Arango's 1,000-square-foot home in Amherst, Massachusetts is run entirely by solar power. He uses the home as an example in the class he teaches on renewable energy.
Arango describes the perks of living in a house that runs on passive principles, including lower energy bills and less noise from heaters.
To adhere to Passivhaus standards, the house has a tightly-sealed shell, a smart ventilation system, and plenty of windows to let in natural light.
Arango worked with Maine-based firm GO Logic on the design and construction of the house.