Pen-and-ink Arizona scene: a flat-roofed stucco building with rooftop air conditioning units and a ladder on one side, tall saguaros and a service truck on the other, mesas behind.

Arizona HVAC license classes

which Arizona
HVAC license
do you need?

Every ROC class, what it lets you do and what it means for coverage.

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the short answer

Arizona licenses HVAC through the Registrar of Contractors, and the dividing line is refrigeration: C‑39 includes it, C‑58 doesn’t, and C‑79 is C‑39 plus solar. Each has a residential and a dual counterpart, and the older R‑39R subclass codes are no longer issued.

every Arizona HVAC class.

Scope in plain words. The ROC table is the authority, this is the map.

C‑39: Commercial air conditioning and refrigeration. Refrigeration and evaporative cooling, wet, dry or radiant heating, and ventilation with its duct work, filters and controls.
C‑58: Commercial comfort heating, ventilating and evaporative cooling. Warm air heating, gas furnaces, space heaters, ventilation and evaporative coolers, plus testing and balancing. No refrigeration.
C‑79: The C‑39 scope including solar, plus testing and balancing of refrigerant, cooling, heating and air handling systems.
R‑39: Residential air conditioning and refrigeration, with or without solar: comfort cooling, evaporative cooling, ventilating and heating. It takes in every R‑39R subclass.
R‑39R: Residential air conditioning and refrigeration without solar. The residential half of the CR‑39 dual license.
CR‑39: Dual. The C‑39 and R‑39R scopes on one license.
CR‑58: Dual. The C‑58 scope and the residential warm air heating, evaporative cooling and ventilating scope.
CR‑79: Dual. The C‑79 and R‑39 scopes, both including solar, on one license.
Legacy R‑39R: Gas refrigeration, temperature controls, warm air heating, evaporative cooling and pre‑cooler subclasses. No longer issued. Existing licenses stay on the record, and the work sits inside R‑39.

Sources: Arizona Registrar of Contractors, license classifications. Last reviewed September 2026.

tap a license type.

See what each kind of class covers and what underwriters ask about it.

What it covers

commercial.

C‑39, C‑58 and C‑79. Commercial air conditioning, heating and refrigeration work.

Who asks: Underwriters, about rooftop units, contract requirements and finished work.

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what’s different about
Arizona HVAC licenses.

Refrigeration splits it.
C‑39 and C‑79 include refrigeration. C‑58 doesn’t. That decides whether refrigerant handling and recovery gear belong in your coverage review.
Ducts ride with the class.
Duct work that’s part of the system sits inside C‑39 and C‑58. Sheet metal as its own line of business is a separate class, C‑45.

good to know.

Straight answers on Arizona HVAC license classes.

What HVAC license do I need in Arizona?

Arizona licenses heating and cooling through the Registrar of Contractors. C-39 covers commercial refrigeration, evaporative cooling, heating and ventilation. C-58 covers heating, ventilation and evaporative cooling without refrigeration, and C-79 adds solar. Residential work sits under R-39, and the CR dual licenses combine both. The ROC decides which class fits your work.

What is the difference between C-39 and C-58?

Refrigeration. C-39 lets you install and repair refrigeration and evaporative cooling along with heating and ventilation. C-58 covers warm air heating, gas furnaces, ventilation and evaporative coolers, with the duct work and controls that go with them, but not refrigeration. A shop that sets condensers and charges systems sits on the C-39 side.

Why does my license show an R-39R code?

The ROC no longer issues new licenses in the old R-39R subclasses, like gas refrigeration, temperature controls and evaporative cooling. Licenses issued under those codes stay on the record, so an older license can still show one. The ROC says the R-39 scope includes every R-39R subclass, so we map the old code to the current scope.

Sources: Arizona Registrar of Contractors, license classifications. Last reviewed September 2026.

Insurance words, in plain English: waiver of subrogation · certificate of insurance · additional insured · primary and noncontributory · hold harmless agreement · contractual liability · completed operations · blanket endorsement