Tennessee HVAC license requirements at a glance
- Issued by
- Tennessee Board for Licensing Contractors (BLC)
- License required
- Yes for projects of $25,000 or more; below that, many municipalities require the Limited Licensed Electrician (LLE) for HVAC wiring
- Experience
- 3 years practical experience
- Exam
- Business and Law exam plus trade exam (administered by Prov as of July 1, 2026)
- State fees
- $roughly $350+ for the contractor license; the LLE runs about $50
- Renewal
- Every 2 years
- Avg. TN HVAC salary
- $54,620/yr (2025)
- Federal
- EPA Section 608 required
How do you get an HVAC license in Tennessee?
- Start paid HVAC work, Tennessee has no state technician license, and build toward 3 years of verifiable experience (an engineering degree in the mechanical field can substitute)
- Obtain EPA Section 608 certification for refrigerant handling (federal requirement)
- For work under $25,000: get the LLE (Limited Licensed Electrician) where your county requires it, a 40-question open-book exam, 73% to pass, about $50
- For the full contractor license: pass the Business and Law exam and your trade exam (CMC full mechanical or CMC-C HVAC/refrigeration), administered by Prov as of July 1, 2026
- Submit a reviewed financial statement (audited if seeking a monetary limit above $3 million), proof of insurance, and the BLC application; your financial showing sets your project ceiling
What license tiers does Tennessee offer?
Three layers by project size: local licensing (varies by city and county) for small work, the state LLE for electrical components on projects under $25,000 where required, and the state Mechanical Contractor license for $25,000 and up, in two flavors: CMC (full mechanical, requires board pre-approval to test) and CMC-C (HVAC, refrigeration, and gas piping, no pre-approval needed, and required for solar thermal and geothermal installers). Your financial statement sets your monetary limit within the license.
What is the Tennessee HVAC exam like?
Two exams for the contractor license: Business and Law, and the trade exam for your classification, with content differing between CMC and CMC-C. As of July 1, 2026, Prov administers all Board for Licensing Contractors exams. The LLE exam is separate and simpler: 40 questions, open book, 73% to pass, offered at testing centers statewide. Tennessee accepts the NASCLA national commercial exam in lieu of some trade exams.
How much does an HVAC license cost in Tennessee?
The full contractor license runs roughly $350-$400 in state costs plus exam fees, and the real gating cost is the financial statement: a CPA-reviewed statement for monetary limits up to $3 million, audited above that, plus general liability insurance scaled to your limit ($100,000 coverage up to $500,000 limits, rising to $1 million for the largest). The LLE is the budget entry: about $50 plus the exam. Renewal is every two years, $200 for contractors, $50 for the LLE.
How long does it take to become an HVAC tech in Tennessee?
The clock is the 3 years of practical experience, paid full-time work under a licensed contractor. Tennessee splits HVAC licensing by project size: jobs of $25,000 or more require a state Mechanical Contractor license (three years of experience plus two exams), while smaller work runs on local licenses and, in many counties, the state LLE credential.
Is HVAC a good career in Tennessee?
Tennessee average from state wage data (2025 estimate). National median from the U.S. Bureau of Labor Statistics (2023). Verify current figures with BLS.
What does it take to start your own HVAC business in Tennessee?
The BLC application is finance-forward: a reviewed financial statement (audited above $3 million monetary limit) determines your project ceiling, plus general liability insurance scaled to that limit and workers comp from your first construction employee, Tennessee's construction industry has a one-employee threshold. Renewal every two years at $200 with updated financials and insurance. Net worth requirements apply by classification.
What most guides get wrong about Tennessee
Tennessee's two traps: first, the $25,000 threshold applies to total contract value including materials, and the state explicitly prohibits splitting projects into phases to stay under it, an enforcement point that catches growing shops. Second, the CMC-C classification covers HVAC and refrigeration but not the electrical work inside it, which is why many municipalities require CMC-C holders to also carry the LLE. And as of July 1, 2026, exams run through Prov, so pre-2026 prep guides point at the wrong testing company.
Tennessee HVAC license: frequently asked questions
Do you need a license for HVAC work in Tennessee?
It depends on project size. Projects of $25,000 or more (total contract, materials and labor combined) require a state Mechanical Contractor license from the BLC. Below $25,000, licensing is local, and many municipalities require the state LLE credential for the electrical side of HVAC work. Projects cannot be split into phases to duck under the threshold; the state applies it to total contract value.
What is the Tennessee LLE and do HVAC techs need it?
The Limited Licensed Electrician credential covers electrical work on projects under $25,000, and many counties require it for HVAC installers handling wiring, especially those holding the CMC-C rather than full CMC. It is the cheapest credential in the system: about $50, a 40-question open-book exam, 73% to pass, renewable every two years.
What changed with Tennessee contractor exams in 2026?
The exam administrator changed: beginning July 1, 2026, Prov administers the exams for the Board for Licensing Contractors, taking over from the previous vendor. If your study materials or scheduling instructions reference the old testing company, they are out of date; schedule through Prov.
Does Tennessee accept out-of-state HVAC licenses?
Partially. Tennessee has trade-exam waiver agreements with several states (including South Carolina for commercial classifications and West Virginia for mechanical) and accepts the NASCLA national commercial exam. The waivers apply only to full contractor licenses, not to the LLE or limited plumbing programs, and there is no reciprocity for the LLE at all.
HVAC licensing in every state
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