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- What is Passive Building?
  Your passive building questions, answered
  
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Our Approach
- New Construction
  Phius CORE and Phius ZERO provide the path for constructing a Phius building from the ground up.
- Retrofit
  Upgrade existing buildings to Phius standards using Phius CORE REVIVE and Phius ZERO REVIVE.
- Commercial
  Phius standards aren't just for residential buildings. Phius CORE COMM and Phius ZERO COMM can be applied to any non-residential building.
Categories
May 29

Phius Foundations Live! Passive Building in the Southwest
New introductory Phius event coming to Tucson May 29!
Upcoming Sessions
- May Webinar: Non-Res QA Workbook
  May 19
- Phius Foundations Live! Passive Building in the Southwest
  May 29
- WUFI Passive Advanced - Multifamily | June 2026
  June 3 – 4
- Phius Certified Consultant Training & Certification Exam | June 2026
  June 8 – 18
- Policy Work
  Promoting policies designed to grow passive building
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Passive Building
- What is Passive Building?
  Your passive building questions, answered
- Sectors
  Passive isn't just for houses
Certifications
- Projects
  Phius Certified Projects are the most energy efficient and comfortable buildings in the world
  Find a Project
- Products
  Phius Certified Products are guaranteed to perform to passive standards
  View Products
- Professionals
  Phius Certified Professionals are on the cutting edge of high-performance building
  Find a Professional
Standards
Our Approach
- New Construction
  Phius CORE and Phius ZERO provide the path for constructing a Phius building from the ground up.
- Retrofit
  Upgrade existing buildings to Phius standards using Phius CORE REVIVE and Phius ZERO REVIVE.
- Commercial
  Phius standards aren't just for residential buildings. Phius CORE COMM and Phius ZERO COMM can be applied to any non-residential building.
Education
Categories
Upcoming Sessions
- May Webinar: Non-Res QA Workbook
  May 19
- Phius Foundations Live! Passive Building in the Southwest
  May 29
- WUFI Passive Advanced - Multifamily | June 2026
  June 3 – 4
- Phius Certified Consultant Training & Certification Exam | June 2026
  June 8 – 18
May 29

Phius Foundations Live! Passive Building in the Southwest
New introductory Phius event coming to Tucson May 29!
Resources
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
- Tools and Support
  Providing the tools you need to create healthier buildings
  Resource Library
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