St. in Viroqua WI.
Want to learn more about Passive House features & LEED? is hosting a free webinar of another Homeowner’s journey in Michigan who attempted passive house & is on track for LEED Platinum. Missed it? It will be recorded and a 2 hour video series on it’s construction & post occupancy living will be out by Fall. https://greenhomeinstitute.org/education-and-events/a-journey-to-passive-house-leed-homeowners-tale-free-webinar/
This article is a mash up between Joe Orso of the Lacrosse Tribune and Mike Eliason of Green Building Advisor. Their stories can be found here