Exam prep built by techs, mapped question-for-question to the official 313A blueprint. Start with a free lesson, find your weak spots in 10 minutes, and get a study plan built for you.
More than half of the 313A exam is application — real job-site scenarios, not textbook recall. Studying random practice questions doesn't work because they aren't weighted like the real thing. We fixed both.
Every lesson ties to one of the six official Major Work Activities — and we spend the most time where the exam does.
Each topic ends in a worked "you're on site, here are the readings, what next?" walkthrough — the way the exam asks.
A diagnostic scores you across all six activities and points your study at your weak spots.
Foundations first (the refrigeration cycle, refrigerants, electrical, piping), then the six job-activity modules — install and service get the most, because they're 43% of the exam.
A 750-question bank and full 125-question timed mock exams weighted exactly like the real 313A. Pass the completion exam, earn your certificate.
Optional: send your certificate and resume straight to HVAC employers in our index who are hiring apprentices. Coming soon
Official Major Work Activity weightings. Notice install + service = almost half the exam.
Exam breakdown, the refrigeration-cycle lesson, and your diagnostic + study plan.
Start freeAll foundations + six job-activity modules + the 750-question bank + timed mocks.
Get the courseSit the completion exam, earn your branded certificate of completion.
Auto-send your certificate + resume to hiring HVAC employers. Soon
*Prototype — prices to be set after competitor pricing research.
Take the free diagnostic and get a study plan pointed straight at your weak spots.
Take the free diagnostic →