Phius Standards

Phius' climate-specific standards are leading the way for passive building in North America, while also guiding successful projects worldwide.

The standard in passive

The Phius passive building (passive house) standard provides a quality-and-conservation-first framework for net zero building. They're internationally applicable and grounded in building science, best practices, the quality assurance necessary to deliver optimal results.


2021 Updates

The 2021 update marks the next step towards making net zero universal and has charged forward in two key areas:

1) New provisions that incentivize building electrification and
2) A prescriptive path for single family / townhomes intending to help facilitate greater adoption.

And as always, they target the sweet spot where aggressive energy and carbon reduction overlap with cost effectiveness, taking into account a full range of variables including climate, source energy, building size and cost.

Phius CORE

Phius CORE is Phius' legacy certification. It is focused on optimizing investment in passive and active conservation strategies to achieve superior performance and quality construction. CORE targets performance that is challenging but achievable with conservation measures only and has both a performance path for all buildings and a limited-scope prescriptive path for single-family/townhomes.

More about Phius CORE

CORE Prescriptive Path for Single-Family Homes

CORE for Existing Buildings

CORE for Non-Residential Buildings

Phius ZERO

Phius ZERO is Phius' zero energy standard. The standard is built upon Phius CORE, utilizing the same focus on passive conservation measures first but sets the net source energy target at ZERO, does not allow for fossil-fueled combustion on site, and provides both on-site and off-site renewable energy options to get to ZERO. See why Phius is the fastest path to ZERO.

More about Phius ZERO

ZERO for Existing Buildings

ZERO for Non-Residential Buildings

Why Build to Phius Standards



Phius-certified buildings go through a rigorous quality control process, ensuring safety for the environment and the building inhabitants.



Superb indoor air quality is a prerequisite for Phius certification – you can count on a healthy environment.



Superinsulation, high performance windows and efficient mechanical systems create a comfortable, quiet building.



Phius buildings have been proven to be more resilient in the event of natural disasters, such as wildfires and extreme heat and cold events.

Long-Term Durability

Long-Term Durability

The holistic design of Phius buildings and attention to detail in the enclosure make them uniquely built for the long haul.



Phius projects require minimal to no additional upfront costs, while guaranteeing substantial energy cost savings in the future.

Get Phius Certified Today. Build a Better Tomorrow.

Phius has the largest and fastest-growing passive building certification program in North America. Our program combines thorough design verification protocol with a stringent Quality Assurance/Quality Control (QA/QC) program to deliver better buildings.
Certify Your Passive Project