The Florida HVAC License, Explained: Class A, Class B & the Exams

The class question is really a business question: what jobs do you want to be allowed to sign for? Certified licenses (state-issued, work anywhere in Florida) break down like this:

• Class B Air Conditioning — install, maintain, repair, and replace HVAC systems within capacity limits: generally 25 tons of cooling and 500,000 BTU of heating. Plenty for residential and most light commercial. Trade exam: 80 questions, 5 hours.
• Class A Air Conditioning — the same scope with no capacity limit, including ductwork. Required the day you want commercial chillers, large rooftop units, or big multifamily work. Trade exam: 130 questions, 7.5 hours.
• Certified Mechanical Contractor — unlimited HVAC plus related mechanical systems such as process and pressure piping. The broadest Division II scope; its trade exam shares its core with air conditioning and adds mechanical-systems territory.
• All three also require the Business & Finance exam — 120 questions, 6.5 hours — which is identical for every Florida trade.

Florida historically had two license flavors: certified (pass the state exams, work statewide) and registered (qualify locally, work only in that jurisdiction). The 2023–2024 licensing reforms eliminated most local licensing paths and pushed the trades toward state licensure, which is one reason exam volume has grown.

For anyone starting now, certified is the practical answer: one license, the whole state, no dependence on county-by-county rules that are actively being phased out. That's the path this guide — and the exams it covers — describes. If you hold an old local registration, check current DBPR guidance on transition timelines rather than relying on secondhand summaries.

Passing the exams is the visible hurdle, but the application has its own checklist. The exact rules live with the DBPR and change periodically, so treat this as the map, not the measurements — verify current requirements at myfloridalicense.com before you apply.

• Experience/education: Florida requires a combination of experience and/or education — commonly four years of trade experience, with college credit able to substitute for part of it. Documentation matters; line up your dates and employers early.
• Financial responsibility: expect a credit report requirement and, below a credit-score threshold, a bond or financial course option. Plan for this before the application, not during.
• Insurance: proof of general liability and workers' compensation (or a valid exemption) is required at licensure.
• Fingerprinting and background check through an approved vendor.
• Fees: DBPR application and licensing fees vary by application window — our cost guide has an itemized calculator, including the exam fees of $215 per part per attempt.

The air conditioning trade exam is where field experience finally pays — and where it quietly runs out. The published content outline for Class A concentrates the points in installation of refrigeration and HVAC systems (the largest area at roughly a quarter of the exam), with substantial blocks in pre-installation planning, equipment and components, maintenance analysis and service, sheet metal ducts, and safety — plus smaller slices for energy management and indoor air quality.

Working techs recognize most of that list. What the exam adds is the part daily work doesn't rehearse: doing it from the books. Load calculation questions expect Manual J discipline rather than rule-of-thumb sizing; code questions expect you to find the Florida Mechanical Code section, not remember the jobsite version; refrigeration questions go deeper into cycle theory and troubleshooting logic than a service call usually demands. At 130 questions over 7.5 hours (Class A), it's also simply a long day — pacing is a tested skill in itself.

Ask around: the part that sends air conditioning candidates back to Pearson VUE is usually not the trade exam. It's Business & Finance — 120 questions and 6.5 hours of lien law deadlines, financial statements and ratios, payroll taxes, employment law, and Chapter 489 licensing rules. It's identical for every trade, it's required for every trade, and it sits maximally far from what an HVAC tech does all day.

Treat it as its own preparation project, not an afterthought after the trade exam. The heaviest domains — financial management and accounting at roughly 20% of the exam and Florida lien law at roughly 16% — are respectively a math-fluency problem and a book-navigation problem, and both respond to drilling rather than reading. Our dedicated Business & Finance guide breaks the whole exam down domain by domain.

Most HVAC candidates study around full work weeks, so the plan has to be efficient rather than heroic. The structure that works: study by the published blueprint weights, make every session retrieval practice instead of re-reading, and prove readiness under real conditions before booking anything.

That last step is the money step. At $215 per part per attempt, sitting the exam on a feeling is the most expensive habit in this process. Take full-length, clock-enforced practice exams with your tabbed references — both parts — and book the real thing only when you're passing simulations with margin. That's the principle LicenseReady is built around: original questions weighted to the actual blueprints for both the air conditioning and Business & Finance exams, spaced repetition on your weak domains, reference navigation training, and a readiness score that stays honest until you've passed timed full-length sims. It's also the standard behind our Pass Guarantee — reach Exam Ready, sit the exam, and if you don't pass, the course is free.

• Weeks 1–2: baseline and orientation — take a readiness check, read the domain guides for your weak areas, tab your references as you go.
• Weeks 3–6: daily retrieval practice weighted by blueprint domain, calculations drilled until the setup is automatic, lookups drilled until they're reflexive.
• Final 2 weeks: full-length timed simulations of both exams with your tabbed books; review every miss; book the exams only when you're passing with a few points to spare.