The North Carolina HVAC License: Which Heating Group You Need

North Carolina has no license called an HVAC license. The work is licensed by the State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors under one of three heating groups, and which group applies is decided by the system — chiefly by whether its refrigeration capacity exceeds fifteen tons. Installing, testing or offering to do the work for payment requires a license.

One sentence inside the group-two definition overrides the capacity test for the systems it describes: a group-two system installed in a single-family residence is group three regardless of size.

What triggers the requirement

The licensing trigger is G.S. 87-21(a)(5), and it is written around activities rather than job value:

(5) Any person, firm or corporation, who for a valuable consideration, (i) verifies, inspects, evaluates, tests, installs, alters or restores, or offers to verify, inspect, evaluate, test, install, alter or restore, either plumbing, heating group number one, or heating group number two, or heating group number three

Three things follow directly. There is no dollar threshold — unlike general contracting, which starts at $40,000, this requirement attaches to the activity itself. Inspecting, testing and evaluating are licensed activities, not only installing. And offering to do the work is covered, so quoting for it without a license is within the prohibition.

The three heating groups

Group one is the wet side — steam, vapor or hot water. G.S. 87-21(a)(2) defines it as the heating system “which requires the use of high or low pressure steam, vapor or hot water, including all piping, ducts, and mechanical equipment appurtenant thereto, within, adjacent to or connected with a building, for comfort heating.”

Group two is the large forced-air side. G.S. 87-21(a)(3) defines it as “an integral system for heating or cooling a building consisting of an assemblage of interacting components producing conditioned air to raise or lower the temperature, and having a mechanical refrigeration capacity in excess of fifteen tons, and which circulates air.”

Group three is the same kind of system at or below that capacity — “a direct heating or cooling system of a building that raises or lowers the temperature of the space within the building for the purpose of comfort in which electric heating elements or products of combustion exchange heat either directly with the building supply air or indirectly through a heat exchanger using an air distribution system of ducts and having a mechanical refrigeration capacity of 15 tons or less” (G.S. 87-21(a)(4)).

The single-family rule, and the limit of it

G.S. 87-21(a)(3) carries this sentence: “Systems installed in single-family residences are included under heating group number three, regardless of size.”

Where that sentence sits decides how far it reaches. It is inside (a)(3) — the definition of group two — so it speaks to the systems that subsection describes: a forced-air heating or cooling system that would otherwise be group two by capacity is group three when installed in a single-family residence. Capacity stops being the test for those.

It does not follow that every system in a house is group three. Group one is defined separately, at (a)(2), by the use of steam, vapor or hot water, and no capacity figure appears in it at all. Whether a particular hydronic system in a single-family residence falls under group one or group three is a question of how the subsections are read together, and this page does not resolve it. Read (a)(2), (a)(3) and (a)(4) side by side before relying on either answer.

Where a group-three system can still need a plumbing license

One configuration splits across two licenses, and G.S. 87-21(a)(4) spells it out. A heating system “requiring air distribution ducts and supplied by ground water or utilizing a coil supplied by water from a domestic hot water heater not exceeding 150 degrees Fahrenheit” requires:

• “either plumbing or heating group number one license to extend piping from valved connections in the domestic hot water system to the heating coil”, and
• “either heating group number one or heating group number three license for installation of coil, duct work, controls, drains and related appurtenances”.

Two trades, one system. What a plumbing license covers on its own is at what a plumbing license covers.

Starting an HVAC business

The license attaches to “any person, firm or corporation” carrying on the activity (G.S. 87-21(a)(5)), so the business entity and the license are separate decisions that have to agree with each other. Trading as a company does not remove the licensing requirement, and holding a license personally does not by itself put a business behind it.

A federal requirement is not a state license. Anything required under federal law for handling refrigerants is a separate matter, is not issued by this Board, and does not satisfy G.S. 87-21. This page covers the state license only.

What it costs, and how long it takes

The statute states fees as ceilings rather than charges. Under G.S. 87-22, persons, firms or corporations “engaged in the business of either plumbing or heating contracting, or both, shall pay an annual license fee not to exceed one hundred fifty dollars ($150.00).”

That is a maximum the Board may not exceed, not the amount payable — read the current fee from the Board itself. The one flat date in that section is renewal: licenses “expire on the last day of December in each year following their issuance or renewal” (G.S. 87-22), so the cycle is a calendar one no matter when you were licensed.

How long the process takes is not set by statute, and no timeline appears in G.S. 87-21 or 87-22. Any figure you see quoted for it comes from somewhere other than the law, and this page does not offer one.

Checking someone else’s

Whether a contractor holds the right group for your system is a public record — see checking an HVAC contractor’s license. Working without the license the activity requires is covered at working without a license.

Whether a general contractor license is needed as well, on a larger project, is a different statute and a different board — see when a general contractor license is required and how this board sits against a contractor license. The board that issues every classification on this page is at the board that issues it. For the licensing system as a whole, start at the main licensing guide.