Almost every guide says a Kentucky master HVAC contractor needs four years and 8,000 hours. The statute says two years, and the regulation defines a year as 1,500 hours. A verified walkthrough of all three master routes under KRS 198B.658, the 1,500-hour rule, the exam breakdown, real fees, the $500,000/$300,000 insurance minimums, and the local-jurisdiction exemption nobody publishes.
If you searched for the Kentucky HVAC experience requirement, you have almost certainly been told it is four years and 8,000 hours.
It is not. The statute says two years, and the regulation defines a year of HVAC experience as 1,500 hours. Two years is 3,000 hours. The commonly published figure is off by more than five thousand hours, and it has been repeated across the licensing-guide sites long enough that it now reads as fact.
Kentucky licenses HVAC statewide through the Department of Housing, Buildings and Construction, Division of HVAC, in Frankfort. The framework sits in KRS 198B.650 to 198B.689 and 815 KAR 8:010. This guide works from that text, verified against the Legislative Research Commission and the Division of HVAC in August 2026.
The two licenses, and what each one lets you do
Kentucky issues two HVAC licenses plus an apprentice registration.
Master HVAC contractor. The license that lets a business advertise and practice HVAC contracting in the Commonwealth. Under 815 KAR 8:010 Section 1(1)(a), the master HVAC contractor supervises and is primarily responsible for all HVAC work performed by the employees and subcontractors of the licensee or of the company the licensee represents.
Journeyman HVAC mechanic. The working license. Per the Division's exam description, it permits the holder to install any system of air conditioning, warm-air heating, and ventilation, including equipment start-up and any duct system needed to complete an air-conditioning system, while employed under the supervision of a master HVAC contractor.
Apprentice HVAC mechanic. Under KRS 198B.658(4)(a), the department issues an apprentice certificate to any person who registers as an apprentice. Under 198B.658(4)(e), apprentices and pre-apprentices pay no fee to obtain or renew a certificate of registration. Registration is not optional bookkeeping; it is how the department credits your hours toward the journeyman requirement.
The scope of "HVAC contracting" in Kentucky is broader than a lot of people expect. The Division defines the practice as the installation, maintenance, altering, remodeling, or repair of heating systems, ventilation systems, hydronic systems, burner service, or cooling systems. Hydronics and burner service are inside the license here, which is not true in every state.
Journeyman: two years, and what counts as a year
Under KRS 198B.658(2)(c), a journeyman HVAC mechanic applicant must either:
- Have been regularly and principally employed or engaged in HVAC trades for not less than two years under the direction and supervision of a master HVAC contractor; or
- Have been regularly and principally employed or engaged in performing HVAC work for not less than two years in Kentucky or in another jurisdiction, as demonstrated by verifiable documentation.
The second route is the one that matters for people relocating. Kentucky does not require your out-of-state experience to have been under a Kentucky master. It requires verifiable documentation of two years of HVAC work, wherever you did it.
And here is the number nobody publishes. 815 KAR 8:010 Section 5(2): "One (1) year of HVAC experience shall consist minimally of 1,500 hours of HVAC work in a continuous twelve (12) month period."
Fifteen hundred hours. Not two thousand. Kentucky sets the floor below a nominal full-time year, which means a legitimately busy but seasonal HVAC year can still count as a full year. It also means the two-year requirement translates to roughly 3,000 qualifying hours, not the 8,000 the aggregators report.
Two substitutions can shorten the path further:
Coursework. KRS 198B.658(5): satisfactory completion of one academic year of a department-approved curriculum, or one year of professional training in HVAC work, may be counted as equivalent to one year of employment toward the journeyman requirement, not to exceed one year.
Teaching. KRS 198B.658(6): one academic year of teaching in a department-approved or state-approved technical education program in HVAC shall be counted as equivalent to one year of employment. Note the difference in verb. The coursework substitution is discretionary ("may be considered"); the teaching substitution is mandatory ("shall be considered"). Teaching credit applies to both the journeyman and master requirements, capped at one year.
There is also a narrow third credit at KRS 198B.658(3): experience obtained while exempt from licensure under certain subsections of KRS 198B.674 may be counted as equivalent to one year, capped at one year, if the department determines it is equivalent.
Master HVAC contractor: three doors, all two years
Under KRS 198B.658(1)(c), a master HVAC contractor applicant qualifies one of three ways. All three are two-year requirements.
Door one. Regularly and principally employed or engaged in HVAC trades as a journeyman HVAC mechanic for not less than two years under the direction and supervision of a master HVAC contractor.
Door two. Regularly and principally employed or engaged in the practice of HVAC contracting as a master HVAC contractor, or the equivalent, for not less than two years, in Kentucky or in another jurisdiction, as demonstrated by verifiable documentation.
Door three. Regularly and principally licensed and employed as a mechanical engineer for not less than two years, in Kentucky or another jurisdiction, as demonstrated by verifiable documentation.
Door two is the quiet one. A master HVAC contractor who has held that role for two years anywhere in the country, or held "the equivalent thereof" in a state that does not use the master title, qualifies for the Kentucky master license on experience without first sitting in a Kentucky journeyman seat. Door three does the same for licensed mechanical engineers.
Applicants must also be at least 18 and be a U.S. citizen or a resident alien authorized to work in the United States (KRS 198B.658(1)(a) and (b)).
Proof of experience, and the W-2 at the top of the list
815 KAR 8:010 Section 5(1)(a) lists exactly what the department accepts as proof of experience, in order:
- A W-2 form
- An affidavit by the master HVAC contractor who directed and supervised the applicant
- A copy of a current master HVAC contractor license, journeyman HVAC mechanic license, or equivalent held in another state, if that state requires licensure
- Verifiable documentation of the nature and extent of HVAC contracting work performed in a state that does not require licensure
- Department of Defense form DD 214
Item one on Kentucky's proof list is a W-2. That is a small detail with a long tail, and it lines up with how the Commonwealth writes the rest of this chapter, which we get to below.
Under Section 5(1)(b), the department may request additional proof before or after licensing if it has reason to believe the experience shown is insufficient or nonexistent. A license issued on thin documentation is not a closed matter.
The exams
815 KAR 8:010 Section 4(1) provides that HVAC examinations are developed, administered, and scored by the department or its designee. In practice the department has contracted the HVAC examination program to Prov, Inc.
Master HVAC exam: 100 questions, four hours, open book. Subject weighting per the Prov candidate information bulletin: General Knowledge 14, Systems & Sizing 13, Equipment 7, Piping 5, Refrigeration Systems 7, Electrical 6, Maintenance 6, Plan Reading/Estimating/Math 19, and Law and Administration 23.
Look at that last line. Nearly a quarter of the master exam is law and administration, KRS Chapter 198B and 815 KAR Chapter 8, plus another 19 questions on plan reading, estimating, and math. Forty-two of a hundred questions on the master exam are not about equipment. It is a business-and-code exam wearing an HVAC jacket, which is consistent with what the license actually authorizes: running the work, not performing it.
Journeyman HVAC exam: 60 questions, three hours, open book, offered in English or Spanish. Weighting: General Knowledge 14, Maintenance 10, Refrigeration Systems 9, Systems & Sizing 6, Equipment 6, Piping 6, Electrical 6, Plan Reading/Estimating/Math 3.
Passing score: 70 percent (815 KAR 8:010 Section 4(4), and the Prov cut-score).
A passing score is valid for three years (Section 4(7)).
Two provisions worth knowing:
The master exam counts twice. Under Section 4(3)(b), a journeyman applicant may apply a passed master HVAC contractor examination toward the journeyman exam requirement, and may use that same master score to satisfy the master requirement, as long as the score is still inside its three-year validity window. One sitting, both boxes.
Equivalent exams can be recognized. Under Section 4(8), on application by a testing agency, a national code group, or an applicant, the department shall recognize another examination as equivalent if the submitter demonstrates it covers the same material at the same level of knowledge.
Unlike Kentucky's plumbing exams, which the Division of Plumbing administers itself on a four-times-a-year calendar, HVAC exams are computer-based and scheduled through Prov, with testing centers around the Commonwealth and a remote proctored option. There is no waiting period between attempts; you may retake a failed exam as often as necessary.
Exam fees are charged by whoever administers the exam. 815 KAR 8:010 Section 4(5)(a)2 sets department examination fees at $150 for a master HVAC contractor and $50 for a journeyman HVAC mechanic, while Prov's published Kentucky HVAC candidate bulletin lists its computer-based exams at $80 each. Confirm the current figure with Prov or the Division of HVAC before you register, since you pay the administering body.
Fees and renewal, verified
From 815 KAR 8:010, current as of August 2026. Fees are set by the department and change; verify before paying.
Initial license application (Section 2(1)): $250 for a master HVAC contractor for a twelve-month license. $50 for a journeyman HVAC mechanic. Initial fees may be prorated for not less than seven months and not more than eighteen months.
Annual renewal (Section 7(1)(b)): $250 for a master, $50 for a journeyman, payable to the Kentucky State Treasurer. Renewal also requires Form DHBC L-1, proof of annual continuing education under 815 KAR 2:010, and, for a master, proof of insurance under KRS 198B.668.
Every license expires on the last day of the licensee's birth month and must be renewed each year (Section 7(2)). A license not timely renewed expires immediately.
Late renewal: a renewal notice filed late but not more than 60 days after expiration is accepted, with a restoration fee added.
Reinstatement: a licensee whose license terminated under KRS 198B.664(3) may reinstate within three years of termination by meeting the renewal requirements and paying a reinstatement fee. Past three years, you start over as a new applicant.
Applications go stale. Under Section 2(2), an initial application remains pending until all requirements are met, up to one year from submission, then it is voided. Under Section 4(5)(c), if you do not complete a department-provided exam within one year of the first notice of examination, the application is void.
Both applications require a passport-sized color photograph taken within the past six months (Section 2(1)(f)).
The forms are HVAC 1 (master contractor application), HVAC 2 (journeyman application), HVAC 4 (examination registration), and DHBC L-1 (renewal).
Insurance: $500,000 and $300,000, plus a local-jurisdiction shield
KRS 198B.668(1) requires that no person, firm, or corporation practice HVAC contracting unless it maintains general liability insurance of not less than $500,000 and property damage insurance of not less than $300,000, underwritten by a carrier licensed and approved by the Kentucky Department of Insurance.
Three consequences:
Proof goes in first. Under 198B.668(2), proof of insurance is submitted to the department prior to issuance or renewal of a license.
No insurance, no valid license, and carriers report. Under 198B.668(4), no license is valid without the required insurance, and insurance carriers must notify the department upon cancellation of a licensee's coverage.
It shields you from duplicate local requirements. This is the provision worth knowing if you work across multiple Kentucky cities. KRS 198B.668(3): proof of the state-required insurance exempts licensees from obtaining separate insurance in local jurisdictions under any local licensing laws. You satisfy the state requirement once and a city cannot make you buy a second policy to work there.
Two related notes: under 815 KAR 8:010 Section 2(1)(b), when the master HVAC contractor applicant is an employee representing a company, the company may provide the insurance certificates. And under Section 6(2), a master in inactive status is not required to maintain KRS 198B.668 insurance, but under Section 6(5), performing HVAC work on an inactive license is grounds for revocation or suspension of every HVAC license and certification the person holds.
A certified HVAC inspector may hold a master or journeyman license but must place it in inactive status while the inspector certification is active (Section 6(4)).
EPA 608 is federal, and it is not a Kentucky license
Any technician who handles refrigerants needs EPA Section 608 certification under federal law. That is separate from, and additional to, your Kentucky HVAC license. Passing 608 does not license you in Kentucky, and holding a Kentucky journeyman license does not satisfy 608. We break the two apart in EPA 608 certification vs. an HVAC license.
The structural rule that decides whether your company can pull permits
Kentucky does not license HVAC companies. It licenses HVAC people, and it attaches the company to a person.
Read 815 KAR 8:010 Section 1(1)(b): if a licensee is an employee of a company and the licensee's license represents the company, then if the licensee ceases to represent the company, or the company's name changes, the licensee must notify the department in writing and request a change of information.
Then read what the statute does when that person is gone. Under KRS 198B.667(1), if the master HVAC contractor who procured HVAC permits for a company dies, the department grants an interim period of up to 180 continuous calendar days for the company to keep using that license, but only if the company effectuates and documents all necessary bonding and insurance and keeps those policies in effect for the entire interim period. Under 815 KAR 8:010 Section 1(1)(c), the company must notify the department within ten days of the death, and must notify the department when it has a replacement master on or before the expiration of the interim period.
At the end, KRS 198B.667(3):
"Upon termination of the deceased master heating, ventilation, and air conditioning contractor's license, a company shall have an employee with a current and valid Kentucky master heating, ventilation, and air conditioning contractor's license in order to procure permits and perform heating, ventilation, and air conditioning work governed by KRS 198B.650 to 198B.689."
An employee. In the statute. And Kentucky writes the same sentence twice, the plumbing chapter carries an identical construction at KRS 318.054(5)(c). Two separate chapters, two separate boards, one drafting choice.
That is the whole operating question for an HVAC business in Kentucky. Not whether the company is licensed, it cannot be. Whether it employs the person who is.
We analyze both statutes side by side, and what they mean for staffing a Kentucky HVAC or plumbing business, in the Kentucky qualifier guide. For the national picture on the same question, see does a contractor license qualifier have to be an owner or an employee and our HVAC contractor qualifying agent guide.
If you need a Kentucky master HVAC contractor in an employment seat, entering the state, replacing a retiring master, or covering the 180-day clock, that placement is what we do, and we do it as a full-time W-2 employee of your company, which is the only structure KRS 198B.667(3) supports. Start at Hire a Qualifying Agent. If you hold the license and want to understand the other side, see becoming a qualifying agent and what a qualifying agent is. For the wider Kentucky picture, see the Kentucky state guide and how to get an electrician license in Kentucky.
Frequently asked questions
How many years of experience do you need for a Kentucky master HVAC license?
Two. KRS 198B.658(1)(c) sets a two-year requirement under all three qualifying routes: two years as a journeyman under a master, two years as a master or the equivalent in any jurisdiction, or two years licensed and employed as a mechanical engineer. The widely published "four years and 8,000 hours" figure does not appear in the Kentucky statute or regulation. 815 KAR 8:010 Section 5(2) defines one year of HVAC experience as a minimum of 1,500 hours in a continuous twelve-month period, which puts the two-year requirement near 3,000 hours.
How much does a Kentucky HVAC license cost?
Under 815 KAR 8:010 as of August 2026: a journeyman pays a $50 initial license fee and $50 a year to renew; a master pays $250 initially and $250 a year to renew. Exam fees are charged by the administering body, the regulation sets department exam fees at $150 master and $50 journeyman, while Prov's published Kentucky bulletin lists its computer-based exams at $80. An active master must also carry the $500,000 general liability and $300,000 property damage coverage required by KRS 198B.668, and that premium depends on payroll, work mix, and loss history. All of these are set by the department, the legislature, or the testing vendor and change, verify before paying.
What does it cost to bring in a licensed master HVAC contractor for my company?
There is no published rate, and any single number you find will be wrong for most situations. It turns on the scope of work being qualified, the risk the master is taking on, how many jurisdictions and trades are involved, whether it is a single-state need or part of a multi-state expansion, and how fast the seat has to be filled. Because Kentucky requires the licensed master to be an employee, this is a compensation structure rather than a fee. We scope it case by case, see Consultation Packages.
Does Kentucky require the master HVAC contractor to be an employee of the company?
Yes, and the statute says so directly. KRS 198B.667(3) provides that a company "shall have an employee with a current and valid Kentucky master heating, ventilation, and air conditioning contractor's license in order to procure permits and perform" HVAC work. 815 KAR 8:010 Section 1(1)(b) further contemplates a licensee who is "an employee of a company" and whose license "represents the company."
How long can a Kentucky HVAC company operate after its master contractor dies?
Up to 180 continuous calendar days, under KRS 198B.667(1), conditioned on the company documenting all required bonding and insurance and keeping it in force for the whole period. The company must notify the department within 10 days of the death and must have a replacement master on or before the interim period expires. The deceased licensee's license is terminated by the department at the end of that window.
Can I use my out-of-state HVAC experience in Kentucky?
Yes. KRS 198B.658(1)(c)2 lets two years of practice as a master HVAC contractor "or equivalent thereof" in another jurisdiction qualify you for the Kentucky master license, and 198B.658(2)(c)2 does the same for two years of journeyman-level work. Both require verifiable documentation. 815 KAR 8:010 Section 5(1)(a) tells you what the department accepts, including a copy of an out-of-state license, or documentation of work performed in a state that does not license the trade.
Does a Kentucky HVAC license cover hydronics and boilers?
The Division defines the practice of HVAC contracting to include heating systems, ventilation systems, hydronic systems, burner service, and cooling systems. Hydronic systems and burner service are inside the license. Boiler and pressure vessel work is separately regulated by its own division within the Department of Housing, Buildings and Construction, so confirm scope with the department before taking on boiler work.
Fees, exam content, passing scores, insurance minimums, and statutory requirements described here are set by the Kentucky Department of Housing, Buildings and Construction, the Kentucky General Assembly, and the testing vendor, and are subject to change. Verified against KRS 198B.658, KRS 198B.667, KRS 198B.668, and 815 KAR 8:010 via the Legislative Research Commission, and against the Division of HVAC and Prov, Inc. candidate materials, in August 2026. Confirm current requirements with the Division of HVAC before filing.
Disclaimer: This article is provided for educational and informational purposes only. It does not constitute legal advice, licensing guidance, or an offer of services. Licensing requirements vary by jurisdiction. For specific compliance questions, contact The Licensing Company for a confidential consultation.