Phius Mission/Vision

The Phius mission is to support comfortable living for all and the well-being of the planet.

Phius was founded to create a carbon-neutral, healthy, safe, and just future for everyone by mitigating the climate crisis.

Katrin Klingenberg , Phius Co-Founder and Executive Director

Phius Milestones: Driving Next-Generation Passive Building Standards

In 2007, architect Katrin Klingenberg and builder Mike Kernagis cofounded Phius (Passive House Institute US) to train consultants and certify projects on our climate-tailored passive building standard. Today, Phius is the leading passive building standard in North America, and the Phius Standard is applicable globally. We certify the most passive house projects in North America and put passive at the forefront of the zero-energy movement.

View Phius Milestones

Phius Alliance: Building Community, Sharing Knowledge

Established in 2010, the Phius Alliance (formerly PHAUS) brings together the growing community of passive building professionals in the US to share experiences and technical knowledge, spread the word about passive building and serve as a voice for shaping national policy. See what we're accomplishing together.

Phius Alliance

The Phius Difference

Phius Co-Founder and Executive Director Katrin Klingenberg discusses what sets Phius apart from other passive building standards

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The Phius Community: On a Zero-Carbon Mission

11.2m

square feet of Phius design and fully certified projects

350+

design and certified multifamily projects

states and provinces home to a Phius certified project

Learn More About Project Certification

Request a Phius 101 Presentation

The best way to introduce Phius to your firm is with a one-hour Phius 101 presentation. Just fill out the request form and we'll come to you!

You Can't Afford Not To Get Phius Certified

Phius has trained more than 3,000 professionals and is leading the way for the zero-carbon movement. Learn how building to Phius' high-performance standards can elevate your practice.

Architects

Design to the Phius standard, the leading passive building certification in North America and the fastest path to zero energy.

Phius Certified Consultant (CPHC®)

Builders

Construct high-performance buildings that are affordable, attainable and accountable — without needing to use any special materials.

Phius Certified Builder (CPHB)

Raters

Geared toward experienced RESNET and BPI professionals, Phius Certified Raters are qualified to rate single-family residential projects.

Phius Certified Rater

Verifiers

Phius Certified Verifiers are qualified to rate large-scale multifamily and commercial buildings. Verifiers learn protocols specific to low- and mid-rise projects.

Phius Certified Verifier