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 New York City
Duct sealing in New York City typically runs $450 – $1,200 for a standard residential system, with most jobs completed in a single visit after a written estimate. We’re Hollis Air Duct Cleaning, and our New York City office coordinates crews who know the difference between a pre-war high-rise on the Upper West Side and a converted loft in Tribeca. Roy Castellanos and our team have sealed ducts in buildings where the original galvanized steel dates back to the 1920s, and we’ve navigated the mechanical shafts that newer suburban contractors wouldn’t know how to access. Call (361) 326-5060 for a free estimate with a written price that won’t change once we’re inside.
Why Hollis Air Duct Cleaning Is New York City’s Preferred Duct Sealing Company
We’ve been doing this since 2004 as part of the Garrison Partners family, and that longevity matters in a market where fly-by-night operators buy a van and a magnet sign, then disappear. Our technicians are background-checked, uniformed, and held to The Garrison Code: arrive inside the quoted window, price in writing before touching anything, finish by the book, leave the site clean. New York City customers get the same standard.
Phones here are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no “leave a message and we’ll call back Monday.” When you’re dealing with a building management office that only takes contractor calls during business hours, or a co-op board that needs scheduling confirmation in writing, that accessibility matters.
Our equipment includes professional-grade duct sealing mastic and aerosol sealant systems from Nikro and Abatement Technologies, the same tools commercial crews use in Manhattan office towers. We don’t show up with hardware-store caulk and hope for the best. Every repair carries our 365-Day Done Right Promise in writing: if the seal fails within a year, we return and make it right at no charge, including a free second visit.
New York City’s housing stock creates problems generic duct sealers don’t anticipate. Original vertical riser ducts in older buildings often have asbestos-containing insulation that requires special handling. Steam-heat systems common in pre-war buildings produce condensation that degrades seals faster than forced-air setups. Our crews know to check for these conditions before quoting, not after they’ve started work.
Duct Insulation in New York City
Duct Insulation in New York City addresses a problem most homeowners don’t notice until their Con Edison bill spikes: conditioned air bleeding through thin or degraded insulation in ducts that run through unheated mechanical shafts, exterior walls, or between floors in high-rise buildings. In a city where summer humidity regularly pushes 70% and winter temperatures drop below 20°F, poorly insulated ducts force your HVAC to work harder year-round. A typical duct insulation job in New York City runs $600 – $1,800 depending on accessible linear footage and whether we’re working in a basement mechanical room or a cramped shaft between the 8th and 12th floors.
When Insulation Beats Sealing
Sometimes the duct itself is structurally sound with tight joints, but the wrap around it has compressed, torn, or absorbed moisture. In waterfront buildings from Battery Park City to parts of Brooklyn facing the harbor, salt air accelerates corrosion of the metal and breakdown of older fiberglass wraps. We assess whether new insulation solves the problem or if the underlying duct needs sealing first.
Material Selection for High-Rise Constraints
Fire code in New York City buildings often restricts insulation materials to specific flame-spread ratings. We carry appropriate products from Honeywell and Guardsman that meet these requirements, and we document what was installed for building management records. No guesswork, no surprises at inspection.
HVAC Duct Sealing in New York City
HVAC Duct Sealing in New York City closes the gaps, cracks, and disconnected joints that leak conditioned air before it reaches your rooms. In a typical pre-war apartment building, we’ve measured systems losing 25 – 40% of heated or cooled air through leaks in the ductwork, which means you’re paying to condition the inside of your walls or the mechanical shaft three floors down. A standard residential HVAC duct sealing job in New York City costs $450 – $1,200, with larger systems in townhouses or duplex units running toward the higher end.
Aerosol Sealant for Inaccessible Ducts
Many New York City ducts are buried inside structural elements that can’t be opened without major renovation. Our aerosol duct sealing process pressurizes the system and seals leaks from the inside, reaching joints behind plaster and brick that manual methods can’t touch. It’s particularly effective in brownstone renovations where original duct paths were preserved but never properly sealed.
Mastic Application for Accessible Joints
Where we can reach the ductwork directly, we apply duct sealing mastic, a thick, flexible compound that outlasts foil tape by decades. In buildings near the East River or Hudson where humidity swings are extreme, mastic’s durability matters more than a quick-fix tape job that will peel within two seasons.
Trusted Brands We Service in New York City
We seal and insulate duct systems connected to equipment from Honeywell, Aprilaire, and other major HVAC brands, and we stock compatible sealing materials and filtration components for fast turnaround. Our Nikro negative-air machines and Rotobrush rotary systems aren’t just for cleaning; they’re diagnostic tools that help us locate leaks before we quote a sealing scope. When a building on the Upper East Side needs a seal verified and a filter swapped in the same visit, we don’t waste a week ordering parts. Roy Castellanos made sure our New York City warehouse carries the consumables that local building engineers request most often.
Common Duct Sealing Problems We See in New York City Homes
- Disconnected flex duct in renovated lofts. SoHo and DUMBO conversions often hide flex duct behind new drywall without proper support, causing sagging and separation at joints. We find these leaks with camera inspection before sealing.
- Corroded galvanized steel in pre-war risers. Buildings from the 1920s – 1950s have original metal ducts that have rusted through at seams, especially in waterfront properties where salt air accelerates deterioration. Sealing alone won’t hold; we assess whether patching or replacement is needed first.
- Poorly sealed returns pulling attic or shaft air. In high-rises with central systems, leaky return ducts draw unconditioned air from mechanical spaces, mixing odors and contaminants between units. This cross-contamination issue is nearly unique to New York City’s vertical building stock.
- Condensation damage from steam-heat conversion. Pre-war buildings converted from steam radiators to forced air often retain moisture in ductwork from the old system, degrading new seals within months. We identify these conditions and recommend proper drainage before sealing.
Pricing for Duct Sealing in New York City, NY
Here’s what duct sealing actually costs in the New York City market:
| Service | Typical Range |
|---|---|
| Standard residential duct sealing (single system) | $450 – $1,200 |
| Duct insulation (wrap/replacement) | $600 – $1,800 |
| Aerosol sealant for inaccessible ductwork | $800 – $2,000 |
| High-rise or commercial system sealing | $1,500 – $4,500+ |
What moves you within these ranges: system size, accessibility (basement mechanical room versus 14th-floor shaft), whether we need to coordinate with building management for access, and whether asbestos abatement is required before we can seal. We give one flat price per system, agreed in writing before work starts. No per-vent pricing, no add-ons at the door. You’ll see before-and-after photos of your own ducts, and if the seal fails within a year, our 365-Day Done Right Promise covers a free return visit. Call (361) 326-5060 for an exact quote; estimates are free.
We Also Serve Cities Near New York City
Our New York City office dispatches crews throughout the metro area, including Air Duct Cleaning in New York City and Dryer Vent Cleaning in New York City for residents in Brooklyn, Queens, Manhattan, and Staten Island. Each job gets the same written price guarantee and 365-Day Done Right Promise, whether we’re sealing ducts in a Park Slope brownstone or a Staten Island colonial.
Serving New York City, NY - Our Local Coverage Area
We’re based in the New York City 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 New York City
We typically schedule duct sealing within 3 – 5 business days for standard requests in Manhattan, Brooklyn, and Queens, with Staten Island and outer Queens sometimes needing an extra day for crew routing. Emergency situations, like a disconnected duct leaking into a neighbor’s unit, get prioritized. Call (361) 326-5060 to check current availability; estimates are free.
Yes. We seal ducts from the Upper West Side and Harlem down through the Financial District, across to Williamsburg and Park Slope, and out to Astoria, Flushing, and St. George. Our crews carry the access credentials and insurance documentation that co-op and condo boards in New York City typically require.
We handle urgent duct leaks that are affecting multiple units or creating safety hazards, like carbon monoxide risks from backdrafting. Phones are answered by a live person 24/7, and we’ll dispatch if the situation warrants immediate attention. For non-urgent sealing, we schedule during standard hours to ensure proper access coordination with building management.
Generally yes, by 15 – 25% compared to Westchester or northern New Jersey. Parking, building access coordination, and the complexity of working in high-rise mechanical shafts add time that suburban ranch jobs don’t require. We absorb some of this through efficient routing, but we don’t pretend a 20th-floor shaft job costs the same as a basement in Bergen County. Our written estimate shows exactly what you’re paying for.
Every duct sealing job carries our 365-Day Done Right Promise in writing: if the seal fails within one year of completion, Hollis returns and repairs it at no charge, including a free second visit. This applies to all New York City work and is backed by our Garrison Partners family track record since 2004. Call (361) 326-5060 for details or to schedule your free estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving New York City since 2004 as part of the Garrison Partners family.