Archive for September, 2010

Thanks for attending the open house

September 19th, 2010 by Tim Delhey Eian

Passive House in the Woods open house crowdPassive House in the Woods, people waiting in line to get in

Thanks for joining the over 600 people who came to visit the Passive House in the Woods yesterday. We had a great time showing you the home on this picture-perfect day. We hope that you found the event informative and entertaining. We’ll continue to post updates on the building on this website.

Passive House in the Woods Design Team

Passive House in the Woods Design Team


Open House Tomorrow!

September 17th, 2010 by Tim Delhey Eian

Please join the design team and Midwest Home for a public open house at the Passive House in the Woods tomorrow from 1 – 4 pm. We look forward to showing the home and explaining how it can stay warm without a furnace or boiler, and how it makes more energy than it consumes.

Passive House in the Woods, rear stairwell

Rear stairwell


Power Plant Online [Update]

September 14th, 2010 by Tim Delhey Eian
Passive House in the Woods Photovoltaic Tracker

Photovoltaic Tracker

Passive Houes in the Woods, solar panels on the roof

Solar thermal panels on the roof

We are happy to announce that the solar photovoltaic system at the Passive House in the Woods produced the first 1/2 kWh of electricity yesterday. Both the solar electric and solar hot water systems will help this home achieve carbon-neutral operation and offset its footprint.

[Update] Midway through day 2 of operations, the PV system has now generated in excess of 50 kWh. It is exciting to see the power generation meter spin up and start to offset the consumption meter!


Midwest Home Magazine Open House & Educational Tour

September 14th, 2010 by Tim Delhey Eian

Join Midwest Home magazine and the design team for the Passive House in the Woods for an educational tour at one of the most energy efficient residences in the U.S.

Saturday, September 18, 1-4 pm

FREE – no tickets or reservations needed!

908 Kirkwood Way North, Hudson WI 54016

The Passive House in the Woods is one of a very few Passive House structures in this country. This unique construction process is the most stringent energy standard in the world. No furnace is necessary. This fascinating house of the future is being built with today’s technology.

Directions and parking see


PHitW listed on “Built Passive Houses” website

September 14th, 2010 by Tim Delhey Eian

Passivhausprojekte Screenshot

The Passive House in the Woods project is now listed on the “Built Passive Houses” website. This page holds a lot of specs about the building and is a great resource for built Passive House projects around the world.


Upcoming Events

September 12th, 2010 by Tim Delhey Eian

We just posted all upcoming events on the left hand side of this page.

We invite you to join us at one of the open houses in the upcoming month and experience this this one-of-a kind blend of design and performance. The Passive House in the Woods can be heated with 2 hair dryers, it is incredibly air-tight and super-insulated. It makes more energy than it consumes, and it offers stunning views of the St. Croix River valley—all a stone’s throw from the Twin Cities. Experience  We will see you at the house.


Prep for Midwest Home Open House

September 12th, 2010 by Tim Eian

Passive House in the Woods interior renderingPassive House in the Woods interior rendering 2

This week has been full of activity – inside and out. There seems to be a craftsperson or contractor in every room as we near the big finish for the upcoming Midwest Home Tour. The Passive House is being sponsored by Midwest Home as a wonderful example of green living. The free tour takes place on September 18th from 1-4. Many of the house’s sponsors are working hard to have the house in tip top shape.

As the project nears completion, the design we created seems to materialize right before our eyes. The USON tile was delivered this week and is currently being installed in all three bathrooms. The wood floors, cabinets and counter tops are in. Lighting and furniture will be installed this next week. As these items are installed the project moves quickly from a work site to a living environment.nEven our patios and decks will have furniture to enjoy the vast St Croix views.

As with all projects, there is much to be accomplished in the last couple of weeks. I have included two renderings completed by Erin Heikkinen, a designer at InUnison Design, Inc. They demonstrate the design concept of this wonderful home and give a taste of what you will see when you visit the Passive House in the Woods.


Final Blower Door Test

September 4th, 2010 by Tim Delhey Eian

Gary Nelson from the Energy Conservatory was gracious enough to perform the final blower door test today. We used the Minneapolis blower door with a duct-blaster and Tectite Software—following the PHIUS protocol and the DIN EN 13829 norm. The house performed better than during the rough-in test, which was to be expected since added finishes and completed window assemblies add to the tightness of the home.

The averaged result: 68 CFM50 leakage, or 0.25 ACH50.

Gary Nelson and the Minneapolis Blower Door

Gary Nelson and the Minneapolis Blower Door

Gary Nelson explaining the Tactite software

Gary Nelson explaining the Tectite software

Both blower door tests have been a fun learning experience for the team and a big success, since the house performed remarkably better than the Passive House limit of 0.6 ACH50.

Passive House in the Woods blower door test

The team is watching the numbers projected on the wall

For those who think in CFM leakage numbers, the house averaged 70CFM—75 depressurized (0.28 ACH50), and 60 pressurized (0.22 ACH50). For those who could care less 😉 this is a really, really tight house.


Site impressions

September 3rd, 2010 by Tim Delhey Eian


Midwest Home Magazine

Platinum Sponsors

TE Studio

InUnison Design

American Standard



Partners 4 Design


Room & Board

Gold Sponsors

Peak Building Products

Chad Holder Photography

Crystal Cabinets

Warners’ Stellian

Silver Sponsors

Built Environments




Granite Tops





Bronze Sponsors

Energy Concepts

American Clay

Coldspring Granite

Hunt’s Carpet Service


St. Croix Electric