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The Twin Peaks Passivhaus + ADU, which appeared as part of this year’s Northwest Green Home Tour, started with countless hours of research on the owners’ end. Their main goal: to minimize their ecological impact in the face of climate change. From there, they assembled the dream team—[bundle] design studio and Bellingham Bay Builders—to finalize their plans and build a home that meets the rigorous standards of a Passive House.

This sustainable home uses cutting-edge technologies and strategies, such as solar energy with battery storage and a complete high density foam insulation wrap for the foundation. It features a heat recovery ventilator, air-tight building envelope, and durable surfaces that ensure amazing air quality for years to come. For the owners of Twin Peaks Passivhaus + ADU, the house’s net- positive energy performance is perhaps the most exciting feature. The energy profile of the home with its ADU will have a small offsetting effect on greenhouse gases in our atmosphere.


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"The energy profile of the home with its ADU will have a small offsetting effect on greenhouse gases in our atmosphere."