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.
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AfterFast, Reliable Duct Sealing Across Bronx
If you’re paying to heat or cool your Bronx home but still feel drafts from your vents, or if one room never matches the thermostat, your ductwork is likely leaking conditioned air into walls, basements, or the spaces between floors. In the Bronx, where pre-war buildings with original galvanized ductwork dominate neighborhoods from Mott Haven to Riverdale, those leaks can waste 20 – 30% of your HVAC system’s output before the air ever reaches your living space. We’ve sealed ducts in Bronx homes since 2004, and our crews know how to work with the borough’s older heating infrastructure without damaging plaster, asbestos-wrapped insulation, or the fragile connections that tie into original boiler systems. Call (361) 326-5060 for a free estimate. Our Duct Sealing in Bronx team dispatches from our New York City office and typically schedules within a few business days.
Why Hollis Air Duct Cleaning Is Bronx’s Preferred Duct Sealing Company
We’ve built our reputation in the Bronx on showing up when we said we would and pricing the job in writing before we touch anything. That matters here more than in most markets, because Bronx homeowners and landlords are often managing tight budgets and stricter compliance requirements than suburban counterparts.
Our technicians are background-checked, uniformed, and trained to The Garrison Code, which means they arrive inside the quoted window, explain what they found, and leave the site clean. Roy Castellanos, who leads Hollis Air Duct Cleaning, insists on this standard because he’s seen what happens when crews treat Bronx apartments like afterthoughts.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to book a technician.
Every duct sealing job carries our 365-Day Done Right Promise in writing. If the seal fails or the leak returns within a year, we come back and make it right at no charge, including a free second visit.
HVAC Duct Sealing in Bronx
HVAC Duct Sealing in Bronx addresses the conditioned air that escapes through gaps, disconnected joints, and deteriorated mastic in your forced-air system’s ductwork. In the borough’s pre-war rental stock, especially buildings with original galvanized or cast-iron ducts hidden behind plaster walls, these leaks often go undetected for years while tenants pay inflated heating bills and landlords field complaints about cold spots. A typical residential duct sealing job in Bronx runs $450 – $1,200 depending on system size and accessibility, with most single-family homes or small multi-family units falling in the $550 – $850 range. We use professional-grade mastic compounds and metal-backed tape rated for the temperature swings these systems see, not the hardware-store foil tape that peels off within a season.
Sealing Behind Plaster and Lathe
Many Bronx buildings have ducts routed through wall cavities with no modern access panels. Our crew locates leaks using calibrated pressure testing, then seals what we can reach through existing registers or small strategic openings rather than tearing out historic plaster.
Boiler System Connections
Some older Bronx homes use hydronic boiler heat with limited forced-air ducting for cooling or ventilation. We seal those transition points carefully, since they’re often the weakest link and the most expensive to access if handled incorrectly.
Duct Repair in Bronx
Duct Repair in Bronx becomes necessary when sealing alone won’t fix crushed, corroded, or illegally modified ductwork. In neighborhoods like Hunts Point and University Heights, we regularly find bathroom vents and dryer exhausts that previous owners or unlicensed handymen routed into air shafts or wall cavities, creating backdraft risks and code violations that require full section replacement rather than patchwork. A typical duct repair in Bronx costs $300 – $950 for section replacement, with extensive re-routing or asbestos-wrapped insulation remediation pushing toward the upper end. We always provide a written price before cutting or removing anything, and we document conditions with photos for landlords who need HPD or HQS inspection records.
Corroded Galvanized Replacement
Original Bronx ductwork from the 1920s – 1950s often rusts from the inside out where condensation collects. We replace failed sections with modern galvanized or fiberglass-lined duct matched to the existing system, then seal all joints with mastic rated for the application.
Code-Compliance Re-Routing
When we find illegal exhaust configurations during a repair, we reroute to exterior termination per NYC building code and provide written documentation of the correction for your records or inspection.
Trusted Brands We Service in Bronx
We seal and repair ductwork connected to equipment from every major manufacturer, and we stock common fittings and sealants for faster turnaround on Bronx jobs. Our equipment roster includes Rotobrush rotary brush systems for pre-sealing cleaning, Nikro negative-air machines for contained dust control during repairs, and filtration products from Honeywell and Guardsman that we can integrate when your duct sealing project reveals inadequate air cleaning upstream. We don’t sell equipment you don’t need, but we do carry the parts to complete most repairs in a single visit rather than ordering and returning.
Common Duct Sealing Problems We See in Bronx Homes
- Failed mastic on original 1940s duct joints. The tar-based sealants used in pre-war Bronx buildings become brittle after decades of heating cycles, cracking at elbows and branch connections where thermal expansion is greatest.
- Disconnected flex duct in attic conversions. In University Heights and similar neighborhoods, homeowners added central air by running flex duct through former crawl spaces, where summer heat and winter cold degrade the plastic faster than in conditioned spaces.
- Asbestos-wrapped ducts with compromised outer jackets. When the canvas or cardboard outer layer tears, the asbestos beneath becomes friable; we coordinate with certified abatement contractors per NYC DEP rules before sealing or repairing.
- Illegal dryer and bath vents dumped into air shafts. This Hunts Point and Mott Haven specialty creates pressure imbalances that pull conditioned air out of living spaces and introduce humidity and lint into wall cavities.
Pricing for Duct Sealing in Bronx, NY
Duct sealing in Bronx typically runs $450 – $1,200 for residential systems, with most jobs landing between $550 and $850. What moves you within that range: how many registers and branch lines need attention, whether we can access joints from existing openings or need to create new ones, and whether your system requires pre-sealing cleaning or asbestos coordination. We also offer Air Duct Cleaning in Bronx as a bundled service when both are needed, which can reduce overall cost compared to separate visits. Every price is written down and agreed before work starts. No per-vent add-ons, no surprises at the door. Call (361) 326-5060 for a free estimate; we’ll inspect your system, show you the leaks with a camera if accessible, and give you a flat price you can take to your landlord, co-op board, or spouse.
We Also Serve Cities Near Bronx
Our crews work throughout the metro area, and we regularly schedule Duct Sealing appointments in Mount Vernon to the north, Manhattan to the south and west, Yonkers along the county line, and Brooklyn across the bridges. If you’re in these areas, the same pricing structure, equipment, and 365-Day Done Right Promise apply. We also handle Dryer Vent Cleaning in Bronx and surrounding communities for property managers who need bundled service.
Serving Bronx, NY - Our Local Coverage Area
We’re based in the Bronx 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 Bronx
We typically schedule duct sealing appointments within 3 – 5 business days for Bronx addresses, with dispatch coordinated from our New York City office. Call (361) 326-5060 to check current availability; we’ll give you a firm date and arrival window, not a vague “sometime next week.”
We seal ducts across all Bronx neighborhoods, including Riverdale, Fordham, Hunts Point, Mott Haven, University Heights, Pelham Bay, and Throgs Neck. Our technicians are familiar with the specific building types in each area, from pre-war elevator apartments to post-war row houses.
We do not classify duct sealing as an emergency service; it’s a scheduled repair that requires proper assessment and material preparation. However, our phones are answered by a live person 24/7, and we will expedite scheduling if your situation involves a health or safety concern, such as asbestos exposure from damaged duct wrap.
Bronx duct sealing costs are comparable to Mount Vernon and Yonkers, sometimes slightly higher than outer suburbs due to parking constraints, building access complexity, and the prevalence of plaster-wall construction that requires more careful technique. We do not charge a borough premium; our pricing reflects actual labor and material requirements for your specific building.
Every duct sealing job is covered by our 365-Day Done Right Promise in writing. If any sealed joint fails, leaks recur, or the original problem returns within one year, Hollis returns and corrects the work at no charge, including a free second visit. This applies to all Bronx locations and is backed by the Garrison Partners family track record since 2004.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Bronx since 2004.