Why It Matters
Why South Florida Homes Need HVAC Mold Treatment
Mold inside an HVAC system is one of the most serious — and most hidden — indoor air quality problems a home can have. Your air conditioner pulls air through ducts, coils, and an air handler continuously. When mold colonizes any of those surfaces, every cooling cycle distributes spores throughout every room in your home.
South Florida's year-round heat and extreme humidity create near-ideal conditions for mold growth inside HVAC components. The evaporator coil is almost always wet from condensation. The air handler and drain pan hold moisture. South Florida homes have some of the highest rates of HVAC mold contamination in the country — and most homeowners have no idea it's there until they notice a persistent musty odor or unexplained allergy symptoms.
US DuctMaster uses EPA-registered antimicrobial treatments applied directly to coils, air handler interiors, duct surfaces, and drain systems — eliminating existing mold and leaving a residual barrier that inhibits regrowth. Every job starts with a free inspection — zero obligation to proceed.
EPA
Registered antimicrobial treatments used on every job
Annual
Recommended treatment interval for South Florida's climate
$0
Cost for your full mold inspection & estimate
5.0★
Google rating — verified customers
What's Included
Everything Covered in Every Mold Treatment Job
Every mold treatment covers the complete HVAC system — coils, air handler, drain system, and duct interiors. No partial jobs, no upsells, no surprises.
Full HVAC Mold Inspection
Before any treatment, our technician performs a thorough inspection of all HVAC components where mold is commonly found — evaporator coil, air handler interior, drain pan, supply and return ducts, and registers. We document and show you exactly what we find.
Included in every job
Evaporator Coil Treatment
The evaporator coil — the most common site of HVAC mold in South Florida — is treated with EPA-registered antimicrobial solution applied directly to all coil surfaces. The treatment eliminates existing mold and leaves a residual barrier that inhibits regrowth.
Included in every job
Air Handler & Plenum Treatment
The interior of the air handler cabinet and supply plenum — surfaces that every cubic foot of conditioned air passes through — are treated with antimicrobial solution. Frequently overlooked in standard maintenance but critical in humid climates.
Included in every job
Drain Pan Treatment
The condensate drain pan — one of the highest-risk mold sites in any HVAC system — is treated with antimicrobial solution and the drain line is inspected for blockage. A clean drain system is essential for preventing moisture buildup that feeds mold growth.
Included in every job
Duct Interior Treatment
Supply and return duct interiors are treated with antimicrobial fogging where mold is present or suspected. Duct mold frequently goes undetected for years while continuously distributing spores through the home.
Included in every job
Written Report & EPA Record
Before any work begins you receive a written estimate. After the job, a service report records what was found, what was treated, and the EPA-registered products applied — your full documented record of treatment.
Included in every job
Our Process
How HVAC Mold Treatment Works
01
Free Inspection & Mold Assessment
Our technician inspects every HVAC component where mold is commonly found — evaporator coil, air handler cabinet, supply and return plenum, drain pan, drain line, duct interiors, and registers — at no charge. We document visible mold and show you what we find before providing a written estimate.
02
Pre-Treatment Cleaning
Where significant mold or debris buildup is present on coil surfaces, air handler interiors, or drain pans, we perform pre-treatment cleaning to remove physical contamination. Applying treatment over heavy buildup reduces effectiveness — this step ensures full surface contact with the antimicrobial agent.
03
EPA-Registered Antimicrobial Application
EPA-registered antimicrobial solution is applied directly to all identified treatment surfaces — evaporator coil, air handler interior, supply plenum, and drain pan. The solution is selected for HVAC use specifically: safe for coil metals and duct materials, effective against South Florida mold species, and leaves a residual barrier.
04
Duct Fogging (Where Indicated)
Where mold is present or suspected in duct interiors — particularly flex duct, duct board, or older metal duct — antimicrobial fogging is applied through supply and return registers to treat duct surfaces throughout the system.
05
Drain Line Check & Service Report
The condensate drain line is checked for blockage and cleared if needed. The system is returned to operation and a full service report is provided documenting all findings, treatment areas, and products applied.
Customer Reviews
What Our Customers Say
"
★★★★★
Had a musty smell in the house for over a year — tried everything. US DuctMaster found heavy mold on the evaporator coil. After treatment the smell was gone within days.
Patricia L.
South Florida
"
★★★★★
My daughter's allergies were terrible all year. US DuctMaster found mold throughout the air handler and treated the whole system. Her symptoms improved noticeably within two weeks.
Robert A.
South Florida
"
★★★★★
Free inspection was eye-opening — they showed me the mold on the coil with a light before any work started. Professional, thorough, used EPA-registered products. House smells completely different now.
Monica V.
South Florida
South Florida Coverage
Mold Treatment — All 66 Cities We Serve
Click any city to see the dedicated page for your area.
All 66 Service Cities
3 Counties · 66 Cities
FAQ
Frequently Asked Questions
How often should South Florida homes get HVAC mold treatment?
Annually — South Florida's climate makes this one of the most important annual maintenance items for any home. Year-round AC use combined with high ambient humidity creates near-constant condensation on evaporator coil surfaces. Even after effective treatment, mold can reestablish within 12–18 months without annual retreatment.
What are the warning signs of mold in my HVAC system?
A persistent musty or earthy odor when the AC runs — especially noticeable when the system first turns on — is the most common sign. Other indicators include unexplained allergy symptoms or respiratory irritation that worsen indoors, visible dark spots around supply registers or on the air handler cabinet, and a smell that comes specifically from the vents.
What does the free HVAC mold inspection include?
Our technician inspects all primary mold sites — evaporator coil, air handler cabinet interior, supply plenum, drain pan, drain line, duct interiors, and supply and return registers. We document visible mold growth and show you what we find. You receive a written estimate covering all recommended treatment areas, with zero obligation to proceed.
What does EPA-registered mean and why does it matter?
EPA-registered antimicrobial products have been reviewed and approved by the U.S. Environmental Protection Agency as effective against specific microbial organisms including the mold species common to HVAC systems. We exclusively use EPA-registered products formulated specifically for HVAC use — not consumer products repurposed for the task.
Can HVAC mold affect my family's health?
Yes. Mold spores distributed through an HVAC system are inhaled continuously whenever the system runs. Common effects include respiratory irritation, worsening of asthma and allergy symptoms, headaches, and fatigue. In South Florida, where AC systems run year-round, the exposure is constant. Many families notice symptom improvement within days to weeks of HVAC mold treatment.
Eliminate Mold From Your HVAC. Book Your Free Inspection Today.
No obligation, no service call fee, same-day available across all of South Florida.
