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 Yonkers
We dispatch our duct sealing crews to Yonkers from our New York City office, and we’ve learned the city’s streets well enough to hit our arrival windows. Yonkers isn’t like the counties south of it. The housing stock here runs old, the duct systems run older, and the problems we find in Park Hill basements don’t show up in a 2005 split-level in White Plains. If your vents blow dust every time the heat kicks on, or your basement smells musty when the air handler runs, the fix is usually not another cleaning. It’s sealing. Call us at (361) 326-5060. We price every job in writing before we touch anything, and we back it with our 365-Day Done Right Promise.
Why Hollis Air Duct Cleaning Is Yonkers’s Preferred Duct Sealing Company
We’ve been serving Westchester County homeowners since 2004 as part of the Garrison Partners family, and Yonkers has become one of our most frequent calls. Not because the work is easy. Because it’s necessary, and too few crews know how to do it right on a 1920s system.
Our technicians are background-checked, uniformed, and trained to The Garrison Standard. That means arriving inside the quoted window, pricing in writing before work starts, and leaving the site clean. No exceptions. Our 365-Day Done Right Promise covers every duct sealing job in writing: if the work fails within a year, we return and make it right at no charge, including a free second visit.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. When you call (361) 326-5060, you talk to someone who can book your appointment.
We know Yonkers. We know which Crestwood Tudors still run original galvanized returns, which northwest Yonkers ranches got their ducts sealed properly in the 1980s and which didn’t, and why the Hudson River humidity makes basement ductwork here different from drier inland counties. That local knowledge changes what we find and how we fix it.
HVAC Duct Sealing in Yonkers
HVAC Duct Sealing in Yonkers is rarely a simple matter of running tape around a few joints. In this city, we’re most often working on systems that were retrofitted from gravity-fed coal heating decades ago, with original galvanized steel or even wooden duct runs now carrying forced air through joints that have never been properly sealed. The job involves inspecting the full duct network with camera equipment, identifying leaks at joints and seams, sealing with mastic and mesh (not duct tape, which fails), and testing airflow before and after to verify the fix. A typical HVAC duct sealing job in Yonkers runs $800 – $1,800 for a single-system home, depending on accessibility and the condition of the original ductwork. Homes with multiple zones or extensive basement crawl space runs can run higher.
Sealing Retrofitted Gravity Systems
The large central returns installed for coal gravity heating were never designed for forced air. They’re often undersized, creating negative pressure that pulls in basement and crawl space air. We seal these returns completely and verify they stop drawing from outside the conditioned space.
Mastic Application on Rusted Galvanized Joints
Decades of Yonkers humidity have corroded many original joints. We wire-brush rust to bare metal, apply fiberglass mesh reinforcement, then coat with duct mastic rated for the temperature swings these systems see. It’s slower than tape. It lasts.
Duct Repair in Yonkers
Duct Repair in Yonkers frequently starts as a call for cleaning and ends with us rebuilding sections of the system. We find crushed runs in tight basement retrofits, disconnected joints where vibration has worked straps loose, and rusted-out sections that need replacement before any sealing can hold. The repair work involves cutting out damaged sections, fabricating replacements from galvanized sheet metal, reconnecting runs with proper mechanical fasteners, and then sealing the entire assembly. A straightforward duct repair in Yonkers typically costs $400 – $900; extensive rebuilds with multiple sections and difficult access can reach $1,200 – $2,000. Every repair gets a written price before we start, and every repair is covered by our 365-Day Done Right Promise.
Reconnecting Disconnected Runs
Camera inspection often reveals separations we couldn’t see from the register. We reconnect with sheet metal screws and draw bands, then seal the joint. No shortcuts. A disconnected return in a Park Hill basement can pull musty air for years before anyone finds it.
Replacing Crushed or Rusted Sections
Some damage is too far gone to seal. We fabricate replacement sections on site, match the original diameter, and install with proper slope and support so the new work doesn’t fail the same way.
Trusted Brands We Service in Yonkers
Our equipment roster includes Rotobrush rotary brush systems for agitation inside ductwork, Nikro negative-air machines for controlled debris removal, and HEPA filtration from Abatement Technologies to keep your home clean during the job. For homeowners who want upgraded filtration after sealing, we stock Honeywell and Aprilaire media filters and Guardsman UV systems. We carry common duct repair parts and sealing materials on every Yonkers truck, so most jobs don’t wait for a parts run. That matters on older systems where a rusted joint or crushed run needs same-visit attention.
Common Duct Sealing Problems We See in Yonkers Homes
- Sealant failure at rusted galvanized joints. Yonkers’ humid summers and dry winter heating cycles expand and contract metal ducts for decades. Original joints that were never sealed properly, or were sealed with tape that dried out, leak steadily. We find these by pressure testing, not guessing.
- Crushed or disconnected runs in tight basement retrofits. Park Hill and Crestwood gravity-system conversions often forced modern ductwork through spaces never designed for it. We regularly find returns crushed against foundation walls or supply joints that have vibrated apart.
- Negative pressure from undersized central returns. The big return ducts built for coal gravity systems are too small for modern air handlers. They run under negative pressure, pulling dust, mold spores, and crawl space odors into living areas. Sealing alone won’t fix this; we resize or supplement the return path.
- Hudson River humidity driving mold in unlined ducts. The river moisture加载s summer air that condenses in cool basement ductwork. We seal to prevent warm, humid outside air from entering, and we flag active mold for remediation before sealing traps it inside.
Pricing for Duct Sealing in Yonkers, NY
We’re direct about numbers because we’ve seen what bait-and-switch pricing does to homeowners in this market.
| Service | Typical Range in Yonkers |
|---|---|
| Basic duct sealing (single system, accessible basement) | $800 – $1,200 |
| Moderate sealing with some repairs (rusted joints, minor disconnections) | $1,200 – $1,800 |
| Extensive repair and sealing (multiple crushed runs, return resizing) | $1,800 – $2,800 |
| Duct repair (section replacement, reconnections) | $400 – $900 per section |
| Full duct inspection with camera and airflow testing | $150 – $250 (credited toward sealing work) |
What moves you up or down within these ranges: accessibility (crawl space vs. full basement), number of zones, condition of original duct material, and whether we find damage that needs repair before sealing can hold. We inspect first, price in writing, and get your approval before any work starts. The price does not move at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Yonkers
Our crews regularly work in Yonkers and the surrounding area, including Mount Vernon, New Rochelle, White Plains, and the Bronx. Each community has its own housing stock and duct conditions, and we adjust our approach accordingly. If you’re just outside Yonkers city limits, call us. We likely already work in your neighborhood.
Serving Yonkers, NY - Our Local Coverage Area
We’re based in the Yonkers 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 Yonkers
Yonkers’ historic neighborhoods contain a high concentration of retrofitted gravity-fed heating systems with original unlined galvanized or wooden ducts that were never designed for forced air. These systems leak at every joint, drawing coal-era dust, crawl space odors, and humid Hudson River air into living spaces. Newer suburbs built with sealed, insulated flex duct don’t have this problem. Call (361) 326-5060 if you’re seeing dust or smelling musty air from your vents.
Yes, we seal galvanized steel ducts regularly after addressing any active rust or structural damage. Wooden ducts are less common and require case-by-case evaluation; we inspect for rot, pest damage, and asbestos insulation before recommending sealing or replacement. We never seal over active mold or severely deteriorated material. Call (361) 326-5060 and we’ll camera-inspect to give you a straight answer.
We stop the cleaning, show you the camera footage, and give you a written price to reconnect and seal the run before continuing. A disconnected return in a Park Hill basement can undermine every other duct in the system. We don’t clean past a disconnection without fixing it; that would just blow debris into your walls. Call (361) 326-5060 if you suspect a disconnected run.
Persistent dust from vents after cleaning, musty odors when the system runs, uneven heating or cooling between rooms, and high utility bills despite normal equipment operation all point to leaky ducts. If your basement smells worse when the air handler kicks on, you likely have negative pressure from a leak. Call (361) 326-5060 for an inspection that includes pressure testing.
Proper sealing prevents warm, humid outside air from entering the duct system through leaks, which reduces condensation on cool duct surfaces in summer. Sealing alone won’t eliminate active mold; we flag that for remediation first. But sealed ducts don’t draw damp basement air, and that’s a significant factor in Yonkers homes near the river. Call (361) 326-5060 to discuss your specific situation.
Ready to Stop the Dust and Musty Air? Call Hollis Air Duct Cleaning
We’ve sealed ducts in Park Hill Tudors, Crestwood Victorians, and northwest Yonkers ranches that were leaking for decades before anyone found the problem. Our Duct Sealing team arrives in a marked van, in uniform, with the tools to inspect, price, and fix your system in the same visit when possible. Every job gets a written price before work starts and our 365-Day Done Right Promise in writing. No per-vent pricing games. No estimates that balloon once we’re inside. If you live in Yonkers and you’re tired of dust, odors, or rooms that never heat evenly, call (361) 326-5060 for a free estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Yonkers and Westchester County.