Phius Milestones

Phius Through the Years


    • Katrin Klingenberg breaks ground on the first passive house to be built in the United States, the Smith House, in Urbana, Illinois.
    • Smith House is the first residential passive house project completed in the United States.
    • Klingenberg and builder Mike Kernagis found the non-profit e-cological Construction Laboratory (e-colab) as a non-profit affordable housing developer in Urbana, Illinois to further investigate the feasibility of applying passive building principles in the United States.
    • E-colab, in partnership with the City of Urbana, builds Fairview I, the first affordable single-family passive house unit in the United States.

The Phius Community: On a Zero-Carbon Mission


square feet of Phius design and fully certified projects


design and certified multifamily projects


states and provinces home to a Phius certified project

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