Project Certification Overview

Phius is the leading passive building certification program in North America for any type of project, large or small. Make sure you're creating comfortable, healthy, resilient structures. Get on the path to Phius certification today!

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Why Phius Certification Sets Your Project Apart

Phius is the only passive building certification that combines a thorough passive house design verification protocol with a stringent Quality Assurance/Quality Control (QA/QC) program performed onsite by Phius Raters and Verifiers. Learn why you should get your project Phius certified.

Build Smarter With Phius


units pre- or fully Phius certified


square feet of Phius pre- and fully certified projects


states and provinces home to a Phius certified project

Phius has the largest and fastest-growing passive building certification program in North America.

Why Certify?

  • The Phius Standard targets the sweet spot where aggressive energy and carbon reduction overlap with cost effectiveness, taking into account a full range of variables including climate zone, building size, building density, source energy and costs. The Phius Technical Committee and Building Science Corporation developed the standard over three years under a U.S. DOE Building America Grant.

Certification Built on Existing Programs

Standards from Other Programs Utilized by the Phius Project Certification Program

Includes U.S. Department of Energy (DOE) Zero Energy Ready Home requirements

Includes U.S. Environmental Protection Agency (EPA) Indoor airPLUS label

Includes U.S. Environmental Protection Agency (EPA) ENERGY STAR requirements

Includes Home Energy Rating System (HERS) as part of the third-party Residential Energy Services Network (RESNET) program

The Staircase to Success

Sam Rashkin (Chief Architect of the Building Technologies Office in the Office of Energy Efficiency and Renewable Energy) on the relationship between ZERH & passive building “...the housing industry has a clear path for progressively more efficient homes that also ensures high-performance. Now let’s all work together moving builders along this path.”

More on the Staircase to Success

Submit your project for Phius Certification Today!

Become part of the solution by submitting your project for Phius certification.