Ohio HVAC Exam Prep

In Ohio, the Ohio Construction Industry Licensing Board (OCILB) licenses HVAC contractors for commercial heating, ventilation, and air-conditioning work. OCILB covers only five trades (electrical, HVAC, refrigeration, plumbing, and hydronics), and Ohio has no statewide general contractor license, so HVAC is one of the few construction trades with a true state credential. Candidates take two computer-based PSI exams: the HVAC Trade exam and the Business & Law exam.

The exams reference the Ohio Mechanical Code, part of the OAC 4101:1 referenced standards and based on the International Mechanical Code; confirm the current edition at codes.ohio.gov before studying. Anyone who services or disposes of refrigerant-containing equipment also needs federal EPA Section 608 technician certification, which is separate from and in addition to the OCILB license.

Ohio recognizes the following HVAC-related credential types:

• HVAC Contractor (OCILB State License) - Commercial heating, ventilation, and air-conditioning contracting.
• Refrigeration Contractor and Hydronics Contractor - Separate OCILB licenses with the same application and exam structure.
• Technician / Helper - No statewide journeyman HVAC credential; helper and technician credentials are local or voluntary.

The Ohio HVAC contractor examination consists of two computer-based PSI exams: the HVAC Trade exam and the Business & Law exam. Review the current PSI Candidate Information Bulletin for question counts, time limits, and reference rules before your test date.

Ohio does not publish a passing score for the OCILB exams on the state page. Prep providers cite 70 percent, but confirm the current passing standard in the PSI Candidate Information Bulletin before scheduling.

Typical requirements to sit for the Ohio HVAC contractor exam include:

• Being at least 18 years old.
• 5 years of trade experience (or a current Ohio registered PE with 3 years of construction business experience, or 5 years as an Ohio government inspector in the trade).
• Tax-document proof of experience (W-2s or Schedule C) plus permits, a journeyman card, an apprenticeship certificate, or 40 hours of OCILB code continuing education.
• A BCI and FBI background check after Board approval.
• $500,000 in contractor liability insurance.

Requirements can change. Always confirm current licensing rules with the official state licensing authority before applying.

OCILB charges a $25 application fee per trade and a $25 license issuance fee per trade, with a $60 per year escrow (inactive) renewal fee. The PSI exam fee is paid to PSI; prep providers cite about $69 per exam, but confirm in the PSI Candidate Information Bulletin. Always confirm current fee amounts with OCILB or PSI before submitting payment.

A focused 4 to 6 week study plan works well for most candidates:

• Week 1-2: Review the fundamentals of EPA 608 Certification and Refrigeration and Air Conditioning.
• Week 3-4: Work through Heating Systems, the Ohio Mechanical Code, and Business & Law topics, then take a full-length practice test.
• Week 5-6: Review every missed question, drill weak areas, and simulate exam timing.

Practice topics on ExamsLib cover EPA 608 Certification, Refrigeration and Air Conditioning, Heating Systems.