Fast, Reliable Duct Repair & Sealing Across Old Greenwich
We’re Bellows Air Duct & Vent Co. of New York, and we’ve been driving out to Old Greenwich since 1984. Most days, we’re on Sound Beach Avenue or down by Shore Road within the hour. Old Greenwich isn’t a pin on a map for us. It’s where we find the same salt-air duct damage, season after season, in the same coastal neighborhoods. We know the 06870 ZIP, the older colonials off Tomac Avenue, and the seasonal homes near Binney Park that sit empty through February. When your ducts are leaking conditioned air into the walls or pulling salt-corroded particulate through the returns, you want someone who recognizes the problem before they open the toolbox. Call us at (833) 348-8789. We’ll answer, we’ll show up when we say, and we’ll give you one honest price before we start.
Why Bellows Air Duct & Vent Co. of New York Is Old Greenwich’s Preferred Duct Repair & Sealing Company
We’ve built our name in Old Greenwich on showing up and standing behind the work. Our 90-Day Done Right Promise is stamped on every job, no paperwork, no arguing. If it’s not right, we make it right.
Homeowners from Riverside to Cos Cob call us because we’ve been at this for over 42 years. Lou Ferrante has run Bellows since the beginning, and the company’s values haven’t changed. Calls are answered by a live person, 24 hours a day. Not a voicemail. Not an app. A real person who can dispatch a technician.
Our crews are background-checked and uniformed, and most Duct Repair & Sealing jobs in Old Greenwich are completed in a single visit. We camera-inspect before and after every job. You see what we see. That’s the difference between a claim and a record.
We don’t bait-switch. The price we quote on the phone is the price on the invoice. We’ve seen too many Old Greenwich homeowners burned by low-ball coupons that balloon once the truck is in the driveway. That’s not how we work.
Our Duct Repair & Sealing Services in Old Greenwich
Duct Sealing
Leaky ducts in Old Greenwich waste more than money. They pull salt-laden coastal air straight from your attic or crawl space into the system. We seal with mastic sealant, not tape that peels in humid conditions. Mastic is brushed onto joints and seams, hardens flexible, and holds against the humidity that comes off Long Island Sound year-round. For homes near Greenwich Point, where we’ve found oxidation film coating metal segments, proper sealing is the barrier between your living space and the corrosive air outside the duct envelope.
Metal Duct Repair
Old Greenwich’s 1920s-1960s housing stock is full of galvanized metal ductwork that was never built for today’s HVAC loads. Add decades of salt-air corrosion, and you get joint separation, pinholes, and collapsed runs. We repair metal ducts with galvanized or stainless steel where corrosion is active. On a job near Tod’s Point, our crew found that salt-air corrosion had eaten through galvanized duct joints in a 1930s colonial, causing leaks that bypassed the cooling coil. We sealed the compromised runs with mastic and replaced a corroded flex duct section with insulated metal, using stainless steel fasteners to resist future corrosion. That’s the kind of field knowledge you don’t get from a dispatcher in another state.
Flex Duct Repair
Flex duct runs in Old Greenwich homes collect coastal particulate over decades. They sag, pinch, or collapse entirely, especially in older systems where the original installer didn’t account for static pressure. We replace damaged flex with properly sized, insulated runs that can handle modern airflow demands. In seasonal homes that sit vacant, flex ducts are also where moisture stagnates. We flag these sections during camera inspection and recommend replacement when the inner liner is compromised.
Duct Insulation
Uninsulated or degraded duct insulation in Old Greenwich means condensation on cold supply lines in summer, when the humidity spikes. That moisture feeds microbial growth and corrodes metal from the outside in. We install new insulation vapor-sealed at the seams, critical for homes within blocks of the Sound where the dew point stays elevated.
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 Old Greenwich
We carry parts and materials from Honeywell, Aprilaire, and Abatement Technologies, the same brands serious HVAC contractors specify. For Old Greenwich homeowners, that means faster turnaround. We don’t order obscure fittings from a warehouse three states away. Our trucks stock galvanized and stainless fasteners, mastic compounds rated for humid coastal zones, and insulated flex duct in common diameters. Most repairs are completed same-day because we arrive prepared for what this specific coastline does to ductwork.
Common Duct Repair & Sealing Problems We See in Old Greenwich Homes
- Salt-air corrosion of galvanized joints. Technicians servicing homes within blocks of Greenwich Point consistently find a reddish-orange oxidation film coating the interior of metal duct segments. This is visible evidence of salt-air corrosion that standard inland duct-cleaning routes never encounter. We flag compromised joints before cleaning dislodges scale that would redistribute through your system.
- Joint separation in aging metal ductwork. The older galvanized metal duct runs common in Old Greenwich’s 1920s-1960s homes accumulate decades of coastal particulate and are prone to joint separation as they age. Higher static pressure from modern HVAC equipment accelerates the failure.
- Flex duct collapse or pinching. Older flex duct runs were not sized for today’s multi-zone, higher-static loads. In Old Greenwich, coastal particulate adds weight and stiffness, making pinching and collapse more likely under pressure.
- Moisture stagnation in seasonal homes. Homes that are partially or seasonally vacant sit with HVAC systems off for months. Moisture condenses and stagnates inside ductwork. When the system restarts, that moisture drives microbial growth and can trigger seal failures and corrosion of metal components.
Pricing for Duct Repair & Sealing in Old Greenwich, NY
A typical duct sealing job in Old Greenwich runs $450-$850 for a single system, depending on access and linear footage. Metal duct repair, including joint rebuilding and mastic application, typically falls between $320-$680. Flex duct replacement runs $180-$340 per section, with insulated metal upgrades at the higher end. Full duct insulation refresh for an average colonial runs $1,200-$2,400.
What moves the number: accessibility (crawl space vs. finished basement), extent of corrosion damage, and whether we’re matching existing materials or upgrading to salt-resistant components. We disclose every line item before work begins. No changes at the door. Mention this page and we’ll apply our $50 Off Any Repair Over $250. Seniors and veterans receive a permanent 5% discount. Call (833) 348-8789 for a free estimate with exact numbers for your home.
We Also Serve Cities Near Old Greenwich
Our crews cover the full coastal corridor. We regularly service Duct Repair & Sealing in Old Greenwich and the surrounding communities: Riverside, Cos Cob, Stamford, and central Greenwich. Same trucks, same technicians, same upfront pricing. If you’re in 06870 or the neighboring ZIPs, we’re already nearby.
Serving Old Greenwich, NY - Our Local Coverage Area
We’re based in the Old Greenwich 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 - Duct Repair & Sealing in Old Greenwich
That reddish-orange film is oxidation from salt-laden coastal air entering your return system. It’s visible evidence of corrosion that inland ductwork rarely shows. We flag these segments during camera inspection and recommend sealing or replacement before the metal fails entirely. Call (833) 348-8789 and we’ll show you exactly what we’re seeing.
We recommend inspection every 3-5 years for homes within a few blocks of the Sound, and sealing or repair as needed. Salt-air corrosion accelerates joint failure compared to inland Fairfield County. Seasonal vacancy adds moisture risk. Our $89 Seasonal Tune-Up includes a camera look at accessible duct runs. Call to schedule.
We use mastic sealant (not tape), stainless steel fasteners in corroded zones, and insulated metal replacement sections where flex has failed. These materials resist the humidity and salt particulate that standard hardware cannot. We specify based on what your camera inspection shows.
Yes, when the inner liner is degraded or the run is undersized for current HVAC loads. Old flex in these homes often carries decades of coastal particulate and sags under pressure. Replacement with properly sized, insulated flex or metal improves airflow and reduces salt-air infiltration. We’ll show you the camera footage and give you a straight recommendation.
Sealing alone won’t eliminate existing mold, but it prevents future moisture infiltration that feeds regrowth. We typically pair sealing with source remediation, then seal the envelope so conditioned air stays separate from humid attic or crawl space air. For homes reopening after seasonal vacancy, we recommend inspection before restart. Call (833) 348-8789 for a free estimate.
Written by Lou Ferrante, Owner at Bellows Air Duct & Vent Co. of New York, serving Old Greenwich since 1984.