Whole-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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Aventura
We seal ductwork in Aventura’s high-rise condos, townhomes, and oceanfront towers where shared vertical chases and COA rules make the job different from a standard suburban house call. Our crews dispatch from our Miami office and carry the low-noise, compact equipment needed to work inside Aventura’s compact mechanical closets and navigate building quiet-hour windows. Call us at (361) 326-5060 for a free written estimate before any work starts.
We’ve worked in buildings along the Intracoastal, near Aventura Mall, and throughout the condo corridors of eastern Aventura. That local experience matters because sealing ducts here isn’t just about finding leaks. It’s about knowing which section of a stacked run belongs to the unit owner, which belongs to the association, and how to schedule the repair without violating COA work-hour restrictions.
Why Hollis Air Duct Cleaning Is Aventura’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. We operate under The Garrison Standard: written prices, written guarantees, and a 365-Day Done Right Promise that covers every repair in writing. If our seal fails within a year, we come back and make it right at no charge, including a free second visit.
Our technicians are background-checked and uniformed. You know who’s arriving before they walk in. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
We price every Aventura job in writing before touching equipment. The figure does not move at the door. This matters especially in Aventura, where COA access fees and off-hours scheduling can become surprise add-ons with less disciplined outfits. We itemize those costs upfront.
Our equipment roster includes Rotobrush rotary brush systems, Nikro negative-air machines, and sealing products from Abatement Technologies and Guardsman. These are the same tools commercial crews use in South Florida’s largest buildings, sized down for residential mechanical closets.
Air Duct Sealing in Aventura
Air Duct Sealing in Aventura typically addresses leaks in the supply and return runs that connect your unit to the building’s central air handler, plus the branch ducts inside your walls or ceiling. Most Aventura homeowners notice they need sealing when one room stays humid while others cool normally, or when their electric bill climbs despite unchanged thermostat settings. In this market, a typical residential duct sealing job runs $450 – $1,200 depending on accessibility, linear feet of duct, and whether the work must happen during COA-mandated quiet hours.
Shared Chase Sealing
In Aventura’s high-rises, your supply duct often shares a vertical chase with five, ten, or twenty other units. A seal failure at a joint in that chase leaks conditioned air into the wall cavity or into a neighbor’s line. We seal from both the unit side and the chase access point when the COA grants entry, using mastic and mesh tape rated for Florida humidity.
Plenum Collar Restoration
The plenum collar, where your flex duct meets the air handler or main trunk, is a common failure point in Aventura’s older buildings. Salt humidity degrades the sealant and corrodes mechanical fasteners. We remove degraded material, clean the mating surfaces, and re-seal with fiberglass-reinforced mastic designed for coastal environments.
Duct Sealing Services in Aventura
Duct Sealing Services in Aventura cover the full range of leak repair, from spot-sealing individual joints to restoring entire branch runs in buildings where original ductwork dates to the 1970s or 1980s. We also handle the coordination with building management that many Aventura properties require. Our standard process includes pre-seal airflow testing, leak identification with smoke pencils or pressure diagnostics, mechanical repair of damaged sections, and post-seal verification. Pricing for comprehensive sealing in Aventura’s condo market typically falls between $650 and $1,800 for multi-branch systems with chase access requirements.
COA Coordination and Scheduling
Most Aventura buildings restrict noisy or intrusive work to weekday mid-mornings or early afternoons. We contact your property manager directly, provide certificate of insurance documentation, and schedule within your building’s approved window. Our Nikro negative-air machines run quieter than standard equipment, reducing the chance of resident complaints.
Antimicrobial Treatment Integration
Aventura’s year-round humidity means mold colonies often colonize the same damp joints where air leaks. Where we find biological growth during sealing prep, we apply EPA-registered antimicrobial treatment after source removal. This is standard on our oceanfront jobs, where salt corrosion and mold pressure coincide.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Aventura
We carry sealing and repair materials from Abatement Technologies and Guardsman, plus rotary cleaning equipment from Rotobrush and Nikro negative-air systems. These are not hardware-store brands. Abatement Technologies manufactures the containment and filtration products used in hospital and commercial remediation nationwide. Guardsman produces the foil tapes, mastics, and sealants specified by many South Florida mechanical engineers for coastal duct applications. We stock these materials on our Aventura vans so we’re not waiting on a parts run while your building’s quiet window closes. For filtration upgrades tied to sealing work, we also source Honeywell and Aprilaire products.
Common Duct Sealing Problems We See in Aventura Homes
- Salt-corroded foil tape failure. Cheap foil tape applied by prior contractors dries and curls within a single Aventura summer. The adhesive degrades from salt air exposure, and the tape lifts from duct joints, recreating the leak we were called to fix. We remove this temporary material and replace it with mastic and mesh rated for continuous humidity.
- Liner flaking in shared chases. In oceanfront towers, the foil-facing liner on duct interiors delaminates from years of salt humidity exposure. Flaked liner blocks airflow at bends and registers, and the debris circulates into living spaces. Our source removal process extracts this material under negative pressure before we re-seal the joint.
- Misassigned dryer vent responsibility. Dryer vents passing through common walls or ceilings in Aventura condos are frequently omitted from both owner and association maintenance schedules. The vent path corrodes, lint accumulates, and fire risk rises. We document the vent route and advise whether sealing or replacement falls under your unit, the association, or both.
- Degraded plenum collars in compact closets. Aventura’s older condos have mechanical closets barely wider than the air handler itself. Limited access means prior repairs were rushed, and the collar sealant was never properly applied. We disassemble what we must, seal correctly, and verify with airflow measurement before closing the closet.
Pricing for Duct Sealing in Aventura, FL
Most duct sealing work in Aventura runs $450 – $1,200 for standard residential units with accessible branch ducts. Jobs requiring chase access, COA coordination, or multi-unit coordination in shared systems range $650 – $1,800. Factors that move the price: linear feet of duct, number of joints requiring re-sealing, whether we must work within restricted hours, and whether liner restoration or antimicrobial treatment is needed.
We do not quote per-vent teaser prices that balloon at the door. We inspect your system, identify every leak, and write the full price before work begins. That written price is fixed. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Aventura
Our Miami-based crews also provide Duct Sealing in Jacksonville, Miami, Tampa, and Orlando. Each location operates independently under The Garrison Standard with the same written pricing and 365-Day Done Right Promise. If you’re searching for Duct Sealing in Aventura specifically, our local dispatch gets vans to your building within the scheduling window we commit to.
Serving Aventura, FL - Our Local Coverage Area
We’re based in the Aventura 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 Duct Sealing in Aventura
Responsibility depends on where the leak sits. The unit owner typically owns the duct from the air handler to the register grille inside their walls. The association usually owns the main trunk and shared chase serving multiple units. We inspect, document the leak location, and provide a written report you can submit to your property manager if chase-side access is needed. Call (361) 326-5060 and we’ll sort out which side of the wall needs attention.
Salt-laden humidity corrodes mechanical fasteners and duct liner faster than inland climates, and shared vertical chases mean one unit’s leak pressurizes a neighbor’s space or wastes conditioned air into common walls. Sealing is not a one-time fix here. It’s ongoing maintenance against an environment that actively degrades duct materials. We use coastal-rated mastics and schedule follow-up inspections in buildings with chronic salt exposure.
Yes. We coordinate directly with your COA or property manager, provide insurance certificates, and schedule within your building’s approved quiet windows. Our equipment includes low-decibel negative-air machines that reduce resident complaints. We’ve worked in Aventura buildings that restrict mechanical work to Tuesday and Thursday mornings, and we adapt to those constraints without adding rush fees.
We pressurize the system and use smoke pencils or theatrical fog at accessible joints, combined with static pressure measurement at the air handler. In shared chases, we also inspect from the nearest access panel the COA provides. This tells us whether the leak is on your branch, the main trunk, or a neighbor’s connection point. We show you the pressure readings before and after sealing.
Not always. Dryer vents that pass through common structure are frequently omitted from both owner and association maintenance schedules, creating a gap where lint accumulates and corrosion goes unaddressed. We trace the full vent path, document who owns each section, and seal or replace only the portions we’re authorized to touch. If your vent needs association-side work, our written report supports your request to the board. Call (361) 326-5060 for an inspection.
Ready to stop losing cooled air into your building’s walls? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free written estimate on duct sealing in Aventura. We’ll inspect your system, identify every leak, and give you a fixed price before any work starts. Every repair is covered by our 365-Day Done Right Promise.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Aventura since 2004.