Ohio HVAC Contractor License Requirements (2026)

The Ohio Construction Industry Licensing Board (OCILB) under Ohio Revised Code Chapter 4740 issues the HVAC Contractor license, which is required for any person who contracts to perform commercial heating, ventilation, and air conditioning work in Ohio. The OCILB HVAC Section sets the experience, examination, bond, and insurance requirements; PSI Services administers the examination. Ohio also issues separate Hydronics and Refrigeration commercial licenses for those narrower scopes. Residential-only HVAC work is regulated at the municipal level and is outside the OCILB scope. Any work involving refrigerants additionally requires federal EPA Section 608 certification.

Regulatory Body Profile

Licensing for this trade is governed by Ohio Construction Industry Licensing Board (OCILB), the agency that issues and regulates the credential under Ohio Revised Code Chapter 4740; Ohio Administrative Code 4101:15 (OCILB rules). The Ohio Construction Industry Licensing Board, housed inside the Ohio Department of Commerce Division of Industrial Compliance, issues statewide commercial licenses for Electrical, Plumbing, HVAC, Hydronics, and Refrigeration contractors. Ohio has no statewide general contractor license — general building work is regulated at the municipal level.

Official portal: https://com.ohio.gov/divisions-and-programs/industrial-compliance/about-us/ocilb
Address: 6606 Tussing Road, Reynoldsburg, OH 43068
Phone: (614) 644-3493

The Eligibility Audit

The applicant must be at least 18 years of age and possess a valid Social Security Number. No Ohio residency requirement.

Good moral character

OCILB conducts a fitness review on every applicant. Felony convictions involving fraud, theft, or construction are reviewed individually under ORC 4740.06.

Background investigation

Mandatory criminal history disclosure on the application.

Experience and Education Standards

The experience bar is five years of experience as a tradesperson in the HVAC trade under ORC 4740.06, OR registration as an engineer under ORC Chapter 4733 with experience in HVAC construction, OR equivalent experience acceptable to the HVAC Section, and it must be backed by verifiable records — typically payroll, tax, project, or supervisor documentation covering the claimed period.

Accepted proof of experience or eligibility

OCILB Experience Verification Form signed by each prior employer or supervising licensed HVAC contractor
W-2 statements, pay stubs, or 1099 records covering the five-year qualifying period
Ohio professional engineer registration (where applicable)
Approved HVAC apprenticeship completion certificate (where applicable)

Education substitution

Registration as a professional engineer under ORC Chapter 4733 with HVAC construction experience may substitute for the tradesperson experience requirement. Accredited HVAC trade school programs are considered by the board on a case-by-case basis.

The Exam Syllabus

Testing is handled by PSI Services LLC (under contract to OCILB). The applicant has to pass each part listed here before the credential is granted:

Ohio HVAC Contractor Trade Examination — Ohio Mechanical Code (IMC-based) and Ohio Fuel Gas Code — 80 questions, 240 minutes, passing score 75%
Ohio HVAC Contractor Business and Law Examination — 50 questions, 120 minutes, passing score 75%

Examination fee: $70 per examination part paid to PSI on the day of testing.

Retake policy: Failed parts may be re-taken individually with a new fee. Applications remain valid for one year from OCILB approval to sit for the examination.

Bonding, Insurance & Financial Security

Before the license is issued, the applicant must file a $25,000 contractor license surety bond in the form prescribed by the OCILB.

General liability

Minimum $500,000 commercial general liability insurance required by ORC 4740.06(E). The certificate must name the OCILB as certificate holder.

Workers' compensation

Workers compensation coverage through the Ohio Bureau of Workers Compensation (BWC) is mandatory for any Ohio employer with one or more employees under ORC Chapter 4123.

Additional financial requirements

No net worth requirement. The $25,000 surety bond and the $500,000 liability minimum together serve as the financial responsibility test under ORC 4740.06.

Schedule of Fees

Fee	Amount
Application (non-refundable)	$25
Examination	$140
Initial license	$360
Renewal (every year)	$120

Renewal and Continuing Obligations

The Ohio HVAC Contractor (OCILB Commercial License) runs on a year renewal cycle. The current renewal fee is $120. Ohio OCILB commercial licenses renew annually. Late renewal carries a reinstatement fee under OAC 4101:15.

Continuing education: Ten hours of OCILB-approved continuing education each year, including at least one hour of Ohio law and rules specific to the HVAC trade.

Downloadable Asset

2026 Ohio HVAC License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Out-of-State Reciprocity

For this classification, Ohio does not recognize the NASCLA Accredited Examination.

Reciprocal State	Accepted Exam	Conditions
Kentucky	Trade exam waived	Bilateral OCILB–Kentucky reciprocity for active HVAC contractors in good standing.
West Virginia	Trade exam waived	Bilateral OCILB–West Virginia reciprocity for active HVAC contractors.
Louisiana	Trade exam waived	Bilateral OCILB–Louisiana State Licensing Board for Contractors reciprocity.
South Carolina	Trade exam waived	Bilateral OCILB–South Carolina Contractor's Licensing Board reciprocity.
Tennessee	Trade exam waived	Bilateral OCILB–Tennessee Board for Licensing Contractors reciprocity.

Ohio maintains bilateral commercial-trade reciprocity with Kentucky, West Virginia, Louisiana, South Carolina, and Tennessee. Reciprocal applicants must still pass the Ohio business and law exam and meet bond and insurance requirements.

Weighing more than one jurisdiction? The national hub compares HVAC license requirements in every state — exam, bond, fee, and experience thresholds side by side.

The Application Roadmap

Accumulate five years of HVAC experience. Five years as a tradesperson under ORC 4740.06, or PE registration with HVAC construction experience, or equivalent acceptable to the board.
Obtain EPA Section 608 certification. Federal refrigerant handling certification is required for any work involving refrigerants regardless of state license status.
Prepare experience documentation. OCILB Experience Verification Forms signed by each prior employer or licensed HVAC contractor covering the full five years.
Submit the OCILB application. File the HVAC Contractor application with the $25 application fee, experience documentation, and fitness disclosure.
Pass both PSI examinations at 75%. Score 75% or better on both the Trade exam and the Business and Law exam.
Post the $25,000 bond and obtain insurance. Submit a $25,000 surety bond and a certificate of insurance showing $500,000 general liability.
Receive the OCILB license. OCILB issues the commercial HVAC Contractor license. It renews annually.

Where Applications Stall

The errors below are the ones that most frequently cost Ohio HVAC applicants time, drawn from the cited board guidance.

Confusing residential with commercial scope

OCILB only licenses commercial HVAC work. Residential-only HVAC technicians are regulated by cities and do not need the OCILB license.

Skipping EPA 608

EPA Section 608 is federal and required before touching any refrigerant. OCILB does not enforce 608 but federal and insurance exposure applies immediately.

Confusing HVAC with Hydronics or Refrigeration

Ohio issues HVAC, Hydronics, and Refrigeration as three separate OCILB licenses. A contractor whose scope crosses categories must hold each applicable license.

Missing the 75% pass threshold

Ohio uses a 75% passing score — higher than many neighboring states. Candidates used to 70% thresholds frequently fall short on the first attempt.

Missing the annual renewal

Ohio commercial licenses renew every year — not every two or three years. Ten hours of CE including Ohio law and rules are required each cycle.

Pre-Application Checklist

Before submitting to OCILB, the applicant should have each of the following ready:

☐ Five years of HVAC experience documented on OCILB Experience Verification Form
☐ EPA Section 608 certification
☐ OCILB HVAC Contractor application with $25 fee
☐ PSI Trade exam pass certificate at 75%+
☐ PSI Business and Law exam pass certificate at 75%+
☐ $25,000 OCILB surety bond
☐ $500,000 commercial general liability certificate naming OCILB as holder

Recommended Study Materials

These materials are drawn from the regulator's own citations and the references applicants commonly use to prepare. CLR receives no compensation for listing them.

Ohio Mechanical Code (IMC-based, Ohio-adopted edition) — International Code Council / State of Ohio. Primary technical reference. Open-book at the PSI test center.
Ohio Fuel Gas Code (Ohio-adopted edition) — International Code Council / State of Ohio. Required for gas-fired equipment.
Ohio Revised Code Chapter 4740 and OAC 4101:15 — State of Ohio. Licensing law and rules.

Other Ohio Trade Licenses

For a different Ohio credential, see these companion guides published by CLR:

Common Questions

When does Ohio require an OCILB HVAC Contractor license?

Any person who contracts to perform commercial HVAC work in Ohio must hold an OCILB HVAC Contractor license under ORC 4740.02. Residential-only HVAC is regulated at the municipal level.

Is the Ohio HVAC license the same as Hydronics or Refrigeration?

No. OCILB issues HVAC, Hydronics, and Refrigeration as three separate commercial licenses. A contractor whose scope includes hot-water boiler systems or standalone commercial refrigeration may need the additional license.

Is EPA Section 608 required?

Yes. Federal Section 608 certification is required for any work involving refrigerants regardless of state license status.

What bond and insurance does Ohio require?

A $25,000 surety bond and $500,000 commercial general liability insurance under ORC 4740.06. Workers compensation through Ohio BWC is mandatory for any employer.

Does Ohio reciprocate HVAC contractor licenses?

Yes. OCILB maintains bilateral reciprocity agreements with Kentucky, West Virginia, Louisiana, South Carolina, and Tennessee. Reciprocal applicants still must pass the Ohio business and law exam.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-05-22 · Next scheduled review 2026-08-20