Air Duct Cleaning FAQ for Orlando Homeowners

No authoritative Florida-wide survey exists. EPA and NADCA put typical whole-system cleaning at $450–$1,000 per system, and national cost guides report averages of about $389 (HomeAdvisor) to $500 (Fixr). Per-vent pricing is usually $25–$50. These are estimates; see the cost guide and calculator, then compare written quotes.

Cost guides put dryer vent cleaning at about $100–$170 on its own, or about $100 when added to a duct cleaning. Long runs, roof exits and damaged vent pipe can change the price. Vent rerouting or replacement is a different job from cleaning. See the dryer vent cleaning page for details and fire-safety facts.

NADCA says to "avoid advertisements for '$99 whole house specials' and other sales gimmicks," and warns about "blow-and-go" companies that charge a nominal fee, do a poor job, then push extra services. With typical whole-system cleaning at $450–$1,000, a $99 offer rarely covers the whole system. Get the total price and scope in writing before work starts.

It depends on what's in the ducts. EPA suggests considering cleaning for substantial visible mold in hard-surface ducts or on system parts, vermin, or excessive dust and debris that blows out of supply registers. Otherwise, EPA says cleaning is probably unnecessary. Ask any company to show you the contamination before you agree to the job.

Don't count on it. EPA says "duct cleaning has never been shown to actually prevent health problems," and studies don't conclusively show dust levels drop after cleaning. EPA also says not to hire companies that make sweeping health claims. If you or a family member has symptoms, talk to a doctor rather than relying on duct cleaning.

There's no fixed schedule. EPA recommends cleaning only as needed. NADCA doesn't set an interval either; it lists smokers, pets that shed, water damage, allergies or asthma, remodeling and moving into a new home as reasons to clean more often. In Central Florida, also watch for condensation, a musty smell or a dirty coil and drain pan.

Maybe a little, but EPA is cautious. It says some research suggests cleaning dirty cooling coils, fans and heat exchangers can improve efficiency, but "little evidence exists to indicate that simply cleaning the duct system will increase your system's efficiency." In Florida, sealing leaky ducts often matters more; FSEC research found leakage can add 10–20% to cooling and heating costs.

Yes. EPA says "it is normal for the return registers to get dusty" as they pull air in. A light film on a return grille, by itself, isn't a sign the ducts need cleaning. Heavy debris, particles blowing out of supply registers, vermin or visible mold are the conditions EPA names as reasons to consider cleaning.

Not always, and not on its own. EPA says wet or moldy insulated ducts "cannot be effectively cleaned and should be removed and replaced," and mold will recur if the moisture cause isn't corrected. Florida also has a mold law with a 10 sq ft threshold. See mold in AC vents and ducts before hiring anyone.

Florida's mold law (s. 468.8411) defines mold remediation as treatment of more than 10 square feet. Under s. 468.841, a licensed air-conditioning contractor working within its license scope is exempt from the mold license, as long as it doesn't hold itself out as a mold remediator. A mold remediator alone can't do work that needs a contractor license. This is general information, not legal advice.

Orlando's summer dew points average above 70°F, and EPA says condensation or high relative humidity is an important indicator of mold potential in ducts. Spots around a ceiling vent often point to cold supply air meeting humid air, leaky ducts or an air-handler issue. EPA recommends indoor humidity below 60 percent, ideally 30–50 percent.

EPA says UV (UVGI) cleaners can destroy some molds, but "typical UVGI cleaners used in homes have limited effectiveness in killing bacteria and molds," and "dead mold spores can still produce allergic reactions." There's no reliable published installed price, so get a written quote. A UV light doesn't fix a moisture problem, a dirty coil or a clogged drain line.

If water reached the system, have it checked before running it. The Florida Department of Health warns: "If the system was flooded, turning it on without proper cleaning will spread mold throughout your home." Hurricanes Ian (2022) and Milton (2024) each dropped well over 10 inches of rain in parts of the Orlando area. Wet insulated ducts usually need replacement, per EPA.

EPA says research hasn't demonstrated biocides' effectiveness in duct cleaning or their potential health effects, and no chemical biocides are registered for internally insulated ducts. It is illegal to use a pesticide inconsistently with its label. NADCA says antimicrobials belong only after thorough cleaning and only for a specific need. We don't recommend any product; ask to see the label.

Usually yes. Florida Statutes s. 489.105(3) puts "any duct cleaning and equipment sanitizing that requires at least a partial disassembling of the system" in the air-conditioning, mechanical and sheet metal contractor scopes. A DBPR handout says cleaning ducts that requires removing air grills needs a license; changing a filter doesn't. This is general information, not legal advice.

Ask for the company's CAC/CMC license number. Go to MyFloridaLicense.com, choose Verify a License, and search by number or business name. Confirm the status is current, the license type is air-conditioning, mechanical or sheet metal, and the name matches your estimate. A county business tax receipt is not a license. Read our license guide.

Possibly not. In a 2015 declaratory statement (DS 2014-125), Florida's Construction Industry Licensing Board said that because there was no disassembly of the dryer exhaust system using the petitioner's method, a mechanical contractor's license was not necessary. That ruling covered one petitioner's method; rerouting or replacing a vent is different. This is general information, not legal advice.

No. EPA states that it "neither establishes duct cleaning standards nor certifies, endorses, or approves duct cleaning companies," and tells homeowners to be wary of duct cleaners who claim EPA certification. NADCA is an industry association with its own standard and a Find a Professional directory you can check. In Florida, the state license is what to verify.

No. Orlando Air Duct Pros is a referral service, not a contractor, and is not licensed by the Florida Department of Business and Professional Regulation. We connect Orlando-area homeowners with independent local air duct and HVAC companies for free, no-obligation quotes. We don't do the work ourselves, so every quote and agreement is between you and the company.

We usually reply the same day and pass your request to one or more independent local companies that serve your area. They contact you to discuss the job and give a quote. You're free to compare, ask questions and say no. See how it works for the full step-by-step and EPA's hiring checklist.

Requests are welcome from across Orlando, including Lake Nona, and nearby cities such as Kissimmee, St. Cloud, Sanford, Apopka, Ocoee, Winter Garden, Clermont, Altamonte Springs and Winter Park. See the service areas page for local details. If your town isn't listed, send a request anyway and we'll let you know.