Who licenses HVAC work in Oklahoma
Oklahoma licenses HVAC work at the state level through the Construction Industries Board, whose office is at 2401 NW 23rd Street, Suite 2F in Oklahoma City. The trade side is handled by the Committee of Mechanical Examiners. The governing law is the Mechanical Licensing Act at Title 59 of the Oklahoma Statutes, Section 1850.1 and following, and the rules that fill in the detail are codified at Title 158, Chapter 50 of the Oklahoma Administrative Code. Section 1850.7 of the Act is the sentence that matters most to a working contractor. No person may engage in, or offer to engage in by advertisement or otherwise, any mechanical work as a journeyman or contractor without a valid and appropriate license from the Construction Industries Board, and no business entity may act as a mechanical firm unless a licensed contractor is associated with it and responsible for all of its mechanical work. There is no Oklahoma general contractor license sitting above that. The Construction Industries Board states that general contractors are not currently required to hold a state license for general contracting, while trade licenses and registrations are required for performing or offering to perform licensed trade work, and that local jurisdictions should be contacted for local requirements. For an HVAC firm in Oklahoma the mechanical contractor license is the license that lets the company sell and perform the work.
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The mechanical license categories that cover HVAC and refrigeration
The Construction Industries Board does not issue one generic HVAC license. It issues categories, and the category decides what you may legally install and service. An HVAC/R Unlimited Contractor license covers any cooling product, system or equipment including the process piping, heating equipment including the process piping, and sheet metal, natural gas piping and refrigeration, with no capacity ceiling. An HVAC/R Limited Contractor license covers the same scope of work but caps cooling at no more than 25 tons and heating at no more than 500,000 Btu/h of heat input per appliance. A Refrigeration Contractor license covers refrigeration products, systems and equipment including the process piping. A Natural Gas Piping Contractor license covers natural gas piping from the point of delivery to the appliance connections. A Process Piping Contractor license covers all process piping, and a Sheet Metal Contractor license covers all ferrous and nonferrous duct and exhaust systems. A Ground Source Piping Contractor license covers buried or submerged piping used with a heat pump, requires proof of certification in ground source piping installation from an organization approved by the Committee, and requires no examination. Journeyman versions of the HVAC/R Unlimited and Limited categories exist with matching scopes. Pick the category that matches the equipment you actually sell, because the license text, not the job title, controls the scope.
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Journeyman, contractor, and what your firm has to carry
Oklahoma stacks three credentials in the mechanical trade. A registered apprentice works under direct on the job supervision. A journeyman holds a category license and works for an active licensed mechanical contractor. The contractor license is described by the Construction Industries Board as the highest ranking mechanical license, and every mechanical contractor must be a permanent employee, owner, partner or officer in the mechanical firm. That rule is what stops a company from renting a license number from someone who never shows up. Section 1850.7 backs it up by requiring that a contractor be associated with the firm and responsible for all mechanical work the entity performs. The normal path is apprentice, then journeyman, then contractor. Contractor applicants must meet the same requirements as a journeyman plus one additional year of experience in the mechanical trade. Apprentices are capped by ratio: mechanical apprentices to contractors run three to one, and an apprentice must work in a ratio of no more than three apprentices directly supervised by a journeyman or contractor. Apprentice applications must carry original signatures and must be signed by an active contractor. For a growing Oklahoma HVAC company that ratio is a real hiring constraint, because crews cannot scale on apprentices alone without adding licensed journeymen to supervise them.
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Experience and education routes to a mechanical license
Journeyman applicants must be at least 18 years old and must document experience. The base route under OAC 158:50-9-1 is three years of verifiable experience in the mechanical trade in the category applied for. Approved schooling shortens that. An associate degree or vocational diploma from a Committee approved program of 1,000 hours or more cuts the requirement to one year of verifiable experience. A 500 hour approved program leaves two years. A 375 hour program leaves two and one quarter years. A 334 hour program leaves two and one third years. A 250 hour program leaves two and one half years. Equivalent verifiable experience earned in the United States military also counts, and so does experience sufficient to obtain a special certification such as Ground Source Piping or Medical Gas. A current out of state license in the same mechanical classification, in good standing and meeting the same qualifications, can also satisfy the experience test. Verifiable experience means mechanical experience obtained while employed by a licensed mechanical contractor or by other means approved by the Committee, and one year of verifiable experience equals 2,000 hours. Contractor applicants add one more year on top of whichever journeyman route they used. Keep payroll records and dated supervisor sign offs, because the Committee reviews the proof before it clears you to test.
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Apprentice registration, and why unregistered hours vanish
This is the rule that costs Oklahoma technicians years. The Construction Industries Board will not count experience obtained inside or outside Oklahoma for any period in which the person was an unregistered apprentice, except for experience lawfully obtained under applicable federal or state law. If you worked two years on Oklahoma rooftops without an apprentice registration card on file, those hours do not exist when you apply to sit for the journeyman exam. Registration is cheap compared with the loss. The rule schedule sets the apprentice application fee at $5.00 and the apprentice registration fee at $20.00. Under Section 1850.9 of the Mechanical Licensing Act the Board registers an apprentice who is 16 years of age or older and who is either enrolled in a recognized school or training course for mechanical apprentices or has arranged employment as a mechanical apprentice with a licensed mechanical contractor. Apprentice registration certificates expire one year after the date of registration, at which point the apprentice reregisters and pays the renewal fee to receive a renewal certificate. The application must be signed by an active contractor and must carry original signatures. Owners of Oklahoma HVAC firms should treat apprentice registration as an onboarding step on day one, the same as a drug screen or a driver record check, because it protects the future licensing of every helper on the payroll.
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The PSI examinations for Oklahoma HVACR licenses
The Construction Industries Board contracts examinations to PSI Services LLC, which delivers them at computer testing centers in Oklahoma and elsewhere. The candidate bulletin published by the Board sets the registration fee at $92 for each examination portion, and states that the fee applies whether you are testing for the first time or repeating. Passing scores sit at 70 percent. The HVACR Contractor Unlimited examination runs 90 questions in 240 minutes with 63 correct needed. HVACR Contractor Limited runs 80 questions in 210 minutes with 56 correct needed. HVACR Journeyman Unlimited runs 70 questions in 180 minutes with 49 correct needed. HVACR Journeyman Limited runs 60 questions in 180 minutes with 42 correct needed. Limited Residential Journeyman for mechanical runs 40 questions with 28 correct needed. Contractor candidates also sit the Mechanical Business and Law portion, 50 questions in 120 minutes with 35 correct needed, covering bidding and estimating, project management, payroll taxes and licensing requirements including required insurance, bonds and renewal. Section 1850.6 of the Act requires the Committee to conduct examinations quarterly and at other times as needed. Fail once and you wait 30 days to retest. From the second failure onward the wait is 90 days. Application and license fees must reach the Administrator no less than three working days before the examination date.
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The 2024 code adoption and the current exam transition window
Oklahoma mechanical work is built to codes adopted by the Oklahoma Uniform Building Code Commission, and the Construction Industries Board tests to those codes. The Commission adopted the 2018 edition of the International Mechanical Code with an effective date of September 14, 2021, superseding the 2015 edition. That edition is now being replaced. The Construction Industries Board announced that the Commission adopted the 2024 editions of the International Building Code, International Fuel Gas Code, International Mechanical Code, International Plumbing Code and International Residential Code, with amendments effective September 14, 2026. The Board is running a 90 day transition period for licensing tests. For examinations updated on September 14, 2026, the transition runs from September 14, 2026 through December 14, 2026, and during that window applicants may test against either the previous codes or the newly adopted codes. Beginning December 15, 2026 those examinations are based exclusively on the new codes. The affected list includes OK HVACR Contractor Limited, OK HVACR Contractor Unlimited, OK HVACR Journeyman Limited, OK HVACR Journeyman Unlimited, OK Sheet Metal Contractor, OK Sheet Metal Journeyman, OK Natural Gas Contractor, OK Natural Gas Journeyman, OK Process Piping Contractor, OK Refrigeration Contractor, OK Refrigeration Journeyman, OK Limited Residential Installer and OK Limited Residential Journeyman Mechanical. If you have staff queued to test, book them inside the window and buy the code book they will actually be tested on.
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What the Oklahoma license actually costs
The fee schedule lives in OAC 158:50-9-2 and is repeated on the Board application form. A mechanical contractor pays a $30.00 application fee plus a $300.00 initial license fee, a total of $330.00 sent with the application. A mechanical journeyman pays a $25.00 application fee plus a $50.00 initial license fee, a total of $75.00. The Limited Residential Journeyman license is also $75.00. Apprentices pay a $5.00 application fee and a $20.00 registration fee. Examination registration is separate and is paid to the testing vendor at $92.00 for each examination portion, so a contractor candidate taking a trade portion and the business and law portion pays that amount twice. Money must be payable to the Construction Industries Board, and application, examination and initial license fees must be received no less than three working days before the examination date. If an applicant fails to meet the minimum qualifications to take the examination, the application fee is forfeited. Reciprocity applicants pay the same application and initial license fees, and those are not refundable under any circumstances. A one time low income fee waiver exists under OAC 158:1-3-13(c). Budget the bond premium and the general liability policy separately, because a passed exam does not produce an active license by itself.
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Bond and general liability insurance for an active contractor
Passing the examination does not put an Oklahoma mechanical contractor into business. The license stays inactive until the Construction Industries Board receives proof of two things. First, a $5,000.00 corporate surety bond payable to the Oklahoma Construction Industries Board, with original signatures, seals and power of attorney attached. The bond must be in the individual license holder's name, must be continuous, and must provide 30 days notice of cancellation. Second, a certificate of insurance evidencing a minimum of $50,000.00 in commercial general liability coverage, in the form of a certificate of general liability. The individual license holder's name must appear on the certificate and the certificate holder must be the Construction Industries Board. The Board puts the burden of watching the renewal date on the contractor. Failure to keep current insurance causes the license to become inactive, and the Board states that it is a violation to contract for services without current insurance and an active license. Whenever a policy is renewed or replaced, the contractor must send name, license number and proof of insurance to the Board by email, mail, fax or the contact form. These are state minimums, not commercial minimums. General contractors, property managers and most commercial owners in Oklahoma will ask for far higher limits and for additional insured status before they let your crew on site.
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Renewal on your birth month, late fees, and continuing education
Oklahoma mechanical licenses run on the licensee's birthday. Section 1850.8 and OAC 158:50-9-3 both say a license may be issued for no longer than one year and expires on the last day of the birth month of the licensee each year. Renewal is by application with the renewal fee delivered or mailed on or before that date. The renewal fee is $200.00 for a contractor and $75.00 for a journeyman. Late fees hit after 30 days from expiration. The Board renewal form states that contractor renewal and late fee together total $300.00 and that journeyman renewal and late fee together total $100.00, matching the rule schedule of a $100.00 contractor late fee and a $25.00 journeyman late fee. A contractor may elect inactive status by paying the annual renewal fee, which drops the bond and insurance requirement at the same fee amount. No late fee applies to a license that expired during military service if application is made within one year of discharge, and no license renews while fines owed to any division of the Board remain unpaid. No contractor or journeyman license renews unless the licensee completed at least six hours of continuing education in the 36 months preceding expiration, with course and instructor approved in advance by the Committee of Mechanical Examiners. A credit hour means at least 50 minutes of instruction with a 10 minute break. Approved formats include six hours in one day, two three hour sessions within seven days, a single two hour session, or an approved correspondence course. A licensee is exempt for three years from the date of passing the current licensing exam, and hours approved by another state agency still need Board committee approval.
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Reciprocity and exam equivalency for out of state HVAC contractors
Oklahoma does not hand out mechanical licenses to any out of state holder who asks. Under OAC 158:50-9-6 an applicant must first confirm that a written reciprocity agreement exists between the applicant's state and Oklahoma for the license sought, then submit an application to the Board on its form. The Committee reviews it and recommends approval or disapproval, and the Board makes the final call. The applicant must show that the other state's licensure requirements are substantially the same or equivalent, judged on trade categories, experience, continuing education, adopted codes and examination content and passing scores. The applicant must have lawfully practiced the trade in that state for the year immediately before applying, must have no disciplinary matters pending in any jurisdiction, and must have obtained the license being reciprocated by examination. Application and initial license fees are due up front and are not refundable. A contractor applicant who qualifies under a written contractor agreement is granted a journeyman license first, and receives the contractor license after passing the Oklahoma Mechanical Contractor Business and Law portion. Where no agreement exists, OAC 158:50-9-4.1 offers exam equivalency: if the Board has already approved the other jurisdiction's exam as substantially similar, a journeyman applicant skips the Oklahoma trade exam and a contractor applicant skips the technical trade section but still sits business and law.
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Advertising, vehicle lettering and display of your license number
This is where Oklahoma HVAC marketing meets the rule book. OAC 158:50-5-4 requires each licensed contractor to display the mechanical firm name and the contractor license number, with the initials OK preceding that number, on all vehicles used to transport materials and tools in the operation of the business. The names and numbers must be printed in letters and numerals at least two inches in height, in a conspicuous location on both sides of each vehicle, in a color that contrasts with the background. The pocket license issued by the Administrator must be on the mechanical person while on the job. Separately, the mechanical contractor state license number must be displayed on all advertising, contracts and bids. The rule defines advertising for this purpose to exclude uniforms and promotional items such as pens, pencils, key chains and tape measures. Read that literally: your website, your yard signs, your direct mail, your truck wraps, your Google Business Profile posts and your written estimates all carry the number, while a branded ball cap does not have to. Section 1850.7 reinforces it by barring anyone from offering to engage in mechanical work by advertisement without the appropriate license. Build the number into your page templates and estimate templates once and it stops being a recurring compliance risk.
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How an Oklahoma customer verifies the license you advertise
The Construction Industries Board runs a public licensee search, and Oklahoma homeowners are pointed to it from the Board's consumer page titled Are They Licensed. That page offers a search covering building and home inspectors, electrical, mechanical and plumbing licensees, plus a separate search for registered roofing contractors. A customer types a name or a license number and sees whether the credential is real and current. Two practical consequences follow for an Oklahoma HVAC company. First, the license number you print on ads and estimates has to resolve to an active record in that database, in the exact name the customer will search. A firm operating under a trade name whose license sits under a different individual's name creates confusion at exactly the wrong moment, which is when a homeowner is comparing three bids. Second, the same lookup is what commercial buyers, property managers and inspectors use before letting a crew start. Keep the record clean by updating insurance verification with the Board every time a policy renews, since a lapse pushes the license to inactive status and an inactive license is what the searcher will see. Show the number, the category and the firm name consistently across the website, the estimate and the truck so that the verification step confirms rather than contradicts what you advertised.
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Penalties for unlicensed mechanical work, and the narrow exemptions
Section 1850.11 of the Mechanical Licensing Act makes a violation a misdemeanor. On conviction the penalty is a fine of not less than $200.00 and not more than $1,000.00, or both fine and imprisonment, together with the costs of prosecution, in addition to suspension or revocation of a license. The Board may also impose an administrative fine of not more than $500.00 for each violation after a hearing, each day in violation may count as a separate violation, and the maximum administrative fine will not exceed $1,000.00. The Mechanical Hearing Board must investigate on written complaint from any person, and may suspend, revoke or refuse to issue or renew a license for a material misstatement on an application, obtaining a license by fraud, loaning or allowing use of a license, demonstrating incompetence, violating the Act or Board rules, or willfully failing to perform normal business obligations without justifiable cause. A person whose license is revoked may reapply one year after revocation. The exemptions are narrow. They cover a property owner doing minor repair, portable self contained ductless air conditioners or heaters, setting or connecting detached air conditioning units with flexible ductwork on a manufactured home, permanent employees of a manufacturing facility working on the premises, boilers and pressure vessels under the Commissioner of Labor, and employees of state owned institutions maintaining state owned facilities.
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Permits, local inspectors, and the Oklahoma City and Tulsa metros
The state license is the floor, not the whole job. Section 1850.14 gives a political subdivision that has adopted a nationally recognized mechanical code and appointed an inspector jurisdiction over interpretation of that code and over the installation of all mechanical work done there, subject to the Oklahoma Inspectors Act. A state inspector may still work directly with a contractor locally if a code violation creates an immediate threat to life or health. Where a political subdivision has not adopted a code and appointed an inspector, the Board has jurisdiction, and no entity may install, modify or alter mechanical systems in such an incorporated area without providing notice of the work to the Board on a form the Board supplies. Minor repair or maintenance performed according to manufacturer instructions does not require that notice. The Board publishes a Notification of Work Without Permit form with its mechanical forms. In Tulsa, the city's residential building permit process states that electrical, mechanical and plumbing permits can be obtained by licensed contractors only, and that mechanical costs are carried on the separate licensed trade permit rather than the building permit. Oklahoma City runs its own contractor registration and permitting through its development services department. Confirm registration and permit rules with each city you work before quoting.
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EPA Section 608 refrigerant certification on top of the state license
The Oklahoma mechanical license does not cover refrigerant handling. That comes from federal law and applies in addition. EPA regulations at 40 CFR Part 82, Subpart F, under Section 608 of the Clean Air Act, require that technicians who maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere be certified. Technicians must pass an EPA approved test administered by an EPA approved certifying organization, and the tests are specific to the type of equipment the technician works on. EPA defines a technician as someone who attaches and detaches hoses and gauges to measure pressure within an appliance, adds refrigerant to or removes refrigerant from an appliance, or performs any other activity that violates the integrity of a motor vehicle air conditioner like appliance or small appliance other than disposal. There are four certification types: Type I for servicing small appliances, Type II for servicing or disposing of high or very high pressure appliances other than small appliances and motor vehicle units, Type III for low pressure appliances, and Universal for all types. Section 608 credentials do not expire, but a core test taken open book cannot be used to earn Universal certification, which requires a proctored core test. Apprentices are exempt while closely and continually supervised by a certified technician. EPA does not issue the cards.
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