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- What is Passive Building?
  Your passive building questions, answered
  
  Passive Building
  
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  Passive isn't just for houses
  
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  Phius Certified Projects are the most energy efficient and comfortable buildings in the world
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- Products
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- Professionals
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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
- March Webinar: Feasibility Study Checklist
  March 10
- Phius Certified Builder Training & Certification Exam | March 2026 with AGCMA
  March 10 – 12
- Intro to THERM | March 2026
  March 10 – 19
- Phius Certified Builder Training and Certification Exam | March 2026
  March 16 – 27
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
  
  Financial Incentives
  
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  Qualified Allocation Plans
  
  Cost Data
- Tools and Support
  Providing the tools you need to create healthier buildings
  Resource Library
  
  Certification Support
  
  Calculators and Protocols
  
  Feasibility Study
  
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  WUFI Passive Design Tool
  
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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
- March Webinar: Feasibility Study Checklist
  March 10
- Phius Certified Builder Training & Certification Exam | March 2026 with AGCMA
  March 10 – 12
- Intro to THERM | March 2026
  March 10 – 19
- Phius Certified Builder Training and Certification Exam | March 2026
  March 16 – 27
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
About Us
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Upcoming events

Mar 17 2026

In-Person Session Training

Phius Certified Trades Professional - Enclosure Specialist Training | Albany, NY

Rob Leonard

8:00 - 5:00 PM Local 40 CEU

Apr 27 2026

In-Person Session Training

Phius Certified Trades Professional - Enclosure Specialist Training | Houston, TX | April 2026

Rob Leonard David M Horton

8:00 - 5:00 PM Local 40 CEU

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