Louisiana to Ohio: master HVAC technician license reciprocity
Ohio has a reciprocity agreement with Louisiana: a Louisiana master HVAC technician can get a Ohio license without retaking the trade exam.
Reference only, not legal advice. Rules change; confirm with the licensing board before you apply. Full disclaimer.
Reciprocity with Louisiana (unlimited mechanical license; Ohio Business and Law exam required)
A signed state-to-state agreement. The trade exam is waived; you apply, prove your history, and pay the fee.
OCILB lists Louisiana for Electrical, HVAC and Refrigeration reciprocity with the Business and Law (B&L) exam required. An applicant who currently holds a Louisiana Unlimited Mechanical license (HVAC or refrigeration) issued by the Louisiana State Licensing Board for Contractors after passing the Louisiana exam has the Ohio trade examination waived but must pass the Ohio Business and Law exam. Applicants whose Louisiana license came by grandfathering or reciprocity must apply to take the full Ohio exam. The applicant files the Louisiana reciprocity application (separate application and $25 fee per trade), a Reciprocity Verification of Licensure completed under seal by the Louisiana board, a $500,000 certificate of liability insurance naming OCILB, and assigns the license to a contracting company.
The B&L requirement comes from the 'Reciprocity with other states' list on OCILB's contractors page; the Louisiana form itself mentions the Business and Law exam only for grandfathered or reciprocity-obtained licenses. Confirm with OCILB which applies.
At a glance
- Trade exam
- Waived
- Law / code exam
- Required
- Agreement
- Active
What you must already have
- Your Louisiana license must have been obtained by examination, not by reciprocity or grandfathering.
- Your Louisiana license must be active and in good standing.
- You must have no disciplinary action or unresolved complaints on your record.
What you'll do to get licensed in Ohio
- 1Application fee. Pay the application fee ($25). Reciprocity application fee, non-refundable, per trade.
- 2Law / code exam. Pass a law, rules, or code exam. Ohio Business and Law examination (PSI).
- 3Insurance. Carry the required insurance ($500,000). Certificate of liability insurance of at least $500,000, certificate holder OCILB.
- 4Other. Reciprocity Verification of Licensure completed under seal by the Louisiana board, including exam score.
- 5Other. Assignment of the license to a contracting company (R.C. 4740.01).
- 6Other. EPA Section 608 technician certification to handle refrigerants; federal, does not expire.
Published fees on this path total $25, excluding exam-vendor fees, bonds, and insurance.
What you'll need to buy or arrange
Exam preparation
Most boards contract PSI, Prov, or ICC for exams. Check which code edition the exam is written to before buying a prep course.
- Law / code exam
- Other
Liability insurance
Some states require proof of general liability or workers' compensation coverage at licensing time.
- Insurance · $500,000
How Ohio licenses master HVAC technicians
Ohio master HVAC technician · “HVAC Contractor / Refrigeration Contractor (OCILB state license)”
Statewide license
Issued by Ohio Construction Industry Licensing Board (OCILB), Ohio Department of Commerce
Ohio has no license called 'master HVAC'; its top person-held HVAC credential is the statewide HVAC Contractor license (with a separate Refrigeration Contractor license for refrigeration work) issued by the Ohio Construction Industry Licensing Board (OCILB) to an individual who qualified by examination (R.C. 4740.01(A)), who then assigns it to a contracting company. Other states' reciprocity forms pair this license with their master HVAC or mechanical contractor licenses, so it is treated here as the master level. A new applicant must be 18, a citizen or legal alien, have five years as a tradesperson in the trade immediately before applying (or be an Ohio registered engineer with three years of construction business experience), pass BCI and FBI background checks, pass both sections of the PSI-administered examination (trade and Business & Law), carry $500,000 of contractor liability insurance in one company name, and pay a $25 application fee and $25 license fee per trade; licenses expire annually and renew with 8 hours of continuing education (24 for three-year renewals). OCILB's published reciprocity list covers HVAC licenses from Alabama, Kentucky, Louisiana, Mississippi, South Carolina, Tennessee and West Virginia (refrigeration from Alabama, Kentucky, Louisiana, Mississippi and Tennessee), with the Ohio Business and Law exam still required for Louisiana, Mississippi, South Carolina and Tennessee licensees. Federal EPA Section 608 certification is required of anyone handling refrigerants but is not part of the OCILB application.
Why Louisiana has nothing to transfer
Louisiana master HVAC technician
Licensed by cities and counties
Louisiana does not issue a statewide master HVAC or master mechanic license. The state-level credential for HVAC work is the Louisiana State Licensing Board for Contractors (LSLBC) commercial license in the Mechanical classification (major classification 6, or subclassification 6.1 Heat, Air Conditioning, Ventilation, Duct Work and Refrigeration), mandatory for any mechanical project of $10,000 or more; it is a contractor license issued to the business (or a sole proprietor) and qualified by a natural person, the qualifying party, who passed the trade exam through PSI, so it is treated here as a business license rather than a person-held master credential. Master mechanic licenses exist only at the local level: New Orleans issues a Class 'A' Master Mechanical Contractor License ($110 per year) to an applicant who passed the ICC G29 Master Mechanical exam directly or through LSLBC state testing, carries $500,000 of general liability insurance, and is the only Class 'A' holder for the company; Jefferson Parish issues a $200 parish trade contractor license built on the state license. For the state contractor license the LSLBC waives the trade exam for any applicant who passed a comparable classification exam in any other state without waivers, exemptions or grandfathering, with no partner-state list since October 23, 2024, but the Business and Law course/exam, the financial statement and the other licensing requirements are never waived. No parish or city page reviewed publishes reciprocity for out-of-state master licenses. Federal EPA Section 608 certification applies to anyone who handles refrigerants.
How local licensing works in Louisiana
State contractor license (not a master license). Under La. R.S. 37:2150.1(16) a mechanical contractor is anyone contracting for air conditioning, refrigeration, heating, plumbing, ventilation, boiler or piping work of $10,000 or more, and the LSLBC issues the commercial license to that person or business with a Mechanical classification (or the 6.1 Heat, Air Conditioning, Ventilation, Duct Work and Refrigeration subclassification) qualified by a designated qualifying party. Applicants file the online application with a financial statement (required of all applicants), Secretary of State registration for any business entity including out-of-state companies, the online Business and Law course/exam, and the PSI trade exam for the classification (PSI has administered all LSLBC trade exams since August 5, 2025); statutory fee caps are $50 per examination, $100 license and $100 renewal, plus a surcharge of up to $400 that the board may assess on a contractor not domiciled in Louisiana. Reciprocity for the state license: R.S. 37:2153(F)(5) directs the board to waive the trade portion of the exam for an applicant licensed in a comparable classification in another state on written certification that the applicant passed that classification's exam and is in good standing, and the Executive Director's October 23, 2024 letter extends this to any state: a classification exam passed in any other state 'with no waivers, exemptions, or grandfathering in effect' is accepted for the equivalent Louisiana classification, and all previous state-to-state agreements were declared null and void. The applicant has the origin board complete the Reciprocity Request form (license status, disciplinary history, and the name, exam developer, date and score of each person who passed the trade exam) and uploads it with the application; the exam/administrative fee is still charged, and the business law requirement 'shall not be waived'. Once licensed, R.S. 37:2156.1(I) exempts the contractor and its employees from any parish or city examination or certification.
New Orleans. The Class 'A' Master Mechanical Contractor License covers air conditioning and refrigeration (and, separately, gasfitters): the applicant submits a passing ICC Official Results Report for exam G29 Master Mechanical, obtained from ICC directly or through state testing with the LSLBC, plus certificates of general liability insurance of at least $500,000 and workers' compensation naming the City as certificate holder, a photo and ID; the license costs $110 per year active or $25 inactive, with a $10 per month delinquent fee, renews from 90 days before the holder's birthday, and only one Class 'A' holder is allowed per company. The city page states no experience requirement and no reciprocity.
Jefferson Parish. A parish trade contractor license ($200 new) is issued to a license holder/qualifying party for mechanical work and lists the state license, occupational license, sales tax registration, liability insurance and workers' compensation on its checklist; air conditioning and heating equipment may be installed or replaced only under a filing by a parish-licensed mechanical contractor.
Shreveport. Requires city contractor registration for anyone performing HVAC work and the state license for work over $10,000; master testing is referred to the ICC or the LSLBC.
Baton Rouge and Lafayette. No official page describing a master mechanic license was located for East Baton Rouge Parish or Lafayette Consolidated Government.
Out-of-state holders. A master HVAC contractor from another state who wants to contract in Louisiana applies for the LSLBC commercial license with the Mechanical classification and, if the origin license was earned by a trade exam, requests the trade-exam waiver by reciprocity; the Business and Law course and financial statement are still required. City licenses such as New Orleans Class 'A' can then be obtained on the ICC G29 exam or LSLBC testing.
Common questions
- Do I have to take the Ohio master HVAC technician exam if I'm licensed in Louisiana?
- The trade exam is waived, but Ohio requires a law or code exam.
- What does it cost to get a Ohio master HVAC technician license from Louisiana?
- Published fees on this path total $25, not counting exam vendor fees or bonds.
- Does it work the other way, from Ohio to Louisiana?
- Not necessarily. Reciprocity is directed. Going from Ohio to Louisiana, the mechanism is not applicable.
Sources
- EPA Section 608 Technician Certification Requirements · 40 CFR Part 82, Subpart F (Clean Air Act §608) · U.S. Environmental Protection Agency · Other · verified September 15, 2026Federal requirement in every state: technicians who maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere must be certified (Type I small appliances, Type II high-pressure, Type III low-pressure, Universal). Apprentices under direct supervision are exempt. Certification does not expire; the core exam must be proctored for Universal certification. State HVAC boards commonly require it before licensure, but it is not itself a state license.
- OCILB - Contractors & Contracting Companies (state license requirements, reciprocity list, document checklists) · Ohio Department of Commerce, Division of Industrial Compliance · Agency Page · verified September 15, 2026Opened through the r.jina.ai text proxy because com.ohio.gov returned 404 to the fetcher. States that OCILB issues state licenses to commercial contractors in five trades: Electrical, HVAC, Hydronics, Plumbing and Refrigeration. Requirements: age 18, citizen or legal alien, five years as a tradesperson in the trade (or Ohio registered engineer with three years of construction business experience), no disqualifying offense, pass the trade examination, $500,000 contractor liability coverage, fees; BCI and FBI background checks after board approval and before the exam. Fees: $25 application per trade, $25 licensing fee per trade, $60 annual escrow renewal. 'Reciprocity with other states' section: Ohio offers reciprocity only to applicants who passed the state-recognized test; Tennessee accepts Ohio grandfathered licensees; where noted the Business and Law (B&L) exam is required. List: Alabama - HVAC and Refrigeration; Arkansas - Plumbing; Kentucky - Electrical, HVAC, Refrigeration; Louisiana - Electrical, HVAC, Refrigeration - B&L; Mississippi - Electrical, HVAC, Refrigeration, Plumbing - B&L; North Carolina - Electrical; South Carolina - Electrical, HVAC, Plumbing - B&L; Tennessee - Electrical, HVAC, Refrigeration, Plumbing, Hydronics - B&L; West Virginia - Electrical, HVAC, Plumbing; Virginia - Electrical; Texas - Electrical. Reciprocity applicant checklist: notarized reciprocity application, OCILB verification form signed by the other state's board, $25 application fee per trade. The page says nothing about a journeyman, technician or individual HVAC license and nothing about EPA Section 608.
- OCILB Examination Application (PDF) · Ohio Construction Industry Licensing Board · Form · verified September 15, 2026Standard route: last five consecutive years of tax documents plus one of: a permit for each of the last five years obtained by the licensed contractor employer, an active journeyman's card in the trade, an apprenticeship completion certificate (Ohio- or US DOL-approved), or 40 hours of live/virtual code continuing education from an OCILB training agency; or an Ohio registered professional engineer with three years of business experience; or five years as an Ohio government inspector in the trade. $25 application fee; exam types Hydronics, Electrical, HVAC, Plumbing, Refrigeration.
- OCILB - Testing Application (form DIC 3524) · Ohio Department of Commerce, Division of Industrial Compliance · Agency Page · verified September 15, 2026Opened through the r.jina.ai text proxy. Lists the trades licensed (Electrical, HVAC, Refrigeration, Plumbing, Hydronics) and links the Testing Application PDF (DIC 3524); last reviewed March 2020.
- OCILB - Reciprocity Application - Louisiana (EL, HV, RE) · Ohio Department of Commerce, Division of Industrial Compliance · Agency Page · verified September 15, 2026Opened through the r.jina.ai text proxy. Eligibility: a current Louisiana unlimited electrical license or Louisiana unlimited mechanical license (HVAC or refrigeration) issued after passing the Louisiana licensing exam.
- OCILB Louisiana Reciprocity Application (PDF) · Ohio Construction Industry Licensing Board · Form · verified September 15, 2026Types: EL, HVAC, RE, HY. Applicant must currently hold a Louisiana Unlimited Electrical or Mechanical License obtained by testing with Louisiana; licenses obtained by grandfathering or reciprocity must apply to take the Ohio exam and the Ohio Business and Law exam. Separate application and fee per trade; Reciprocity Verification of Licensure under state seal.
- Ohio Revised Code 4740.01 - Construction industry licensing board definitions · R.C. 4740.01(A), (C), (E) · Ohio Legislative Service Commission · Statute · verified September 15, 2026'License' means a license the board issues to an individual as a heating, ventilating, and air conditioning contractor, refrigeration contractor, electrical contractor, plumbing contractor, or hydronics contractor. 'Tradesperson' means an individual employed by a contractor who performs the work without assuming responsibility for the means, method or manner of the work; tradespersons are not licensed under the chapter. 'Contracting company' is a company in the construction industry working on construction projects. Effective September 17, 2014.
- Ohio Revised Code 4740.06 - License application; qualifications for examination · R.C. 4740.06(B), (C), (F), (H) · Ohio Legislative Service Commission · Statute · verified September 15, 2026(B) age 18, citizen or legal alien, five years as a tradesperson in the trade (or registered engineer with three years' business experience), contractor's liability insurance. (C) alternative qualification for holders of a substantially similar out-of-state license: at least five building authorizations and a tax return showing income under that license. (F) the specialty section authorizes the license within 90 days of the application once the applicant qualifies and passes the exam. (H) renewal without re-examination with continuing education. Effective September 30, 2025 (H.B. 96, 136th General Assembly).
- Ohio Revised Code 4740.08 - Reciprocity · R.C. 4740.08 · Ohio Legislative Service Commission · Statute · verified September 15, 2026When a written reciprocity agreement between the states exists, an individual licensed in the other state who submits a copy of the agreement and pays the licensure fee is licensed without examination if the specialty section finds the other state's requirements substantially equal and that it extends similar reciprocity to Ohio licensees; the section may withdraw authorization for good cause before issuance. Effective December 29, 2023.
Verified dates are when a person last opened each source and confirmed the facts above. Cite the board, not us.