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- What is Passive Building?
  Your passive building questions, answered
  
  Passive Building
  
  Passive Building Principles
  
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  A Better Way to Zero
  
  Passive Building Foundations Training
- Sectors
  Passive isn't just for houses
  
  Single-Family
  
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- Projects
  Phius Certified Projects are the most energy efficient and comfortable buildings in the world
  Find a Project
  
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  Certification Review Queue
- Products
  Phius Certified Products are guaranteed to perform to passive standards
  View Products
  
  Product Certification Overview
  
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- Professionals
  Phius Certified Professionals are on the cutting edge of high-performance building
  Find a Professional
  
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  Maintain Credentials
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
- Phius Certified Builder Training and Certification Exam | May 2026
  May 11 – 22
- Phius Certified Consultant Training & Certification Exam | May 2026
  May 11 – 22
- May Office Hours - Project Questions
  May 12
- WUFI Passive Single Family | May 2026
  May 13 – 20
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
  
  Financial Incentives
  
  Codes
  
  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
  
  METr Design Tool
  
  WUFI Passive Design Tool
  
  Climate Data
  
  Quality Assurance
  
  Tech Corner

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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
- Phius Certified Builder Training and Certification Exam | May 2026
  May 11 – 22
- Phius Certified Consultant Training & Certification Exam | May 2026
  May 11 – 22
- May Office Hours - Project Questions
  May 12
- WUFI Passive Single Family | May 2026
  May 13 – 20
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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Phius Alliance

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Upcoming events

May 13 2026

Live Virtual Session Training

WUFI Passive Single Family | May 2026

Chris West Hans Breaux

W Th 11:00 A - 3:00 P / W 11:00 A - 1:00 P Eastern 10 CEU

Jun 3 2026

Live Virtual Session Training

WUFI Passive Advanced - Multifamily | June 2026

Ryan Abendroth Sayo Okada

W Th | 1:00 - 5:00 P Eastern 8 CEU

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