Passive building is growing, and the fastest-growing market segment is multifamily housing (affordable and market rate) and commercial buildings. This training prepares professionals to understand the application of passive building and verification principles for multifamily and commercial projects pursuing Phius Certification. Typical students have experience with on-site building testing, commissioning and other 3rd party certification programs such as ENERGY STAR Multifamily New Construction, LEED Midrise, etc.

Course Topics

  • Background on building science, building enclosure systems and high performance mechanical systems
  • All requirements for the Phius Multifamily and Commercial certification programs, including requirements for 3rd party co-requisite programs
  • Large building air-tightness testing strategies and protocol for testing for Phius Certification compliance
  • Typical designs for passive building mechanical heating, cooling and ventilation systems and corresponding testing requirements
  • Passive building hot water delivery requirements and testing strategies


The training is open to all who would like to participate, but there are pre-requisites to qualify to take the Phius Certified Verifier Exam and earn the credential. The Phius Certified Verifier exam is offered in two versions: Baseline and Baseline + Multifamily Designation.

In order to work on Phius 2024 projects, verifiers are required to complete all ZERH training modules applicable to the ZERH MF V2 program specifications.

Continuing Education Units

RESNET Professional Development Hours


Phius CEUs

Earn 14 Phius CEUs

Incentives & Reimbursements