Best HVAC Schools in Indiana (2026)

No, you do not need a state licence to work as an HVAC tech in Indiana, and the reason cities can require one is the opposite of what you might expect. Indiana home rule says a unit does not have power to license a person to practise an occupation if that occupation is subject to licensure under the Indiana Code. A separate provision permits a local licence where the unit determines health and safety standards are appropriate and necessary to protect the public.

Because HVAC appears nowhere in the Indiana Code as a licensed occupation, the prohibition does not bite and the health and safety carve-out applies. Because plumbing is state-licensed, the prohibition does bite, which is why Indianapolis and Allen County only register plumbers rather than licensing them. Indiana forbids local plumbing licensing and permits local HVAC licensing, which is the reverse of most states.

Indiana licenses no electricians at state level either. Plumbing is the only state-licensed building trade, and the professional licensing agency's list of more than forty professions confirms it. So the answer to whether you need a licence in Indiana is entirely a question about which city you work in.

Indianapolis does require EPA certification, and it matches the level to the licence type. Board policy requires Universal certification for the Air Conditioning A licence and for the Refrigeration licence, and both Type I and Type II for the Air Conditioning B and D licences. The High Pressure Steam licence requires no EPA certification at all, which is the one exception.

Enforcement is at the exam stage: if an applicant does not have the appropriate certification type for the licence they are requesting, the board requires them to obtain it before the exam voucher is assigned. So it gates your ability to test, not just your ability to be licensed.

Two things about this are worth knowing. It is board policy rather than ordinance, appearing nowhere in the city code and nowhere in the licence application packet, only in the exam packet. And the board never uses the phrase Section 608, referring only to EPA certification types. Nothing in Indiana state law imposes any refrigerant certification requirement; the federal rule applies regardless.

An Indianapolis licence does not work in Fort Wayne, and the two systems are close to incompatible by design. Allen County's reciprocity rule requires a licence acquired through a national exam from one named provider or another, expressly excluding several others, while Indianapolis accepts a different pair of exam providers. Read literally, Indiana's two largest HVAC licensing jurisdictions will not recognise each other.

The cost difference is roughly twenty-five fold. Indianapolis charges $377 for an individual licence and $247 for a business entity per two-year term, with a $5,000 bond and $500,000 general liability naming the city as additional assured. Allen County charges $90 for the business registration, $25 for a supervisor and $15 for a journeyman annually, and neither its rules nor its code state any bond or insurance requirement.

Scope differs too, in a way that matters. An Allen County class A HVAC licence does not cover hydronics, steam or hot water boilers, duct heaters regardless of BTU, or refrigerant systems capable of maintaining below 60 degrees Fahrenheit including water chillers; all of that goes to a non-sanitary piping licensee. Indianapolis handles the same work through its High Pressure Steam and Refrigeration licence types. Neither city requires continuing education, and Indianapolis licensing does not reach Lawrence, Beech Grove, Speedway or Southport even though they sit inside Marion County.