Key takeaways
- An HVAC business runs on two credential layers: EPA Section 608 certification, held by each technician who handles refrigerant, and a state contractor license, held by the company through a qualifying individual.
- State HVAC licensing varies sharply, from California's C-20 and Texas's ACR contractor license to Minnesota, which has no state license but requires a $25,000 mechanical contractor bond.
- The state license application records your company's business address, so the address you put on your LLC matters before you ever file for the license.
Before you start
- Separate the two layers early: EPA 608 is a personal certification for technicians, while the contractor license belongs to the business.
- Check your state's licensing body first, because the agency, license name, and experience requirements differ from one state to the next.
- Decide who your qualifying individual will be, since their experience and exam usually carry the company's license.
Who this is for
- HVAC technicians with field experience forming an LLC to contract on their own.
- Founders comparing state requirements before deciding where to license a heating and cooling business.
- Owners who want a professional business address on filings instead of a home address.
An HVAC business is licensed on two separate levels, and confusing them is the most common early mistake. One is a federal certification that belongs to the people doing the work; the other is a state contractor license that belongs to the company. You need both.
This guide walks through the two layers, how five states handle the contractor license, who actually holds it, and the address question that most HVAC startup guides skip.
Two Credential Layers: EPA 608 and Your State License
Before you sign your first job, separate the federal layer from the state layer. The federal layer is EPA Section 608 certification for handling refrigerant. The state layer is the contractor license that lets your company legally perform HVAC work. They do not substitute for each other.
- EPA Section 608: a federal certification under the Clean Air Act, earned by an individual technician, required to service equipment that could release refrigerant.
- State contractor license: issued by your state, held by the business through a qualifying individual, and required before the company can contract for HVAC work.
- Holding one does not satisfy the other. A 608-certified technician still needs the company to be licensed, and a licensed company still needs 608-certified people doing the refrigerant work.
EPA Section 608: The Federal Refrigerant Certification
Under Section 608 of the Clean Air Act, any technician who services equipment that could release refrigerant must be EPA 608 certified. It comes in four types, and it is earned by passing an EPA-approved exam.
- Type I covers small appliances, Type II high-pressure equipment, Type III low-pressure equipment, and Universal covers all three.
- The certification is held by the individual technician, not by your LLC. Your business does not hold a 608 certification; the people doing the work do.
- Once earned, the credential does not expire, so it stays with the technician across jobs and employers.
The LLC is not 608 certified
It is a common slip to say a company is EPA 608 certified. It cannot be. The certification is personal to each technician. When you bid work that involves refrigerant, what matters is that the people performing it hold the right type of 608 card.
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State HVAC Contractor Licenses Vary Widely
There is no national HVAC contractor license. Each state runs its own program, and the body in charge is different almost everywhere: a contractors' board in California, the licensing department in Texas, a construction board in Florida and Georgia, and the labor department in Minnesota.
| State | Licensing body | License | Key requirement |
|---|---|---|---|
| California | Contractors State License Board (CSLB) | C-20 (Warm-Air Heating, Ventilating and Air-Conditioning) | Required at $500 or more in combined labor and materials; qualifying individual needs four years of journey-level experience plus the exam |
| Texas | Department of Licensing and Regulation (TDLR) | Air Conditioning and Refrigeration (ACR) Contractor, Class A or B | Commercial general liability insurance: Class A at least $600,000 aggregate, Class B at least $200,000 |
| Florida | DBPR, Construction Industry Licensing Board | Certified (statewide) or Registered (local only); AC Class A or B | Certified applicants pass the state exam and meet financial-responsibility requirements |
| Georgia | State Board of Conditioned Air Contractors | Conditioned Air, Class I (restricted) or Class II (unrestricted) | Approved heat-load and duct-design course plus an exam (minimum score 70); initial exam fee about $110 |
| Minnesota | Department of Labor and Industry (DLI) | No state license; a $25,000 mechanical contractor bond instead | File the bond with DLI before contracting; some cities still require their own local license |
Five states, five very different setups, from a contractors' board to a bond-only state with no contractor license at all.
Two of these trip people up. Florida's Certified versus Registered split is a different question from Class A versus B: Certified lets you work statewide, while a Registered license only covers the county or city whose local license you hold, and that distinction is separate from the capacity classes. And Minnesota is the outlier that looks license-free but is not, because the $25,000 mechanical contractor bond is mandatory before you contract for heating, cooling, ventilation, or refrigeration work.
Verify the current figures
The fees, insurance minimums, and bond amounts above come from each state's licensing body as of mid-2026, and states adjust them. Treat the table as a map, then confirm the live numbers on your state's site before submitting anything.
The Qualifying Individual vs Your LLC
A contractor license is not granted to a company in the abstract. It runs through a qualifying individual: a person who supplies the experience, passes the exam, and ties the license to the business. California calls this person a Responsible Managing Officer or Employee (RMO or RME); other states use terms like qualifying agent or license holder.
- The qualifying individual provides the experience and passes the trade and, where required, business and law exams.
- The license is then associated with the business entity, so your LLC is licensed through that person rather than on its own.
- If the qualifying individual leaves, the company may need a new one to keep the license active, which is worth planning for early.
Plan the qualifier before you file
Decide who carries the license before you apply. If it is you, your experience and exam anchor the company's license. If it is an employee, understand what happens to the license if they leave, so the business is not exposed.
The Address on Your License Application
The state license application records your company's business address, which is where the address you put on your LLC starts to matter. For a technician working out of a truck and a home garage, that creates a privacy question: the address on your formation papers and your license application can land on public records.
- License application address: the business address recorded with the licensing body, which becomes part of the public license record in many states.
- LLC registered agent address: official state and legal mail for the entity, which can be a professional address where the provider offers registered agent service.
- Business mailing address: license renewals, insurance certificates, and client paperwork can route to a professional address with mail scanning, so a renewal notice does not sit unread.
Before you put an address on a state application, run it through our free Address Checker to see how it is classified in USPS data, and read business license and virtual address rules for how license addresses and entity addresses differ. You can set up a professional business address through save office onboarding and pair it with a registered agent service in your state.
Expanding Into More States
HVAC licensing is state by state, so taking work across a state line usually means a second contractor license under that state's rules. Your LLC also needs to register as a foreign LLC in the new state before it can lawfully operate there, which is a separate filing from the license itself.
- A second state means a second license, with its own experience, exam, insurance, or bond requirements.
- Foreign qualification of the LLC comes first, and the new state will want an address and usually a registered agent there.
- The EPA 608 cards your technicians hold travel with them, since the federal certification is not state-specific, even though the contractor license is.
HVAC is one specialty trade among many, and the same two-layer logic applies to other licensed contractors. For the broader entity side of running a contracting business across states, see our guide on the general contractor LLC and business address.
An HVAC business is easier to set up once you hold the two layers apart. EPA Section 608 is a federal, personal certification that your technicians carry and that does not expire. The state contractor license belongs to the company, runs through a qualifying individual, and looks completely different from California's C-20 to Minnesota's bond-only approach. Get the 608 people in place, line up your qualifier, and license the company in each state you work.
The address layer deserves the same early attention. The license application records a business address, so put a professional, verifiable one on your filings, keep your home off public records where your state allows it, and route renewals and insurance mail somewhere it gets scanned and seen. To keep the entity addresses straight from day one, read registered agent address vs business address.
Frequently Asked Questions
