Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Fast, Reliable Air Duct Cleaning Across Key Biscayne
Air duct cleaning in Key Biscayne typically costs between $450 and $900 for a full system clean of a single-family home, with condo units running $300 to $550 depending on access and the number of returns. The island’s salt-laden ocean air turns ordinary duct dust into a corrosive, mold-feeding problem faster than almost anywhere else in South Florida. We’ve cleaned enough systems here to know what that means for your air handler, your duct seams, and the air your family breathes. If you’re noticing a musty smell when the AC kicks on, or dust building up on vents within days of wiping them, call us at (850) 660-3272 for a written, line-item estimate before any work begins.
Why Hollis Air Duct Miami Is Key Biscayne’s Preferred Air Duct Cleaning Company
Hollis Air Duct Miami has been cleaning ducts across Key Biscayne since 2004, and the island’s specific conditions – salt spray, high humidity, and a lot of concrete-block construction – inform how we approach every job here. Our technicians arrive uniformed and background-checked, and the price is written down before we touch a single vent. No estimates that balloon once the technician is inside. No pressure to add services you don’t need.
The Garrison Standard governs every visit: arrive inside the quoted window, price it in writing, complete the job by the book, and leave the site clean. Our 365-Day Done Right Promise backs that in writing. If the work fails within a year, we return and make it right at no charge, including a free second visit. Roy Castellanos runs our South Florida operation, and he holds every tech to The Garrison Code on every Key Biscayne job – no shortcuts, no fogging upsells, no leaving a mess in a $3 million waterfront condo.
Styles & brands we work with
Air Duct Repair in Key Biscayne
Air Duct Repair in Key Biscayne usually involves sealing separated seams, replacing crushed or corroded duct sections, and repairing return-air chasing that has pulled loose from the air handler. The salt air here accelerates corrosion of galvanized duct seams, especially in condos and homes built between the 1950s and the 1980s. We see it in the Ocean Lane Drive condos and the mid-century homes off Crandon Boulevard: metal ducts that look fine on the outside but have rusted through at the joints, leaking conditioned air into soffits and wall cavities. Duct repair on Key Biscayne typically runs $250 to $600 per access point, depending on what’s failed.
Seam Repair and Reconnection
When a duct seam splits, your system pulls air from wherever it can – crawl spaces, wall voids, even shared chases in condo buildings. That means you’re paying to cool air that never reaches your living room. We locate the separation, seal it with mastic or mechanical fasteners per the duct’s construction, and verify the seal with a pressure test before we leave.
Corroded Section Replacement
On homes where salt air has eaten through the metal itself, patching isn’t enough. We replace the failed section with correctly sized duct, match the insulation, and take before-and-after photos so you can see exactly what was done. The price is agreed before we start cutting.
Ductwork Cleaning in Key Biscayne
Ductwork Cleaning in Key Biscayne means full source removal: negative-air machines pulling a vacuum on the system while rotary brushes and air whips agitate the interior walls, dislodging the sand, salt, and mold spores that accumulate quickly in this climate. A full single-family ductwork cleaning on the island runs $450 to $900. Condos range from $300 to $550. The price is per system, not per vent, and it’s written down before any work starts.
Negative-Air Source Removal
The negative-air method is what commercial crews use, and it’s the only approach that actually removes contaminants rather than blasting them around your home. A Nikro negative-air machine creates continuous suction at the return while our Rotobrush system scrubs each supply duct. What comes out goes into HEPA filtration, not your furniture.
HEPA Filtration and Anti-Corrosion Treatment
In Key Biscayne, we follow the NADCA standard and add an anti-corrosion treatment to cleaned duct surfaces. That’s not an upsell. It’s a direct response to the island’s salt spray, which will otherwise begin corroding freshly cleaned metal within months. We apply it, we explain it, and it’s included in the written price.
Trusted Brands We Service in Key Biscayne
We work on systems built around Rotobrush rotary brush heads, Nikro negative-air machines, and filtration from Honeywell and Guardsman. That matters because your condo association or property manager may have documentation from a previous cleaning that references specific equipment. If they do, we know the machines and we honor the standard. We stock common replacement filters and duct fittings for Key Biscayne jobs so we’re not running back to the mainland mid-job. Less time in your unit, less disruption to your day.
Common Air Duct Cleaning Problems We See in Key Biscayne Homes
- Salt-caked dust inside duct walls. Salt particles from ocean spray bind with household dust and adhere to duct surfaces. Ordinary vacuuming won’t dislodge it; it takes mechanical agitation with the right tools. We see this in nearly every waterfront property on the island.
- Mold growth in return chases on high-rise condos. Shared common-area return chases pull humid, salty air from multiple units. When one unit has a source of moisture, mold can spread through that chase. Sealing off vents during cleaning prevents cross-contamination between units.
- Crushed flex duct in soffit runs. Many Key Biscayne homes built in the 1970s and 1980s used flex duct run through tight soffits. Over decades, that duct gets crushed, kinked, and brittle. Cleaning must account for the condition of the duct itself, not just the dust inside it.
- Pre-sale inspection failures. Condo buildings on Key Biscayne commonly require duct cleaning documentation before a sale or rental turnover closes. We provide camera inspection footage and a written report that satisfies association requirements.
See the difference
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After
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AfterPricing for Air Duct Cleaning in Key Biscayne, FL
Full duct cleaning for a single-family home on Key Biscayne runs $450 to $900. High-rise condo units run $300 to $550. Older concrete-block homes with slab-run ductwork and tight soffit access fall at the higher end of the range because the work takes longer and requires more care to avoid damaging brittle duct seams. Duct repair adds $250 to $600 per access point. Anti-corrosion treatment and HEPA filtration are included in the cleaning price. We don’t charge per vent, and we don’t offer a teaser price that doubles when the van pulls up. Call (850) 660-3272 for a written estimate.
We Also Serve Cities Near Key Biscayne
Our crews serve Key Biscayne directly from our South Florida dispatch office, and we also cover Air Duct Cleaning for clients in Miami Beach, Miami, and Miami Gardens. Wherever you are around Key Biscayne, the same written pricing and 365-Day Done Right Promise apply.
Serving Key Biscayne, FL - Our Local Coverage Area
We’re based in the Key Biscayne area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Air Duct Cleaning in Key Biscayne
Most Key Biscayne homes should have their ducts cleaned every 2 to 3 years, versus every 3 to 5 years for mainland Miami. The island’s salt spray and persistent humidity mean sand, salt, and mold spores accumulate faster inside duct runs. If you live on the water or in a high-rise with shared return chases, every 2 years is the safer interval. Call (850) 660-3272 and we’ll tell you if your system actually needs it or if you can wait.
Many Key Biscayne condo associations do require documented duct cleaning before a resale or rental turnover inspection. The exact requirement varies by building, so check your association’s rules. If it’s required, we provide the documentation your board or property manager will ask for: camera inspection footage and a written report stating the system was cleaned to NADCA standards. Estimates are free.
No. Fogging only treats the surface of the duct at that moment. It does not remove the salt-caked dust, sand, and organic debris that feed mold growth, and it does nothing about the moisture source. In Key Biscayne’s humid, salty air, mold comes back quickly once the fog dissipates. Source removal – physically extracting the debris under negative pressure – is the only method that addresses the problem. We apply anti-corrosion treatment after cleaning as a preventive step, not as a substitute for it.
Older concrete-block homes on Key Biscayne often have ductwork run through slabs or tight soffits, which means access is harder and the ducts themselves are more brittle. Aggressive brushing can break duct seams that have already been weakened by years of salt corrosion. We use appropriate agitation tools for the duct’s condition and construction, and we inspect first so we know what we’re working with. Call (850) 660-3272 for an assessment.
In most cases, yes, if the smell is coming from mold or mildew inside the ductwork. The smell typically comes from microbial growth in the return chase or on the cooling coil, and source removal clears it. If the smell persists after a proper cleaning, the problem is usually a moisture source outside the ducts – a leaking condensation line, a failed pan, or humid air infiltration from a shared chase. We’ll tell you which one it is before you spend more money.
Why the Salt Air on Key Biscayne Changes Everything
Key Biscayne sits surrounded by ocean on three sides, and that changes how ductwork behaves. On the mainland, household dust stays mostly organic: skin cells, pet dander, fabric fibers. On this island, the constant salt spray mixes into everything. That salt binds with dust particles and forms a gritty, corrosive film on duct interiors. It also attracts moisture – salt is hygroscopic, meaning it pulls water from the air – which means even mild humidity inside your return chase becomes a mold incubator. We cleaned the ducts in a mid-century concrete-block home on West McIntyre Street where salt-laden air had corroded the air handler’s blower motor housing and left a fine, gritty residue throughout the supply and return ducts. Using negative pressure and HEPA filtration per NADCA standards, we source-removed a mix of sand, salt, and mold spores, then took camera inspection footage showing the bare metal after cleaning – no fogging upsell needed because the actual source removal addressed the moisture-driven growth. That’s the island’s real problem, and it’s why a mainland cleaning approach doesn’t hold up here.
Written by Roy Castellanos, Owner at Hollis Air Duct Miami, serving Key Biscayne with The Garrison Standard.