Phius Certified Passive House Consultant (CPHC)

CPHC stands for Phius Certified Consultant, listed by Phius under its Professionals certifications alongside the Certified Builder, Rater, Verifier and Trades Professional. Phius describes its Certified Professionals as being on the cutting edge of high-performance building. The credential signals competence in passive building design and consulting; it is not a license to practice engineering or architecture.

No. These questions are original material written by an independent study platform and are not affiliated with, endorsed by, or drawn from Phius materials. Use them to find weak areas, then verify every technical claim against Phius standards documents, the WUFI Passive tool documentation, and the resources Phius publishes.

We do not state a question count or time limit because Phius has not published those figures in the material available to us. Do not rely on numbers from older prep courses, since exams are revised. Check the Phius training and events listings, or contact Phius directly, for the current format before you schedule.

Passing score, exam fee, and retake policy are not published in the source material we could retrieve, so we leave them blank rather than guess. Confirm these with Phius when you register for a training session. Budget for the full training course as well as the exam, since Phius lists them together as a combined session.

Start with the Phius Passive Building Principles page so the five principles and the passive building vocabulary are solid. Then move to enclosure design, since it drives most load calculations. After that, learn WUFI Passive modelling, then ventilation and mechanical systems, and finish with the standards and quality assurance material that governs certification.

It matters a lot. Phius publishes a dedicated WUFI Passive design tool page and separate WUFI Passive training, and modelling underpins every certification submission. Practise building a simple model end to end: geometry, envelope assemblies, thermal bridges, ventilation, and the resulting demand figures. Knowing the interface is not the same as interpreting results.

Typical weak spots are thermal bridge accounting, understanding the difference between the Phius CORE, ZERO, REVIVE and COMM standards, and ventilation design that ignores balanced supply and exhaust. Candidates also lose marks by memorizing thresholds without understanding why they exist. Practise explaining each design decision and its energy consequence in your own words.

Validity period and renewal requirements are not stated in the source material we retrieved, so we do not give a number. Phius maintains a dedicated Maintain Credentials page under Professionals, which is the authoritative place to check continuing education requirements and renewal deadlines. Look there before your credential lapses rather than after.

Phius publishes scheduled sessions on its events pages. At the time of writing, a Phius Certified Consultant Training & Certification Exam was listed for November 9–20, 2026, alongside a Builder session on the same dates. Dates change, so confirm on the current Phius events listing rather than relying on a cached page.