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 Brooklyn
Duct sealing in Brooklyn typically runs $800 – $2,400 for a whole-house system, with most brownstone and pre-war walk-up jobs falling between $1,200 and $1,800. We’re Hollis Air Duct Cleaning, and our crews handle Brooklyn’s older housing stock every week, from Park Slope brownstones to Crown Heights walk-ups with original galvanized trunks hidden behind plaster. Dispatch and scheduling are coordinated from our Cleveland office, but the technicians who arrive at your door know Brooklyn’s buildings. They carry mastic, mesh, and HEPA containment gear for the asbestos tape and painted-over wraps we regularly encounter here. Call (361) 326-5060 and we’ll send a crew who understands what your walls are hiding.
Why Hollis Air Duct Cleaning Is Brooklyn’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Brooklyn reputation is built on showing up inside the quoted window, pricing in writing before any work starts, and leaving the site clean. Our technicians are background-checked and uniformed, accountable to The Garrison Code on every job. Homeowners in Brooklyn Heights and Flatbush tell us the same thing: they called us after another crew quoted low, then found “surprise” problems that doubled the bill. That doesn’t happen here. The price we write down is the price you pay. Every repair is covered by our 365-Day Done Right Promise – 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.
Duct Insulation in Brooklyn
Duct Insulation in Brooklyn addresses a specific problem: unconditioned basement and crawl space runs that bleed heat in January and sweat in July, especially in pre-war buildings where galvanized trunks pass through uninsulated wall cavities. We wrap accessible supply and return lines with formaldehyde-free fiberglass or foil-faced insulation, sealing the vapor barrier to prevent condensation that feeds mold. In Brooklyn’s humid climate, this matters. A typical duct insulation job here runs $600 – $1,500 depending on linear footage and accessibility.
Basement Runs in Older Homes
Most Brooklyn basements flood eventually. When they do, wet insulation becomes a mold vector. We remove saturated material, dry the trunk, and reinstall with a moisture barrier rated for below-grade use. Our crews carry infrared cameras to find the cold spots you can’t see.
Attic and Crawl Space Applications
Few Brooklyn homes have full attics, but converted brownstones sometimes have partial crawl spaces above third-floor additions. These runs lose the most energy. We insulate and seal simultaneously, testing with a duct blaster to verify the fix.
HVAC Duct Sealing in Brooklyn
HVAC Duct Sealing in Brooklyn is rarely a simple matter of brushing mastic on joints. Our crews start with a pressure test to map leakage, then use a camera to inspect inside galvanized trunks that may be wrapped in asbestos tape or painted over multiple times since the 1940s. We seal with water-based mastic and fiberglass mesh on accessible joints, and apply aerosol sealant for leaks inside finished walls where demolition isn’t practical. A typical HVAC duct sealing job in Brooklyn costs $1,200 – $2,200 for a brownstone or walk-up, with simpler post-war apartment systems sometimes running $800 – $1,400.
Pressure Testing Before Sealing
We don’t guess. A duct blaster fan pressurizes the system and measures cubic feet per minute of leakage. In Brooklyn’s gravity-furnace conversions, we often find 30 – 40% leakage – heated air pouring into basements and wall cavities instead of reaching bedrooms. The number tells us where to look.
Aerosol Sealant for Inaccessible Runs
When ducts are buried in plaster walls – common in pre-war walk-ups near Prospect Park – we inject non-toxic aerosol sealant particles that accumulate at leak points. No demolition. No dust. The process takes 2 – 4 hours and reduces leakage by 80 – 90% in most systems we treat.
Trusted Brands We Service in Brooklyn
Our equipment roster includes Rotobrush rotary brush systems for mechanical cleaning, Nikro negative-air machines for containment, and filtration products from Honeywell, Aprilaire, and Guardsman. We stock parts and materials locally for Brooklyn customers, so turnaround on sealant, mesh, and insulation is same-day in most cases. For the specialized HEPA vacuums and containment gear required by asbestos-wrapped trunks, we source through Abatement Technologies – the same equipment commercial remediation crews use. When you call Hollis, you’re not waiting for a parts run to New Jersey.
Common Duct Sealing Problems We See in Brooklyn Homes
- Asbestos tape on galvanized trunks. In pre-war walk-ups from Crown Heights to Bedford-Stuyvesant, original duct joints are wrapped in asbestos-containing tape. Sealing mastic won’t bond to it, and disturbing it without containment violates EPA guidelines. We isolate, document, and arrange proper abatement before sealing.
- Gravity-furnace octopus conversions. Brownstones in Park Slope and Brooklyn Heights still have massive cast-iron trunks from coal-fired gravity furnaces, now connected to modern blowers. The mismatch creates turbulent airflow and dozens of undocumented leaks. Sealing one joint without testing the whole system just moves the problem.
- Crushed returns behind plaster. Our camera finds returns flattened during decades of renovation, electrical work, or structural repair. No amount of sealing the accessible joints fixes a crushed branch. We locate, expose, and rebuild before sealing.
- Mold in flooded basements. Brooklyn’s summer humidity and stormwater infiltration breed mold in low returns. Seal over it and you trap spores behind the mastic. We treat the source first, then seal dry, verified-clean ducts.
Pricing for Duct Sealing in Brooklyn, OH
Whole-system duct sealing in Brooklyn typically costs $1,200 – $2,400 for brownstones and pre-war walk-ups with complex accessibility issues. Simpler post-war apartment systems with exposed basement runs run $800 – $1,500. Duct insulation adds $600 – $1,500 depending on linear footage. What moves the price: asbestos wrap requiring containment (+$400 – $800), aerosol sealant for inaccessible runs (+$300 – $600), and mold or moisture remediation that must precede sealing (+$500 – $1,200). We give you one flat price per system, agreed in writing before any work starts. No per-vent pricing, no add-ons at the door. Every estimate is free. Call (361) 326-5060 for an exact quote on your building.
We Also Serve Cities Near Brooklyn
Our crews travel throughout the metro area for Duct Sealing in Brooklyn and surrounding communities. We regularly handle jobs in Columbus, Cleveland, Parma, and Lorain, with the same written pricing and 365-Day Done Right Promise on every call. If you’re outside Brooklyn city limits, we still dispatch from our Cleveland office and arrive inside the quoted window.
Serving Brooklyn, OH - Our Local Coverage Area
We’re based in the Brooklyn 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 Brooklyn
Musty smells usually mean active mold in the return duct or standing water in a low branch, not surface dust. Cleaning removes debris but doesn’t dry the system or kill mold colonies. We inspect with a borescope, treat contamination with EPA-registered antimicrobial, then seal only after verifying the trunk is dry. Call (361) 326-5060 for an exact quote – estimates are free.
Yes, but it requires a custom approach. Octopus trunks are oversized for modern blowers, with dozens of irregular branches and often asbestos wrap at joints. We pressure-test the system, contain any hazardous wrap, and seal accessible joints with mastic and mesh. For leaks inside finished walls, we use aerosol sealant. The work typically runs $1,800 – $2,400 in Park Slope and Brooklyn Heights brownstones.
Replace when the duct is crushed, corroded through, or contaminated with mold that can’t be fully remediated. Seal when the material is sound but joints have opened or branches are disconnected. Our camera inspection shows you exactly what we see. In most Brooklyn pre-war buildings, the galvanized steel itself lasts; it’s the connections that fail. Call (361) 326-5060 and we’ll show you the footage before recommending either approach.
Yes, significantly. We measure 25 – 45% leakage in unsealed pre-war systems, meaning a quarter to nearly half your heated air never reaches the rooms. At Brooklyn’s winter utility rates, that adds $40 – $80 per month for a typical 1,200-square-foot unit. Sealing pays for itself in 18 – 30 months in most buildings we treat.
Minimal disruption. We access the basement or utility closet for the pressure test and camera inspection. Aerosol sealant for inaccessible runs injects through existing registers – no wall demolition. For exposed basement joints, we lay containment sheeting and work with mastic and mesh. Most walk-up jobs finish in one day. You’ll receive before-and-after pressure-test numbers and photos of the sealed joints. Call (361) 326-5060 to schedule.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Brooklyn and the greater Cleveland metro since 2004.