Free Courses / HVAC University A-Z
HVAC University A-Z
This course does NOT make you licensed, EPA-certified, insured, or qualified to do paid HVAC work alone. In North Carolina, contracting HVAC work requires a state license and handling refrigerant requires EPA Section 608 certification. Practice only the safe activities listed — never open, wire, charge, or repair real equipment without qualified supervision.
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This is a free, 12-unit, ~120-hour course that takes you from zero HVAC knowledge to apprenticeship-ready. Every training video is embedded right here — you never have to leave this page. Your progress saves automatically in this browser.
How to complete this course
- Work sequentially: Do the units in order — each unit builds on the last. Plan to spend about 10 hours per week (averaging one unit per week).
- Watch actively:If units contain videos, pause at every new term, write down a one-line definition in your own words, then resume. Tick “Mark watched” when done.
- Practice and test:Read “The big picture” and “Critical points,” complete safe practice tasks, then take the quiz — answering out loud before revealing.
- Organize your notes: Download the unit notes (a markdown summary file) and keep them in a digital or physical binder.
- Validate achievement:When you meet the “Done when” standard, hit Mark unit complete in the unit checklist. Safety quizzes require 100% — no exceptions.
The 8 Hard Stops (memorize before Unit 3)
- Never touch a capacitor — it stores a lethal charge even with power off.
- Never open an equipment panel without supervision.
- Never measure live circuits — multimeter practice is batteries only.
- Never touch refrigerant connections without EPA 608 + supervision.
- Never work on gas appliances. Gas smell = leave, call 911/utility from outside.
- Never climb a damaged ladder; inspect before every use; never the top two rungs.
- Stop at dizziness or cramps in heat — water, rest, shade (OSHA).
- Carbon monoxide is odorless. CO alarm = everyone out, now.
About the videos and sources
All 48 videos were verified (title, channel, publish date, duration) and published within 5 years of the course's research date (2026-06-12). Three topics — ladder safety, power-tool safety, and data plates — have no qualifying current video; those units link the official OSHA pages and written guides instead, and say so plainly. Safety and certification facts are confirmed against EPA, OSHA, NIOSH, BLS, and North Carolina sources. If a video and an official source ever disagree, the official source wins.