Fast, Reliable Duct Repair & Sealing Across Near North Side
Most duct repair calls we get from Near North Side come from two kinds of buildings: Gold Coast greystones and courtyard buildings where forced air was shoehorned into spaces built for steam radiators, and River North lofts where the flex duct installed during 1990s residential conversions is now failing behind finished ceilings. If your vents are barely pushing air, your energy bills have climbed without explanation, or you’re noticing dust streaks around ceiling diffusers, there’s a good chance your ductwork has separated, collapsed, or never been properly sealed in the first place. We answer calls live 24 hours a day at (844) 685-6342, and most Near North Side jobs are scheduled same-day or next-day.
Our Duct Repair & Sealing crew has worked in 60610 buildings for years. We know the non-standard duct pathways you’ll find here: runs routed through dropped ceilings, converted utility chases, closet soffits. These configurations take longer to diagnose and repair than purpose-built forced-air construction, but they’re what we handle every week. We’re familiar with the local permit requirements through the City of Chicago Department of Buildings, and we carry the insurance and bonding required for multi-unit residential work in Cook County.
Why Bellows Air Duct & Vent Co. Is Near North Side’s Preferred Duct Repair & Sealing Company
We’ve been serving Chicago-area homeowners since 1984, and Near North Side has been part of our route for decades. Ray Castillo built this company on the idea that a homeowner should know the full price before any tool touches their property, and that the work should be done right without the homeowner having to chase anyone down. That still holds.
Our technicians are background-checked and uniformed, and they arrive with camera inspection equipment to show you exactly what your ducts look like before we start and after we finish. No claim without proof. The 90-Day Done Right Promise applies to every Near North Side job: if something isn’t right, we return at no charge. No paperwork to file, no argument.
Calls are answered by a live person, 24/7. Not an app, not a voicemail tree. Most repairs are completed in a single visit. We disclose pricing upfront, before work begins, and we honor our standing offers: $50 off any repair over $250, a free second opinion on any written estimate, and a permanent 5% discount for seniors and veterans.
Our Duct Repair & Sealing Services in Near North Side
Duct Sealing
Leaky ducts can waste 20 to 30 percent of conditioned air before it reaches your rooms. In Near North Side’s retrofit buildings, the problem is often worse: greystones and courtyard buildings where ductwork was routed through existing chases never designed for airflow, with gaps at every junction box and diffuser. We seal metal joints with mastic sealant and mechanical fasteners, not tape that dries and peels. For flex duct connections, we use proper clamps and sealant rated for the temperature swings these systems see. A typical duct sealing job in Near North Side runs $450-$850 for a single-family or duplex unit, depending on access and linear footage.
Flex Duct Repair
This is where Near North Side’s housing stock creates unique problems. In River North loft conversions, the original flexible duct liner installed during the 1990s residential buildout is now past its 25-30 year service life. It cracks internally, collapses in sections, and traps decades of cooking grease particulate and construction dust from open-plan layouts. The damage stays invisible behind finished ceilings until airflow drops dramatically or you start smelling old grease every time the system runs.
We recently worked on a duplex loft on Grand Avenue in River North where the flex duct liner in the dropped ceiling had split open, dumping drywall dust and twenty years of cooking grease into the supply plenum. Our crew patched the tear with mastic-sealed metal sleeves and replaced a collapsed run with new insulated flex duct, restoring airflow that had dropped by half. Flex duct repair in Near North Side typically costs $280-$620 per run, with full replacement of multiple runs running $800-$1,400.
Metal Duct Repair
Pre-war greystones and courtyard buildings in the Gold Coast and Old Town often have galvanized steel ductwork that was retrofitted during mid-century conversions or later HVAC upgrades. These metal runs corrode at seams, separate at joints, and suffer from condensation damage in uninsulated masonry chases. The eastern edge of 60610 sits close to Lake Michigan, and that proximity drives humidity swings and persistent winter cold that causes condensation inside ductwork where mechanical rooms and chases lack insulation. We repair separated seams, replace corroded sections, and reinforce weak points with proper metal gauge and sealant. Metal duct repair in Near North Side generally runs $350-$750 for localized work, with full section replacement at the higher end.
Duct Insulation
Uninsulated or degraded duct insulation is a major source of energy loss and condensation problems in Near North Side’s older buildings. In Gold Coast courtyard buildings with masonry basement systems, cold air migrating through uninsulated chases creates moisture that degrades both metal and flex components. We install closed-cell insulation and vapor barriers appropriate for Chicago’s climate, with particular attention to the temperature differentials created by Lake Michigan influence. Duct insulation work in Near North Side typically ranges from $400-$900 for accessible runs, with costs increasing for work in finished soffits or sealed chases.
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 Near North Side
We carry professional-grade equipment and materials from Rotobrush, Nikro, and Abatement Technologies, the same brands serious HVAC contractors specify for commercial and high-end residential work. For Near North Side customers, this means we stock the specialized flex duct, mastic sealants, and insulation materials needed for older and non-standard systems, not just standard new-construction supplies. Most parts are on our trucks, so we’re not waiting on a warehouse run while your system stays down. If we need to order something specific for a pre-war greystone or a particular 1990s loft conversion component, we tell you before we start, with a clear timeline.
Common Duct Repair & Sealing Problems We See in Near North Side Homes
- Cracked 1990s flex duct liner collapsing behind finished ceilings in River North loft conversions. The original flexible duct installed during residential conversion is now brittle, cracking internally while the outer layer looks intact. Airflow drops, dust increases, and eventually the liner collapses completely. We diagnose this with camera inspection and repair or replace runs with minimal ceiling disruption.
- Condensation-driven duct degradation in masonry basements of Gold Coast pre-war courtyard buildings where mechanical chases lack insulation. Lake Michigan humidity and winter cold create constant moisture in uninsulated chases. Metal rusts at seams, mastic fails, and flex duct outer jackets degrade. We address the source with proper insulation and repair the damage.
- Undersized and poorly routed retrofit ductwork in greystones, causing frequent air leaks at junction boxes and ceiling diffusers. Ductwork forced through existing chases in buildings never engineered for it creates sharp bends, excessive runs, and pressure imbalances. Seams separate under strain. We reconfigure where possible and seal permanently where reconfiguration isn’t practical.
- Shared HVAC systems in Old Town courtyard buildings with no maintenance access to common duct runs. Individual unit owners can’t reach leaky shared trunks, and building management often lacks detailed duct documentation. We work with building engineers and individual owners to identify responsibility boundaries and seal accessible sections.
Pricing for Duct Repair & Sealing in Near North Side, IL
We’re straightforward about numbers because we’ve seen what bait-and-switch pricing does to homeowners who’ve already been burned once. Here’s what duct repair and sealing costs in the 60610 market:
| Service | Typical Range in Near North Side |
|---|---|
| Duct sealing (whole system) | $450 - $850 |
| Flex duct repair (single run) | $280 - $620 |
| Flex duct replacement (multiple runs) | $800 - $1,400 |
| Metal duct repair (localized) | $350 - $750 |
| Metal duct section replacement | $600 - $1,200 |
| Duct insulation (accessible runs) | $400 - $900 |
| Emergency/after-hours repair | Standard rate + $150 |
What moves you within these ranges: access difficulty (finished ceilings vs. open basements), linear footage, whether we can reach the damage from existing access points or need to create them, and the condition of connected components. We inspect with a camera before quoting, so you see what we see. Estimates are free. The price we give before work starts is the price on the invoice. Call (844) 685-6342 for an exact quote on your building.
We Also Serve Cities Near Near North Side
Our crews work throughout Chicago and the near-west suburbs. If you’re in Near North Side, West Town, Belmont Cragin, or Cicero, we’re already in your area regularly. Same standards, same upfront pricing, same 90-Day Done Right Promise. Call (844) 685-6342 and we’ll schedule you from wherever you’re calling.
Serving Near North Side, IL - Our Local Coverage Area
We’re based in the Near North Side 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 Near North Side
Replace them if the liner is cracked or collapsed internally, which is the condition we find in most 1990s River North conversions at this point. Repair with mastic-sealed metal sleeves works for isolated tears in otherwise sound flex duct, but brittle liner will continue failing. A camera inspection tells us which applies to your system. Call (844) 685-6342 to schedule one, estimates are free.
Yes, we seal ductwork in shared chases with steam pipes regularly in Near North Side greystones and courtyard buildings. We use high-temperature mastic sealant and proper clearances per Chicago code, and we document the configuration for your records. The steam pipes don’t prevent effective duct sealing, but they do require materials and methods suited to the heat exposure. Call (844) 685-6342 and we’ll assess your specific chase layout.
Yes, if you control or can coordinate access to the duct runs serving your unit. Leaky shared systems waste energy proportionally, and individual unit sealing of accessible trunk lines and branch connections improves airflow to your space even when full system replacement isn’t practical. We often work with building management and individual owners in Old Town courtyard buildings to prioritize the highest-impact repairs. Call (844) 685-6342 to discuss what’s accessible in your building.
Often yes. River North lofts with dropped ceilings or soffits usually have access panels or removable sections from the original construction. Where that’s not the case, we can sometimes reach flex duct from adjacent mechanical closets, HVAC platforms, or by creating small, strategically placed access openings that are easily patched. We never open a ceiling without showing you exactly why and what we expect to find. Call (844) 685-6342 for a camera inspection that maps your options.
Water-based mastic sealant, applied with a brush or spray and reinforced with fiberglass mesh at stress points. Not tape, not caulk. Pre-war buildings in Near North Side see significant thermal expansion and contraction in metal ductwork, particularly in uninsulated masonry chases. Mastic remains flexible, maintains its bond through temperature cycles, and is rated for the temperature range of residential HVAC. We use professional-grade mastic on every metal joint we seal. Call (844) 685-6342 if you want us to inspect your current sealant condition.
Ready to stop losing heated and cooled air to leaks you can’t see? Call Bellows Air Duct & Vent Co. at (844) 685-6342 for a free estimate on duct repair and sealing in Near North Side. We’ll show you the problem with a camera, quote the work before we start, and stand behind it for 90 days in writing. Ray Castillo built this company on square deals and straight talk. That’s still how we work.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Near North Side and Chicago since 1984.