Passive House

Ironwood is fully qualified to build your Passive House with a certified Passive House Consultant on staff as well as a certified Passive House Builder. We can build to this highest level of energy efficiency, or to whatever level of efficiency that suits your project parameters.

More than passive solar

"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, etc. Energy losses are minimized. Any remaining heat demand is provided by an extremely small source. Avoidance of heat gain through shading and window orientation also helps to limit any cooling load, which is similarly minimized. An energy recovery ventilator provides a constant, balanced fresh air supply. The result is an impressive system that not only saves up to 90% of space heating costs, but also provides a uniquely terrific indoor air quality." (Passive House Institute US)


  • A super insulated, air-tight envelope that minimizes thermal bridging
  • Highly efficient windows and doors
  • Mechanical ventilation with heat recovery
  • Added construction costs for enhanced efficiency are off-set by substantial savings
  • The purchase and installation of heating and cooling systems (which are tiny in comparison to typical systems)
  • A lifetime of reduced bills and reduced impact on the planet

Utilizing the key elements of the Passive House standard Ironwood is able to provide you with the most energy efficient building options available. These construction details not only create a more comfortable living environment, increase indoor air quality and reduce your impact on the planet; they also save you significant money on your utility bills. We have a certified passive house consultant, and a certified passive house builder on staff and would be happy to meet with you to discuss what elements would be most cost-effective for your situation.

Passive House article in Dwell Magazine:
While the Passive House standard hails from Europe it is gaining momentum in the U.S. as seen by this article Dwell magazine. Click here for article.

Other Passive House resources:
The Passive House Institute U.S.
Dwell Article: Passive Houses in Stokholm