What License Do You Need to Start an HVAC Business? State Rules for 2026

To start an HVAC business you need four things: the HVAC contractor license your state requires, a qualifier who meets the experience and exam rules and qualifies your company, EPA Section 608 certification for every technician who handles refrigerant, and whatever business registration your city, county or state asks for. If you do not hold the license yourself, a licensed qualifier can fill the second layer for you.

This guide walks through each layer and then looks at six states (Texas, Florida, California, Arizona, North Carolina and Ohio), using only the statutes, rules and board pages each state publishes. Our contractor license guide covers the other states, and how to get an HVAC contractor license goes deeper on the application itself.

At a glance

• Texas: TDLR says air conditioning, refrigeration and heating contractors must hold a TDLR license, and ACR companies must employ an ACR contractor in each permanent location (TDLR).
• Florida: a business organization applies for registration or certification through its qualifying agent, and a business tax receipt is not a license (Florida Statutes 489.119 and 489.127).
• California: a CSLB license is required when a permit is needed, any additional workers are used, or a contract reaches $1,000 in labor and materials (CSLB).
• Federal: EPA Section 608 certification is required for technicians who maintain, service, repair or dispose of equipment that could release refrigerants, and the credential does not expire (EPA).

The four layers of an HVAC start up

Think of the license question as four separate boxes.

1. The state or local contractor license. This is the license that lets your company contract for HVAC work. In each state below, a state agency or board issues it.
2. A qualifier for the company. Most systems tie the company to an individual who has the experience, passed the exam and is responsible for the work. States call that person a qualifying agent, qualifying party or qualifier.
3. EPA Section 608 certification. This is federal, not state. It applies to the technicians who touch refrigerant, and it is separate from your contractor license. Our guide to EPA 608 certification versus an HVAC license explains how the two fit together.
4. Business registration. Your state, city or county may require a local business license or tax receipt before you can open. That registers the business. It is not permission to do HVAC work, as contractor license vs business license explains.

State by state: what six states require

The table gives the shape of each state's rule, and the notes carry the statute or board language. We opened every source on October 12, 2026. Confirm any figure with the board before you file.

Texas: TDLR Class A and Class B

• The Texas contractor license page is the starting point, and our Texas HVAC license guide covers the details.
• TDLR's air conditioning and refrigeration page states that contractors who install, repair or maintain air conditioning, refrigeration or heating systems must have a TDLR license, and that ACR companies must employ an ACR contractor in each permanent location.
• A Class A license covers any size unit. A Class B license covers cooling systems of 25 tons and under and heating systems of 1.5 million BTUs per hour and under.
• TDLR requires 48 months of practical experience under a licensed contractor within the past 72 months, or a technician certification held for 12 months plus 36 months of supervised experience within the past 48 months.

Florida: certified Class A and Class B

• Florida's contractor license rules sit in Chapter 489. Our Florida HVAC license guide and mechanical contractor license guide go further.
• Section 489.105 defines a Class A air-conditioning contractor as one whose services are unlimited, and a Class B contractor as one limited to 25 tons of cooling and 500,000 Btu of heating in any one system.
• Section 489.111 makes a person eligible for licensure by examination with at least 4 years of active experience as a worker who learned the trade by serving an apprenticeship, with 1 year as a foreman, or by the statute's degree route.
• For a business, section 489.119 requires the applicant to apply for registration or certification as the qualifying agent of the business organization. If the qualifying agent is the only certified or registered contractor and leaves, the business has 60 days to employ another.
• Section 489.127 says a business tax receipt is not a license for purposes of the part. Under 489.127(2), a first violation is a first degree misdemeanor, a violation after a prior guilty finding is a third degree felony, and a violation during a Governor-declared state of emergency is a third degree felony even on a first offense. See unlicensed contracting during a state of emergency.

California: the C-20 classification

• See our California contractor license page and the California HVAC guide.
• The CSLB requires a license when a project needs a building permit, uses any additional workers, or has a total cost of $1,000 or more for labor and materials on one or more contracts.
• HVAC work falls under the C-20 classification, which CSLB describes as fabricating, installing, maintaining, servicing and repairing warm-air heating, ventilating and air-conditioning systems.
• CSLB says an applicant must take and pass two examinations, law and business and trade. Its sole owner application page says the qualifier must have at least four years of experience within the last ten years as a journeyperson, foreperson, supervising employee or contractor in the trade.
• On a corporate license the qualifier is an officer (the RMO) or a responsible managing employee (the RME). An RME must be a bona fide employee working at least 32 hours a week or 80 percent of the business hours, whichever is less, and generally may qualify only one active license at a time. Read more in RMO vs RME in California.

Arizona: the qualifying party

• Read the Arizona contractor license page and our Arizona HVAC guide for the classifications.
• A.R.S. 32-1151 makes it unlawful to act as a contractor without a license in good standing. Section 32-1121 exempts casual or minor work with an aggregate contract price under $1,000, unless a local building permit is required.
• Under 32-1101, the qualifying party is responsible for the licensee's actions and either has an ownership interest in the license or is regularly employed by the licensee.
• Section 32-1122 requires that person to have at least four years of practical or management trade experience, at least two within the last ten years, and to show qualification by written examination, which the Registrar waives in some cases.

North Carolina: heating groups one, two and three

• Start with the North Carolina contractor license page and the North Carolina HVAC guide. HVAC is licensed by the State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors, not the general contractor board.
• G.S. 87-21 defines heating group number three as a system of 15 tons or less of mechanical refrigeration capacity, and places systems installed in single-family residences in group three regardless of size. Group number two covers systems over fifteen tons, and group number one covers steam, vapor or hot water heating systems.
• The statute lists the installation or replacement of condensing units, air handlers, gas furnaces, package units and boilers as covered work, and excludes minor repairs and minor replacements to an already installed system.
• The Board's applicant page requires 2 years (4,000 hours) of on site full-time experience for the contractor exam, with up to half allowed from related academic or technical training. Under G.S. 87-21 the exam has two parts, a business and law portion and a technical portion.

Ohio: individual license assigned to a company

• Ohio's contractor license page and our Ohio HVAC guide cover the board in more detail.
• ORC 4740.01 defines a license as one the Ohio construction industry licensing board issues to an individual as a heating, ventilating and air conditioning, refrigeration, electrical, plumbing or hydronics contractor.
• ORC 4740.06(B) says an applicant must be at least eighteen, and have been a tradesperson in the trade for not less than five years, or be a registered Ohio engineer with three years of construction business experience in the trade, or have other experience the board accepts.
• OAC 4101:16-2-09(D) requires license holders to carry contractor's liability insurance with complete operations coverage of at least $500,000. If the license is assigned to a business entity, the policy is in the entity's name.
• ORC 4740.07 has the board issue the license in the individual's name and assign it to the contracting company. It may not be assigned to more than one company at a time, and the individual must be actively engaged in business as that type of contractor and readily available for consultation (4740.07(G) and (H)).
• If the contractor leaves, the assignment becomes invalid 90 calendar days after the contractor completes a change of company form, or at an earlier time the company and contractor agree (4740.07(D)(1)).

EPA Section 608 certification

Section 608 comes from the Clean Air Act and the rule at 40 CFR Part 82, Subpart F. EPA says technicians who maintain, service, repair or dispose of equipment that could release refrigerants must be certified. EPA defines a technician as someone who attaches and detaches hoses and gauges to measure pressure, adds or removes refrigerant, or does any other activity that violates the integrity of a motor vehicle air conditioner (MVAC)-like appliance or small appliance (other than disposal). EPA offers four certification types:

• Type I for small appliances.
• Type II for high or very high pressure appliances.
• Type III for low pressure appliances.
• Universal for all types of equipment.

Technicians must pass an EPA-approved test given by an EPA-approved certifying organization. EPA states that Section 608 credentials do not expire, and that apprentices are exempt provided a certified technician closely and continually supervises them. A state contractor license does not replace this certification, and the certification does not make you a licensed contractor.

Practical steps for a new HVAC owner

1. Name your state and your city. Look up the board that licenses HVAC where you will work.
2. Decide who will be your qualifier. If you hold the experience, you can apply yourself. If you do not, states such as Arizona and California let an owner or a regular employee serve as the qualifier.
3. Get EPA 608 certification for your technicians before they handle refrigerant.
4. Register the business. File with your state, then ask your city or county clerk what local business license or tax receipt applies. Florida's business tax receipt is one example, and it is not a license.

Frequently asked questions

Do I need an HVAC license if I only do repairs? It depends on the state and the work. North Carolina excludes minor repairs and minor replacements to an already installed system from its statute, while installing or replacing equipment such as condensing units and furnaces is covered. Texas requires a license for non-exempt air conditioning contracting work. Check your board's definition of repair before you take the job.

Is EPA 608 the same as an HVAC license? No. EPA 608 is a federal certification for technicians who handle refrigerant. An HVAC contractor license is a state or local permission to contract for the work. You usually need both, and one does not stand in for the other.

Can my company operate if the licensed person leaves? Not freely. Florida gives a business 60 days to employ another qualifying agent if its only certified contractor leaves. In Ohio an assignment becomes invalid 90 calendar days after the contractor completes a change of company form, unless the two agree to an earlier date. Our guide to the qualifier contingency plan covers what to do before it happens.

Does the qualifier have to be an owner? Not always. Arizona allows a qualifying party who either owns part of the license or is regularly employed by the licensee. California allows an officer or a bona fide employee who works at least 32 hours a week or 80 percent of the business hours, whichever is less. Read does a qualifier have to be an owner or an employee for the pattern across states.

If you do not hold the license yet

Many owners start an HVAC company with strong field skills and no contractor license in their name. A qualifying agent qualifies the company as an owner or a full time W-2 employee who supervises the work, so the business meets the board's rule while it grows. Read what a qualifying agent is, see the HVAC contractor qualifying agent guide for the license, exam and EPA 608 by state, and visit Hire a qualifying agent if you need one now. Our contractor qualifier services page describes how the placement works, and we offer licensing services in all 50 states.

Talk to people who hold these licenses

Marshall Schofield and Jeremiah Jaskulski are licensed general contractors, master electricians, master plumbers and master mechanical, and they read a board's rule the way a board reads it. To learn which license and qualifier fit your state, call 615-219-2110 or start at Hire a qualifying agent.

Sources

All sources were opened and read on October 12, 2026.

• Texas Department of Licensing and Regulation, Air Conditioning and Refrigeration Contractors, retrieved October 12, 2026
• Texas Department of Licensing and Regulation, Apply for a Contractor License, retrieved October 12, 2026
• Texas Department of Licensing and Regulation, ACR Frequently Asked Questions, retrieved October 12, 2026
• Florida Statutes 489.105, Definitions (2026), retrieved October 12, 2026
• Florida Statutes 489.111, Licensure by examination (2026), retrieved October 12, 2026
• Florida Statutes 489.119, Business organizations; qualifying agents (2026), retrieved October 12, 2026
• Florida Statutes 489.127, Prohibitions; penalties (2026), retrieved October 12, 2026
• California Contractors State License Board, Applicants (law and business and trade examinations), retrieved October 12, 2026
• California Contractors State License Board, Step 1: Before Applying for the Examination, retrieved October 12, 2026
• California Contractors State License Board, Step 3: Qualifying Experience for the Examination, retrieved October 12, 2026
• California Contractors State License Board, C-20 Warm-Air Heating, Ventilating and Air-Conditioning, retrieved October 12, 2026
• California Contractors State License Board, Apply for a Sole Owner License, retrieved October 12, 2026
• Arizona Revised Statutes 32-1101, Definitions, retrieved October 12, 2026
• Arizona Revised Statutes 32-1121, Persons not required to be licensed, retrieved October 12, 2026
• Arizona Revised Statutes 32-1122, Qualifications for license, retrieved October 12, 2026
• Arizona Revised Statutes 32-1151, Engaging in contracting without license prohibited, retrieved October 12, 2026
• North Carolina General Statutes 87-21, Definitions; contractors licensed by Board, retrieved October 12, 2026
• North Carolina State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors, Applicant Information, retrieved October 12, 2026
• Ohio Revised Code 4740.01, Construction industry licensing board definitions, retrieved October 12, 2026
• Ohio Revised Code 4740.06, License application, retrieved October 12, 2026
• Ohio Revised Code 4740.07, Licenses issued to individuals, retrieved October 12, 2026
• Ohio Administrative Code 4101:16-2-09, Fees and insurance, retrieved October 12, 2026
• U.S. EPA, Section 608 Technician Certification Requirements, retrieved October 12, 2026