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- What is Passive Building?
  Your passive building questions, answered
  
  Passive Building
  
  Passive Building Principles
  
  Passive Building FAQs
  
  A Better Way to Zero
  
  Passive Building Foundations Training
- Sectors
  Passive isn't just for houses
  
  Single-Family
  
  Multifamily
  
  Office Buildings
  
  Schools
  
  Other Non-Residential
- Projects
  Phius Certified Projects are the most energy efficient and comfortable buildings in the world
  Find a Project
  
  Project Certification
  
  Submit a Project
  
  Certification Review Queue
- Products
  Phius Certified Products are guaranteed to perform to passive standards
  View Products
  
  Product Certification Overview
  
  Window Certification
  
  Panel Certification
- Professionals
  Phius Certified Professionals are on the cutting edge of high-performance building
  Find a Professional
  
  Phius Certified Consultant (CPHC®)
  
  Phius Certified Builder (CPHB)
  
  Phius Certified Rater
  
  Phius Certified Verifier
  
  Phius Certified Trades Professional
  
  Phius Associate
  
  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
July 30 – August 1

Phius Certified Builder Training and Certification Exam | Seattle, WA | July 2025
Be part of the launch class for the new CPHB training!
Upcoming Sessions
- July Member Office Hours - Project Questions
  July 15
- Phius Certified Builder Training and Certification Exam | July 2025
  July 21 – August 1
- WUFI Passive Advanced - Multifamily | July 2025
  July 24 – 25
- Intro to THERM | July 2025
  July 29 – August 6
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
  
  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

Phius Board of Directors

The Phius mission is shaped and guided by its esteemed and highly decorated Board of Directors.

Board Members

Kimberly Llewellyn

Board President

Gabriela Martin

Board Secretary; Program Director at the Illinois Clean Energy Community Foundation

Dan Whitmore

Board Vice President; Passive House Consultant at RDH Building Science

Karan Gupta

Board Treasurer

Prudence Ferreira

VP Sustainability + Resilience: Passive House Lead at Thornton Tomasetti

Katrin Klingenberg

Co-Founder & Co-Executive Director

Lisa White

Co-Executive Director

A.J. Patton

548 Enterprise Chairman & CEO

Alan Gibson

Owner and General Manager of GO Logic LLC

Michelle Tinner

Director of Passive House Services at Sustainable Comfort, Inc.

Jen Grosso

Director of Architecture, Alloy Development

Jonathan Bean

Assistant Professor of Architecture, Sustainable Built Environments, and Marketing and Chair of the Sustainable Market Transformation program, University of Arizona

Terence Hill

Emeritus Board Member

Walter Grondzik

Emeritus Board Member; Professor of Architecture at Ball State University

Richard S. Levine

Emeritus Board Member; Center for Sustainable Cities Co-Director

Mary Rogero

Emeritus Board Member; Chair of the Department of Architecture & Associate Professor at Miami University