HVAC & Air Duct Mold Removal in Atlanta, GA

First decision: keep it running or shut it off?

EPA says not to run an HVAC system if you know or suspect it has mold, because it can spread mold through the house. In an Atlanta summer that is a hard call, so tell the company you contact that the system is off or that you need it running, and ask how soon they can look at it. Meanwhile, note what you are seeing: a musty smell when the air kicks on, dark growth on vent covers, water around the air handler or a stuffy, damp feel indoors.

Where mold forms in a system

EPA recommends keeping drip pans clean, drain lines flowing and indoor humidity below 60 percent.

Duct type changes the job

EPA's duct cleaning guidance says cleaning may be worth considering when there is substantial visible mold inside hard sheet metal ducts. Ducts made of fiberglass duct board or lined inside with fiberglass are different: if they are wet or moldy, EPA says they cannot be effectively cleaned and should be removed and replaced. Ask which kind you have before comparing bids.

What a sound bid includes

• An inspection of the air handler, coil, pan, drain line and the duct runs, with photos
• The moisture cause named and fixed, such as a clogged drain, an oversized unit or leaky ducts in the crawl space
• A clear list of what gets cleaned and what gets replaced
• Any coating or chemical named, with the reason it is needed

Heating and air equipment repair is its own trade credential in Georgia, separate from the general contractor license, so ask who will handle any work on the unit itself. Georgia has no state mold license or certification.

Price ranges

Angi's Atlanta cost guide reports HVAC system mold remediation at $3,522 to $11,740. HomeGuide's 2026 national range for HVAC systems or ducts is $2,000 to $10,000. Angi's 2026 national data puts an HVAC test at $50 to $75 added to an air test. The amount of ductwork, access in tight attics and crawl spaces and how much is replaced drive the cost.