Fast, Reliable Duct Repair & Sealing Across Van Nuys
Duct repair and sealing in Van Nuys typically costs $280-$780 for most residential jobs, with same-day service available throughout the 91408, 91409, 91410, and 91411 ZIP codes. Our Duct Repair & Sealing team knows the Van Nuys housing stock inside out - we’ve been driving to homes near Van Nuys Airport, along Victory Boulevard, and through the Valerio Street neighborhood since 1984. Call (855) 401-6006 and you’ll reach a live person, not a recording. We’ll give you an honest price before we start, and we back every job with our 90-Day Done Right Promise in writing.
Why Bellows Air Duct & Vent Co. of California Is Van Nuys’s Preferred Duct Repair & Sealing Company
We’ve worked on duct systems in Van Nuys for more than four decades. That matters here because this city’s homes are different - the post-WWII tract houses with original sheet-metal ductwork, the 1970s builds with crumbling fiberglass duct board, the properties tucked under KVNY’s flight paths where fine particulates work their way into every joint gap. We know what to look for before we open the attic hatch.
Our technicians are background-checked, uniformed, and carry the equipment to finish most Van Nuys repairs in a single visit. Calls to our office are answered by a live person 24 hours a day - not an app, not a callback queue. We’ve built our reputation on showing up when we say we will and charging the price we quoted on the phone. No bait coupons, no price changes at the door.
Our 90-Day Done Right Promise applies to every Van Nuys job: if the work isn’t right, we return at no charge with no paperwork required. That’s been our standard since Roger Castañeda founded Bellows in 1984, and it’s why homeowners in this part of the Valley call us back when something else needs attention.
Our Duct Repair & Sealing Services in Van Nuys
Duct Sealing
Sealing is often the right first move for Van Nuys homes with aging metal duct systems. Original sheet-metal ducts in the attics of 1950s and 1960s tracts along streets like Valerio and Saticoy develop gaping joints where sections pull apart after decades of thermal expansion. Those gaps don’t just leak conditioned air - they pull in whatever’s circulating in your attic and the Valley’s trapped smog. We seal with mastic compound and reinforced mesh, not duct tape, because tape fails in Van Nuys’s attic heat within a year or two. A typical sealing job for a 1,200-square-foot Van Nuys home runs $280-$450.
Flex Duct Repair
Flex duct became common in Van Nuys additions and retrofits from the 1980s onward, and we’ve replaced miles of the stuff that has collapsed, torn, or disconnected at the collar. The Valley’s extreme temperature swings - 105°F attic heat in summer, near-freezing winter nights - harden the plastic liner over time. We repair where possible and replace where the damage is too extensive, using insulated flex rated for the temperature extremes this inland bowl delivers. Most flex repairs in Van Nuys fall between $180-$340 per run.
Metal Duct Repair
This is where our Van Nuys experience pays off most. Original galvanized steel ductwork in pre-1970 homes corrodes from the inside out when high-efficiency furnaces produce condensation that old systems were never designed to handle. We’ve cut out rusted sections near Sepulveda and Victory, fabricated replacement pieces on-site, and sealed them with mastic for a permanent fix. Metal duct repair in Van Nuys typically runs $320-$580 depending on accessibility and the extent of corrosion. When the system is too far gone, we’ll tell you straight and quote replacement rather than throw good money at failing metal.
Duct Insulation
Uninsulated or degraded duct insulation is a hidden energy drain in Van Nuys. The Valley’s summer heat turns unconditioned attics into ovens, and every foot of exposed metal duct radiates cooling dollars into the rafters. We install formaldehyde-free fiberglass wrap or foil-faced bubble insulation, depending on your system and budget. Proper insulation can drop cooling costs 20-30% in Van Nuys’s climate, where AC runs eight or nine months a year. Expect $380-$650 for a typical attic insulation job on an existing duct system.
What happens when you call
- 1
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 Van Nuys
We stock parts and service components from Honeywell, Aprilaire, and Nikro - the brands that serious HVAC contractors have relied on for decades. That means faster turnaround for Van Nuys homeowners, not a two-week wait for a specialty order. If your system includes a Honeywell electronic air cleaner or an Aprilaire media filter cabinet, we can assess, repair, or integrate during your duct sealing or repair work. We don’t swap in generic substitutes to save a few dollars. The right part, installed right, lasts longer - especially in Van Nuys’s punishing attic conditions.
Common Duct Repair & Sealing Problems We See in Van Nuys Homes
- Joint gaps in original sheet-metal systems. The post-WWII tract homes that dominate Van Nuys were built with galvanized steel ducts joined by simple S-cleats or drive clips. After 60-70 years of expansion and contraction, those joints gape open in unconditioned attics, sucking in dust, Valley smog, and - for homes near KVNY - fine particulates from constant aircraft exhaust.
- Fiberglass duct board delamination. 1970s-era Van Nuys builds often used fiberglass duct board for its insulation value. That fiberglass breaks down, sheds particles into the airstream, and creates a breeding ground for microbial growth in the Valley’s humid heat. We usually recommend full replacement rather than repair once delamination begins.
- Condensation damage from high-efficiency furnace upgrades. Van Nuys homeowners who’ve swapped in 90%+ AFUE furnaces often find their old uninsulated metal ducts sweating and rusting. The cooler exhaust temperatures produce condensation that 1950s ductwork was never engineered to handle, leading to structural failure and air quality issues.
- Return-air plenum fouling near airport flight paths. Homes in the blocks east and north of Van Nuys Airport’s runway - roughly between Vanowen and Victory, west of Sepulveda - show noticeably heavier gray-black particulate buildup in return plenums. That pattern, which we document with our before-and-after camera inspection, comes from KVNY’s high-volume prop and turbine traffic depositing exhaust fines that standard filters can’t catch.
Pricing for Duct Repair & Sealing in Van Nuys, CA
| Service | Typical Range in Van Nuys |
|---|---|
| Duct sealing (mastic, full system) | $280 - $450 |
| Flex duct repair (per run) | $180 - $340 |
| Metal duct repair (section replacement) | $320 - $580 |
| Duct insulation (attic system) | $380 - $650 |
| Air leak repair (return plenum, etc.) | $220 - $420 |
What drives cost up or down? Accessibility is the big one - a duct system buried under blown-in insulation in a low Van Nuys attic takes longer to reach than one in a walk-up space. The extent of corrosion or damage matters too; a single bad joint is quick, while a system-wide failure means more labor and material. We inspect with a camera before we quote, so you see what we see and the price we give is the price you pay. No bait, no switch, no surprises on the bill.
Standing offers for Van Nuys homeowners: $50 off any repair over $250, free second opinion on any written estimate, $89 seasonal tune-up, and a permanent 5% senior and veteran discount. Call (855) 401-6006 for your exact quote - estimates are free.
We Also Serve Cities Near Van Nuys
Our service area extends to Van Nuys and the surrounding Valley communities - Valley Glen to the east, Sherman Oaks and Valley Village to the south, and Encino to the west. Same standards, same live-answer phone line, same 90-Day Done Right Promise wherever we work.
Serving Van Nuys, CA - Our Local Coverage Area
We’re based in the Van Nuys 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 Van Nuys
Yes, if the metal is structurally sound. We camera-inspect first to check for rust-through, and if the steel is intact, we seal gaps with mastic and reinforced mesh for a permanent fix. Call (855) 401-6006 to schedule an inspection - estimates are free, and we’ll tell you straight if replacement makes more sense.
The constant piston- and jet-engine exhaust from KVNY deposits fine particulates that infiltrate homes through joint gaps and filter bypasses, loading return plenums with gray-black fouling we don’t see in homes just two miles away. Sealing those gaps and upgrading filtration is the fix we recommend for airport-adjacent properties.
Very common - many 1980s and 1990s additions and garage conversions used flex duct that has now hardened or collapsed from Valley temperature extremes. We repair where the damage is localized and replace full runs when the liner has degraded, typically finishing in one visit.
Sealing closes air leaks at joints and connections; insulation wraps the duct to prevent heat gain from the attic. In Van Nuys’s climate, you often need both - sealing stops contamination and air loss, while insulation protects against the 105°F attic temperatures that force your AC to work harder. We assess which your system needs during our camera inspection.
Yes. We work on Honeywell electronic air cleaners and can assess cell condition, check power supply, and integrate service with your duct repair or sealing. If the unit is beyond practical repair, we’ll explain your replacement options without pressure.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving Van Nuys since 1984.