How to Get an HVAC License in Ohio (2026 OCILB Guide)

Ohio licenses HVAC contractors at the state level for commercial work, not HVAC technicians and not residential jobs, which cities and counties handle on their own. The Ohio Construction Industry Licensing Board (OCILB) issues the heating, ventilating and air conditioning contractor license after five years in the trade, a passing score on two PSI exams, $500,000 in contractor liability coverage and two $25 board fees. For the full picture of how the state treats construction trades, see the Ohio contractor license requirements, and for every other state, see how contractor licensing works nationwide.

At a glance Issued by: the OCILB, part of the Ohio Department of Commerce, through its HVAC and refrigeration section. Who needs it: HVAC contractors on commercial projects. Residential rules are set locally. Experience: five years as an HVAC tradesperson, or an Ohio registered engineer with three years of business experience in the trade. Exams: a PSI HVAC exam (100 scored questions, 4 hours) and a Business and Law exam (50 scored questions, 2 hours), 70 percent required on each. Fees: $25 to apply, $69 per PSI exam registration, $25 to issue the license, $60 a year to renew.

Who Needs an Ohio HVAC Contractor License

Ohio law bars anyone from acting as, or claiming to be, a type of contractor the chapter licenses unless that person holds, or has been assigned, a license in that trade (ORC 4740.13). A contractor is defined as the individual or company responsible for the means, method and manner of the work, whether they perform it themselves or employ the tradespeople who do (ORC 4740.01). Heating, ventilating and air conditioning is one of the five trades the OCILB licenses.

The statute's definition of a "construction project" excludes residential buildings, which is why the OCILB calls its license a credential for commercial contractors and notes that a local building department may still require the same license, or its own registration, for residential work.

A technician who works for a licensed company needs no license of their own, as long as they are on that company's W-2 payroll or placed through a nationally recognized temporary agency. A worker paid on a 1099 must hold a state license in the trade.

HVAC, Refrigeration, Hydronics or Plumbing: Choosing the Right License

The OCILB splits commercial mechanical work into four separate licenses, each with its own PSI exam, so a company that performs commercial HVAC and plumbing work needs a license in each trade. Ohio does not issue a single "mechanical contractor" license; a company that markets itself as a full-service mechanical contractor is, in the state's eyes, a company that holds several of these OCILB licenses at once.

Refrigeration versus HVAC: PSI's exam content limits the refrigeration license to systems built for food and product preservation and states plainly that these are not comfort systems. Comfort heating and cooling, including ductwork, sits under the HVAC license.

Plumbing and electrical: each is its own OCILB license with its own PSI exam; see the Ohio plumbing license guide and the Ohio electrician license guide for those paths.

EPA 608: refrigerant work under any of these licenses still needs a separate federal technician card, covered later in this guide.

OCILB Requirements for the HVAC License

The qualifications come from ORC 4740.06, last amended September 30, 2025, and rule OAC 4101:16-2-01, updated September 6, 2024.

Background checks: once the board approves your application, you complete state and federal checks before you can sit for either exam. The results go directly to the OCILB and stay valid for one year.

Documenting Five Years of HVAC Experience

The application calls for tax documents covering the last five consecutive years, such as W-2s, a Schedule C or a Schedule K-1, plus one of four proofs of hands-on work:

• A permit pulled by the licensed contractor you worked under for each of the last five years (sewer, water, gas service and drain cleaning permits do not count)
• An active journeyman card in the trade
• A certificate of completion from an apprenticeship approved by Ohio or the U.S. Department of Labor
• 40 hours of live or webinar code courses in the trade from an OCILB approved provider, dated within one year of the application; self paced courses do not qualify

Most of the five years must be spent as an HVAC tradesperson. Counter sales, purchasing, inventory, clerical and bookkeeping work does not count toward it, and neither does general contractor experience outside the trade (OAC 4101:16-2-01).

Other accepted experience: five years in the trade that are not the most recent five, provided at least three were construction work and up to one year came from education; five years as an Ohio government inspector in the trade; or the last five years as a full time owner, partner or employee of a licensed commercial HVAC company.

Military service: under ORC 4740.06(D), an applicant who spent at least three of the last five years doing substantially similar work in the uniformed services can qualify to test. Veterans attach a DD214 to the application.

The Two PSI Exams

OCILB contracts with PSI to deliver both exams by computer, at centers across Ohio and in other states. The rule sets the pass mark at 70 percent on each part, so a strong trade score cannot offset a weak Business and Law score (OAC 4101:16-2-03).

What the HVAC exam covers: PSI's current content outline splits the 100 scored questions across seven subject areas.

Open book references: the HVAC exam allows the 2021 International Fuel Gas Code, the 2024 Ohio Mechanical Code and Modern Refrigeration and Air Conditioning, 22nd Edition. Bring your own copies; you may highlight and tab them but may not write in them. For Business and Law, PSI supplies the NASCLA Ohio 4th Edition guide at the test center, so there is nothing to bring for that half.

Retakes: after a failed attempt you wait 60 days before retesting, and the rule caps you at five attempts a year before you must file a new application (ORC 4740.06(G)). You retake only the half you failed. A Business and Law pass is good for three years if you later test in a second trade, so a company adding refrigeration or hydronics inside that window skips that half of the exam.

For registration steps, ID rules and scheduling windows, see how to schedule the contractor exam with PSI, Prov and Pearson VUE.

What It Costs to Get Licensed

The board fees come from OAC 4101:16-2-09, which makes every one of them nonrefundable, and the exam fee comes from the PSI candidate bulletin.

Notes: PSI charges $69 for each registration, whether it is a first attempt or a retake, and will not refund or transfer it. Checks to the board are payable to Treasurer, State of Ohio, and a returned check adds a $30 penalty per license. The reactivation fee sits in OAC 4101:16-2-12; the name change fee is on the board's application checklist.

The Licensing Steps in Order

1. Confirm you meet the five year experience rule, or one of the other routes described above.
2. Gather five years of tax documents plus one of the four experience proofs.
3. Mail the notarized OCILB examination application with the $25 fee, naming the company the license will be assigned to and your position there.
4. Wait for the board's decision by mail. Approval is valid for one year.
5. Complete the BCI and FBI background checks and have the results sent to the OCILB.
6. Register with PSI and pay $69 for each exam registration.
7. Pass the HVAC exam and the Business and Law exam at 70 percent or better on each.
8. Send the OCILB your passing results, the $25 license fee and a certificate of liability insurance naming the OCILB as certificate holder, within twelve months of passing.
9. The HVAC section authorizes your license within 30 days of your exam date; it issues in your name and assigns it to your company (OAC 4101:16-2-04).
10. Put the license number on ads, business cards and vehicles that carry the company name, then check the registration rules in each city where you plan to pull permits.

Insurance and Workers' Compensation

The license requires at least $500,000 in contractor liability coverage, including completed operations. Once the license is assigned to a company, the policy must carry that company's name, and the company must be registered with the Ohio Secretary of State (OAC 4101:16-2-09).

You no longer send proof of insurance with each renewal, but you do certify that coverage is in force. For other states, see contractor insurance requirements by state.

Ohio's workers' compensation law covers the employees of any business that regularly employs one or more people (ORC 4123.01). Private employers not approved to self insure pay premiums into the state insurance fund (ORC 4123.35).

EPA Section 608 Certification Is a Separate Requirement

The OCILB license does not certify anyone to open a refrigerant circuit. Federal rules under Section 608 of the Clean Air Act require any technician who maintains, services, repairs or disposes of equipment that could release refrigerant to hold a federal certification (EPA Section 608 Technician Certification).

Apprentices: an apprentice is exempt only while a certified technician closely and continually supervises the work. Certified technicians keep a copy of their certificate at their place of business (40 CFR 82.161).

EPA does not issue the cards itself; an EPA approved certification program does. We compare the two credentials in EPA 608 certification vs. an HVAC license.

Renewal, Continuing Education and Inactive Status

An OCILB license expires each year on the anniversary of the original license date, and you can renew as early as 90 days ahead without retesting (ORC 4740.06(H)).

Which courses count: an HVAC licensee may take any course approved by any specialty section of the board, including refrigeration or hydronics courses, and unused hours do not carry over to the next year (OAC 4101:16-2-08). That is why a company running both an HVAC and a refrigeration license can mix its continuing education between the two without tracking them separately.

Compliant contractor program: after one full year of clean compliance with the chapter, you may apply at renewal time; membership cuts the yearly CE requirement by two hours and opens the option of a three year renewal cycle instead of an annual one (OAC 4101:16-1-08).

Missed renewal: the license suspends automatically. You can reactivate within one year by paying the renewal and late fees, certifying insurance and finishing the hours. After more than one year lapsed, you reapply and retest from scratch.

Coming back from inactive status: you complete no more than ten hours for each inactive year, capped at thirty total (eight and twenty four for program members), certify insurance and pay $60 (OAC 4101:16-2-12). For other states, see contractor continuing education requirements by state.

Reciprocity for Ohio HVAC Contractors

Ohio issues a license without examination to someone already licensed in a state that has a written reciprocity agreement with the board and requirements substantially equal to Ohio's, after a background check and the $25 issuance fee (OAC 4101:16-2-10). The board extends this only to applicants who passed the recognized exam in that state, not to anyone grandfathered in.

Out of state route to the exam: someone holding a substantially similar license in another state may qualify to test by showing at least five permits issued under that license, one tax return showing income earned under it, and an Ohio registered employer there as a foreign corporation or LLC (ORC 4740.06(C)).

How the License Attaches to Your Company

Ohio issues the license to a person, then assigns it to a company. Every applicant must ask, at the time of applying, that the license be assigned to the contracting company that employs them; the company's license then names that individual and their position (ORC 4740.07).

All work under the assigned license is treated as done under that person's personal supervision, and any violation is charged to them directly. That person must be actively engaged in the HVAC business and readily available for consultation with the company. A license attaches to only one company at a time, and the board allows no DBAs.

When the licensed person leaves: the assignment ends 90 days after they file a change of company form, or sooner if the company and the person agree, and a signed letter of release lets the board reassign the license immediately. A company that has a second person's HVAC license already assigned to it keeps operating under that one.

The qualifier angle: a qualifying agent QUALIFIES a company as an owner or full time W-2 employee who genuinely supervises the work; see what a qualifying agent is and how to hire one. If your company does commercial HVAC work and no one on staff can qualify yet, placing a licensed HVAC contractor on staff to assign their license and supervise the work is a lawful path, and our contractor qualifier services cover exactly that placement. The Licensing Company, led by founders Marshall Schofield and Jeremiah Jaskulski, places qualifying agents on that basis; see how it works for HVAC contractors.

Local Rules After the State License

A city may not charge a contractor registration or license fee unless it also requires the state license in that trade, though it may still register individual tradespeople and charge them a fee of its own (ORC 4740.12).

Columbus example: HVAC contractors working in Columbus must first hold the State of Ohio license in the trade, and the city does not require separate board approval for OCILB contractors (City of Columbus Contractor Licenses). Statewide, the OCILB says a license may never be used to pull permits on behalf of an unlicensed competitor.

Working Without a License

Acting as, or claiming to be, a licensed HVAC contractor without a license is a minor misdemeanor the first time and a misdemeanor of the fourth degree after that (ORC 4740.99). The attorney general may also seek an injunction at the board's request.

HVAC contractors may install and service control wiring under 25 volts for equipment tied to their license without a separate electrical license (ORC 4740.13(C)).

Frequently Asked Questions

Do I need a license to do residential HVAC work in Ohio?

The state license is written for commercial construction projects, which exclude residential buildings by definition. Your city or county building department may still require the OCILB license, or its own registration, for residential work, so ask before you pull a permit.

How long does it take to get an Ohio HVAC license?

Board approval, background checks and PSI scheduling come first, and approval lasts one year from the date it is granted. Once you pass both exams, the HVAC section authorizes the license within 30 days of your exam date.

How much does an Ohio HVAC license cost?

The board charges $25 for the examination application and $25 to issue the license, and PSI charges $69 for each exam registration. Renewal runs $60 a year, or $180 every three years for compliant contractor program members.

How hard is it to get an HVAC license in Ohio?

The experience bar is the main hurdle: five years as an HVAC tradesperson, documented with tax records and one of four proofs, before the board will even approve you to test. Once approved, the exams themselves require a 70 percent pass mark on two open book tests, which rewards candidates who study the PSI content outline rather than guess.

What separates a full-service mechanical contractor from a standard HVAC company in Ohio?

Ohio has no single "mechanical contractor" license. A company that calls itself full-service mechanical typically holds more than one OCILB license, commonly HVAC plus plumbing or hydronics, each earned through its own five year experience proof and its own PSI trade exam.

Can I get an Ohio HVAC license without five years of experience?

Yes, through two routes: the Ohio registered engineer path, or at least three of the last five years in substantially similar uniformed service. The other accepted experience routes still require five years in some form. If your company needs the license sooner, placing a licensed HVAC contractor on staff as a full time W-2 employee who supervises the work and assigns their license is a lawful alternative.

Do I still need EPA 608 certification with an Ohio license?

Yes, if you or your technicians open refrigerant circuits. EPA 608 is a federal technician certification, and the OCILB license is a state contractor license; holding one does not substitute for the other.

Next Step for Ohio HVAC Companies

If you plan to hold the license yourself, book your PSI exams as soon as the board approves you and your background checks clear. If your company needs an assigned HVAC license before anyone on staff qualifies, call 615-219-2110 or hire a qualifying agent and we will walk you through a compliant Ohio setup. See also the Ohio general contractor license guide and getting licensed without the experience.

Sources

Every source below was opened and read on 2026-10-22.

• Ohio Construction Industry Licensing Board: Contractors and Contracting Companies
• OCILB Examination Application (form revised 9/2025)
• PSI Candidate Information Bulletin, OCILB Contractor Trade Examinations (updated 2/7/2024)
• Kentucky Reciprocity Application, OCILB
• South Carolina Reciprocity Application, OCILB
• Alabama Reciprocity Application, OCILB
• Louisiana Reciprocity Application, OCILB
• Mississippi Reciprocity Application, OCILB
• Tennessee Reciprocity Application, OCILB
• West Virginia Mechanical Reciprocity Application, OCILB
• Ohio Revised Code 4740.01, definitions
• Ohio Revised Code 4740.06, qualifications, exams and renewal (amended September 30, 2025)
• Ohio Revised Code 4740.07, licenses assigned to contracting companies
• Ohio Revised Code 4740.12, local regulation
• Ohio Revised Code 4740.13, operating without a license
• Ohio Revised Code 4740.99, penalty
• Ohio Administrative Code Chapter 4101:16-1, including the compliant contractor program
• Ohio Administrative Code Chapter 4101:16-2, licensing, exams, fees, renewal and reciprocity
• Ohio Revised Code 4123.01, workers' compensation definitions
• Ohio Revised Code 4123.35, employer premiums
• U.S. EPA: Section 608 Technician Certification
• U.S. EPA: Types of Section 608 Technician Certification
• 40 CFR 82.161, technician certification (law.cornell.edu, eCFR blocked automated access on retrieval date)
• City of Columbus: Contractor Licenses
• Ohio General Assembly: House Bill 614, 136th General Assembly (Second Chance Safety Act, unrelated to contractor licensing, checked to rule out a claim circulating on other sites)