HVAC contractor license requirements in Ohio.
Ohio licenses commercial HVAC contractors through the Ohio Construction Industry Licensing Board — the same board that handles plumbing and electrical. The state license covers commercial work; residential and journeyman-level requirements are set by cities and counties.
What Ohio requires.
HVAC Contractor (state license)
Issued by OCILB for commercial HVAC contracting — the state credential the business runs on.
Local licenses
Cities and counties set their own HVAC requirements for residential and technician-level work.
Getting the HVAC Contractor
- Five years of experience as an HVAC tradesperson immediately before applying — or three years as a registered engineer in the HVAC field
- Document that experience with records such as permits and W-2s
- Pass two open-book exams through the board’s testing vendor: the HVAC Contractor trade exam and the Business and Law exam, at 70% or better
- Carry at least $500,000 in contractor liability coverage
- Hold federal EPA Section 608 certification to handle refrigerants
- · As with plumbing, the OCILB license is the commercial credential — check the city or county for residential and journeyman requirements.
The official board
Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce
Visit the boardVerified 2026-08 against the sources below. Licensing rules change — confirm with the board before relying on this page.
Ohio HVAC licensing FAQ.
Do you need a license to do HVAC work in Ohio?
For commercial work, yes — Ohio requires an HVAC contractor license from the Ohio Construction Industry Licensing Board. Residential and technician-level requirements are set locally, so check the city or county where you work.
How much experience do you need for an Ohio HVAC license?
Five years as an HVAC tradesperson immediately before you apply, or three years if you are a registered engineer in the field. You document it with records such as pulled permits and W-2s.
What exams does the Ohio HVAC contractor license require?
Two, both open book and administered through the board’s testing vendor: an HVAC trade exam covering refrigeration, heating, ventilation, air distribution, piping, equipment, and testing, plus a Business and Law exam. You need at least 70% on each.
Do Ohio HVAC contractors need EPA certification?
Yes, if you handle refrigerants — federal EPA Section 608 certification is required on top of the state license. Ohio also requires at least $500,000 in contractor liability coverage.
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