High-Performance Building Systems—Chosen, Not Just Sold.

We help builders, designers, and homeowners select ventilation, envelope, and electrification systems that perform as intended—without guesswork or costly mistakes.

  • Passive House–informed system selection
  • Real-world support beyond product specs
  • Trusted by professionals and homeowners nationwide

Not sure which products are right for your home or project? Call us at 1- 855-367-7442 or schedule a 15-minute Pre-Purchase System Review with one of our knowledgeable team members.

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Exterior Weatherproofing

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Interior Air-Sealing

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Small Planet Supply

Plan It With The Planet In Mind

Small Planet Supply is dedicated to the supply, education, and training in the use of energy-efficient building materials and building practices. We are passionate champions of the concept that humans can build buildings to live in, while caring for and restoring the environment.

Learn more about our history and mission.