Commercial HVAC Practice Test

The Commercial HVAC Practice Test is a free intermediate-level, 20-minute skill test from Science of Apps. Practice for commercial HVAC — system types such as rooftop units, chillers and VAV, the refrigeration cycle and components, airflow, ventilation and loads, controls and building automation, and maintenance, troubleshooting, safety and refrigerant handling — written to ASHRAE standards, EPA Section 608 refrigerant rules and DOE HVAC guidance for 2026. US-focused. Score 70% or more on its 20 questions to earn a verifiable Commercial HVAC Readiness certificate (SOA-CHVA). Every question is based on published standards and research — including ASHRAE standards and guidelines (ASHRAE), Section 608 refrigerant management (US EPA), ANSI/ASHRAE Standard 62.2 Ventilation and acceptable indoor air quality in residential buildings (ASHRAE) — and each answer is explained with its source.

Yes. Science of Apps has a free Commercial HVAC Practice Test built on the current exam outline for 2026 and 2027. It covers system types, refrigeration cycle, airflow, ventilation and loads and controls, maintenance and safety, scores you instantly and issues a verifiable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Commercial HVAC Readiness certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: ASHRAE standards and guidelines (ASHRAE); Section 608 refrigerant management (US EPA); ANSI/ASHRAE Standard 62.2 Ventilation and acceptable indoor air quality in residential buildings (ASHRAE); Sizing heating and cooling systems (US Department of Energy). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: System Types (RTUs, Chillers and Distribution); Refrigeration Cycle (Components, Pressures and Charge); Airflow, Ventilation and Loads (Airflow, Ventilation and Loads); Controls, Maintenance and Safety (BAS, Maintenance and Refrigerant rules). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Commercial HVAC technician, Service or installation technician, Building engineer or facilities technician, HVAC apprentice and Controls technician. It suits anyone who wants a quick, verifiable way to show Commercial HVAC knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

Commercial systems are larger and more varied: rooftop units, chillers, cooling towers, boilers, VAV systems and built-up air handlers, often tied to building automation. They handle bigger loads, ventilation codes and zoning that residential split systems do not.

A variable air volume (VAV) system delivers conditioned air at a roughly constant temperature and varies the air volume to each zone through VAV boxes, matching supply to each zone's load for comfort and energy efficiency.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.