HVAC Companies in Georgia

Short answer: Exchange lists 21 HVAC contractors in Georgia. Conditioned air work is licensed by the state, and the licence has two classes with a hard capacity line between them: Class I is capped at 175,000 BTU per hour of heating and five tons of cooling, Class II is unlimited. Georgia's design problem is latent load, not sensible load — a humid subtropical climate where an oversized unit satisfies the thermostat, short-cycles, and leaves the building damp.

HVAC contractors in Georgia

Georgia sits almost entirely in ASHRAE climate zone 3A, with the northern mountain counties reaching into 4A. That means a long cooling season, a mild but real heating season, and — the fact that governs everything else — high outdoor dew points for months at a time. The state's mechanical contractors are not primarily fighting temperature. They are fighting moisture, and the equipment decisions that follow from that are different from the ones a contractor makes in Texas or Arizona.

This directory lists conditioned air and mechanical firms working across Georgia: residential replacement and service companies across metro Atlanta, commercial and light industrial mechanical contractors on the distribution and manufacturing corridors along I-75 and I-85, coastal firms in Savannah and Brunswick dealing with salt-air corrosion, and design-build mechanical firms working on the data centre and film studio construction that has reshaped the state's commercial market.

Licensing: Class I and Class II conditioned air

Georgia licenses conditioned air contractors through the Division of Conditioned Air Contractors under the State Construction Industry Licensing Board. There are two classes and the boundary between them is a capacity limit, not a dollar limit. A Class I licence permits work on systems up to 175,000 BTU per hour of heating input and up to five tons — 60,000 BTU per hour — of cooling. A Class II licence carries no capacity limit. In practice Class I covers residential and light commercial replacement; anything rooftop, anything with a chiller, and most restaurant and retail work needs Class II.

Qualification requires documented experience, a passing examination score, and the licence is held by a qualifying agent who must be genuinely associated with the business — the board treats licence renting as a disciplinary matter. Contractors also carry federal EPA Section 608 technician certification for refrigerant handling, which is a separate credential from the state licence and applies to the technician rather than the firm. Local business licensing and permit registration sit on top of the state licence in most jurisdictions, and Atlanta, Fulton County, Gwinnett and Cobb each run their own permit process.

The latent load problem

The single most consequential technical fact about HVAC in Georgia is that a correctly sized system runs longer than an oversized one, and running longer is how the system dehumidifies. An oversized air conditioner reaches setpoint quickly, shuts off, and never runs long enough to pull moisture out of the air across the coil. The occupant feels cold and clammy, turns the thermostat down, and the humidity gets worse. This is why a Manual J load calculation, a Manual S equipment selection and a Manual D duct design are not paperwork in this state — they are the difference between a system that works and one that grows mould.

The related failure is duct location. A very large share of Georgia's residential stock has supply ductwork in a vented attic that reaches 130 degrees in July. Leakage from that duct system pulls humid attic air into the return side and pushes conditioned air into the attic, and the resulting negative pressure in the house draws outdoor moisture through the envelope. Duct leakage testing under the Georgia Energy Code is the mechanism that has forced this into the open on new construction; on retrofit work it is the first thing worth measuring.

Inward vapour drive and the brick veneer question

Georgia is one of the states where inward vapour drive is a genuine assembly risk rather than a textbook one. A sun-heated brick or masonry veneer that has absorbed rain drives water vapour inwards toward an air-conditioned, and therefore cool and low-pressure, interior. If the wall assembly has a vapour-impermeable layer on the inside face — vinyl wall covering being the classic offender in hotel and healthcare work — the moisture condenses inside the wall. The mechanical contractor is implicated because building pressurisation is a mechanical decision: a building held slightly positive with dehumidified outdoor air does not draw humid air through its walls, and one held negative does.

Codes and energy

Georgia adopts its own amendments to the International Energy Conservation Code through the Department of Community Affairs, and the state amendments are substantive rather than cosmetic — duct leakage limits, envelope air leakage testing and equipment efficiency minimums all sit in the Georgia supplements. The 2023 federal minimum efficiency standards for the southeast region also bind here: the region has a higher minimum SEER2 for split system air conditioners than the north, and the rule is enforced at installation rather than at manufacture, which means a contractor cannot lawfully install non-compliant equipment even if it can be bought.

Liens and payment

Georgia mechanic's lien practice is unforgiving on timing. A lien must be filed within 90 days of the last labour or materials furnished, and a Notice of Commencement filed by the owner triggers a 30-day Notice to Contractor requirement for anyone not in direct contract with the owner. Miss that notice and the lien rights are gone before the 90 days ever runs. After filing, a Notice of Action must be filed within 365 days or the lien becomes unenforceable. Subcontracted mechanical firms working under a general contractor on commercial projects should be tracking the Notice of Commencement filings on every job rather than relying on the general contractor to pass them along.

Coastal and mountain edge cases

Two sub-markets behave differently from metro Atlanta. On the coast at Savannah, Brunswick and St. Simons, salt aerosol attacks condenser coils and cabinet fasteners; coastal-rated coil coatings and stainless hardware are a specification item rather than an upsell, and a standard unit sited within a few hundred metres of open water will lose years of service life. In the north Georgia mountains, the heating season is long enough that a single-stage heat pump sized for the cooling load runs out of capacity on design-day mornings, which is why dual-fuel systems with a gas or propane backup and a properly set changeover point are common above the fall line and largely absent below it.

Nearby regions and related trades

HVAC contractors in other regions: Arizona, California, Florida, Illinois, Maryland, North Carolina, Ontario, Pennsylvania, South Carolina, Texas, Virginia.

Other trades in Georgia: General Contracting, Mechanical, Roofing & Waterproofing.

Jump to licence verification sources for HVAC in Georgia, or back to all hvac contractors on Exchange.