Phius Certified Rater
Phius
The Phius Rater ensures homes meet energy efficiency standards.
Key Strengths
- Built on the widely recognized RESNET HERS Rater foundation
- Covers advanced building science including airtightness, moisture control, and thermal bridging
- Enables professionals to serve as required third-party QA on Phius-certified projects
- Aligns with co-requisite programs like ENERGY STAR, EPA Indoor airPLUS, and DOE Zero Energy Ready Home
- Positions raters to work on high-demand passive building projects
- Issued by Phius, the leading U.S. passive building standards organization
Ideal For
This certification is best suited for RESNET HERS Raters who want to expand their expertise into passive building and high-performance residential construction. It is ideal for energy raters, building inspectors, and commissioning professionals working with builders, developers, or architects pursuing Phius project certification. Those already active in the green building or energy efficiency space will find the most direct career benefit.
Target Audiences
Relevant Roles
Industries
Alignment & Recognition
Accrediting Body
Scope
Overview
Phius Certified Rater is a program designed to ensure homes and buildings meet energy efficiency standards. Phius (Passive House Institute US) certifies raters who evaluate these structures for compliance. The certification began as part of a movement towards energy-efficient building in the U.S., with an aim to reduce energy consumption and increase comfort. Statistics show buildings certified by Phius can achieve up to 90% energy savings compared to standard buildings.
Individuals seeking certification must undergo rigorous training and exams. This certification is ideal for professionals like energy consultants and home inspectors. For businesses, having Phius Certified Raters can enhance credibility and contribute to sustainability goals. Key partners include building constructors, architects, and developers who wish to construct or renovate structures to meet high energy efficiency standards. The program collaborates with various organizations to promote sustainable building practices nationwide.
Requirements & Assessment
Evidence Requirements
Candidates must hold a RESNET HERS Rater credential as a prerequisite. They must complete the Phius Certified Rater training program and pass the Phius Certified Rater exam. Practical competency in on-site inspections, airtightness testing, and commissioning of high-performance mechanical systems is expected.
Prerequisites
Assessment Process
The Phius Certified Rater exam assesses knowledge of passive building science, Phius certification requirements, co-requisite programs (ENERGY STAR, EPA Indoor airPLUS, DOE Zero Energy Ready Home), high-performance mechanical systems, and airtightness testing protocols. The exam is taken following completion of the instructor-led Phius Certified Rater training. Specific question count, passing score, and retake policies are outlined in the Phius Certified Rater Manual available on the Phius website.
Renewal & Maintenance
Phius Certified Raters are generally required to maintain their RESNET HERS Rater credential and complete continuing education to stay current with Phius program updates. Specific renewal cycles and CEU requirements are managed by Phius and may be updated with each program version. Raters should consult the current Phius Certified Rater Manual for the latest renewal requirements.
Continuing Education (CPE/CEU)
Phius Certified Raters must complete continuing education to maintain their credential, typically aligned with Phius program updates and RESNET CEU requirements. Specific CEU hour requirements and eligible activities are detailed in the Phius Certified Rater Manual and may change with program version updates.
Accountability Model
Impact & Outcomes
Employer Recognition
Consider Alternatives If...
Professionals without a RESNET HERS Rater credential or equivalent experience in residential energy testing and commissioning will find this certification inaccessible without first meeting the prerequisite. Those primarily focused on commercial or large multifamily buildings may find the residential scope limiting.
Alternative Programs
Frequently Asked Questions
Quick Facts
Certification
English
In-Person, Online, Instructor-led
Available
