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 Air Duct Repair Across San Martin
Air duct repair in San Martin typically runs between $280 and $750 for common jobs like sealing leaks, patching torn flex runs, and replacing crushed duct sections. Full duct replacement on larger ranch-style homes usually lands between $2,800 and $6,500 depending on how much of the system has failed. We schedule repairs across San Martin every week, and our crews know the difference between a 1970s crawlspace flex run off Llagas Road and a newer attic trunk off Sycamore Avenue. Call (980) 447-2498 for a written quote before any work begins.
Key Takeaways:
- Written price before any work starts, every time, no exceptions.
- Every repair covered by our 365-Day Done Right Promise in writing.
- Background-checked technicians, with name and photo sent to you before arrival.
- Free second visit if a covered repair does not hold.
Why Linden Air Duct Cleaning Is San Martin’s Preferred Air Duct Repair Company
San Martin homeowners live with a specific kind of duct contamination that suburban neighbors in Morgan Hill or Gilroy rarely see. Hay fiber, fine soil, and agricultural dust load return-air intakes on ranchette properties in ways that standard duct cleaning services simply are not set up to address. Our Air Duct Repair team works with professional-grade Rotobrush and Nikro equipment built for heavy particulate removal, not just cosmetic surface cleaning.
Every technician who arrives at a San Martin home is background-checked and identity-verified under the Threshold Standard. You get the tech’s name and photo before the visit, and they show a photo ID badge at the door. When you call, a live person answers, 24 hours a day, seven days a week. No voicemail loops, no callback queues.
We operate as an independently owned and operated location within the Threshold Group family, and we have held to that verified standard since 2004. Marcus Veale leads our crew, and he holds every job to one rule: if the repair is not right, we make it right in writing, for a full 365 days.
Ductwork Repair in San Martin
Ductwork repair in San Martin means something different than it does in a dense suburban tract. Decades-old flex runs in unconditioned crawlspaces and attics tear, collapse, or separate at the seams, pulling agricultural dust and Diablo-wind smoke straight into the supply side before the filter ever sees it. A typical ductwork repair here runs $280 to $650 depending on access, length of the run, and how many joints need resealing.
Sealing Leaks and Open Seams
Open seams are the most common repair we perform in San Martin homes built between the 1960s and 1990s. Additions and DIY modifications left mismatched duct sections that never sealed properly. We locate every leak with a pressure test, then seal them with mastic and foil tape rated for unconditioned spaces.
Crushed and Torn Flex Runs
Rodents and heat cycling in crawlspaces and attics crush flexible duct runs flat. When the duct collapses, airflow drops and the system pulls harder on whatever is nearby, including dust from the crawlspace floor. We replace damaged sections and add proper support straps so the repair holds through San Martin’s hot summers and cool winter mornings.
Duct Replacement in San Martin
Duct replacement in San Martin usually becomes necessary when original 1970s or 1980s flex duct has degraded past the point where patching makes sense. Full or partial replacement typically runs $2,800 to $6,500 on the ranch-style homes that dominate this area. The final number depends on how much of the system is failing, how accessible the crawlspace or attic runs are, and whether the home has an attached or detached system.
Original 1970s Flex Runs
A San Martin home with original flex duct from the 1970s is running on borrowed time. The inner liner breaks down, the insulation sheds, and every seam becomes a dust entry point. Replacing those runs with new insulated flex, properly sized and sealed, restores static pressure and cuts the particulate load reaching the blower motor.
Mismatched Sections from Additions
Many San Martin properties grew over the years, with new rooms added onto homes built in the 1960s through 1990s. The ductwork that came with those additions often does not match the original system’s size or layout. We replace the mismatched sections, match the existing trunk dimensions, and balance the airflow so every room gets the air it was designed to receive.
Trusted Brands We Service in San Martin
We service and repair duct systems connected to equipment from every major HVAC brand, and we keep common repair parts stocked for San Martin jobs so we are not waiting on a warehouse in San Jose. That means faster turnaround when a crushed flex run or leaking plenum has your system running hard. We run professional-grade Rotobrush and Nikro equipment for cleaning and agitation work, and we work with air-quality products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman for filtration and source control on properties with heavy agricultural dust loading.
Common Air Duct Repair Problems We See in San Martin Homes
- Hay fiber matting inside return ducts. On equestrian properties, hay stored near structures and dander from adjacent paddocks migrate into return-air intakes at the roofline or foundation. The fiber compresses inside the duct and lines the interior, choking airflow and often getting misdiagnosed as a blower motor failure.
- Collapsed flex runs in crawlspaces and attics. San Martin’s housing stock skews toward custom and semi-custom ranch homes built from the 1960s through the 1990s. Unconditioned crawlspace and attic runs face decades of heat cycling and rodent pressure, leading to tears and crushed sections that pull dust straight into the supply side.
- Open seams from DIY additions. Properties that were added onto over time often have duct sections that do not match the original layout. The open seams let Diablo-wind wildfire smoke and summer tilling dust bypass the filter entirely, coating the inside of ducts and every register in the house.
- Blower motors pulling hard against blocked returns. When hay fiber and fine soil mat the return side, the blower motor works harder to move the same volume of air. The symptom reads as an equipment problem, but the root cause is source-side contamination that only a camera inspection reveals.
Pricing for Air Duct Repair in San Martin, CA
Ductwork repair in San Martin runs $280 to $650 for common jobs like sealing leaks, replacing a crushed flex section, or repairing a separated joint. Full or partial duct replacement lands between $2,800 and $6,500 depending on how much of the system has failed and whether the runs are in a crawlspace, attic, or detached structure. Every price we give is put in writing before work begins, so there is no surprise invoice at the end. The quote you sign is the price you pay, one flat figure per system. Call (980) 447-2498 for a free estimate, and we will send a technician to inspect the actual condition of your ductwork, not a guess based on square footage alone.
We Also Serve Cities Near San Martin
Our crews handle air duct repair in San Martin and the surrounding communities, including Morgan Hill, Gilroy, Los Gatos, and Campbell. If you live just outside San Martin proper, on a ranchette along Watsonville Road or a newer subdivision near the Santa Cruz Mountains, we can reach you. Call (980) 447-2498 and tell us where you are.
Serving San Martin, CA - Our Local Coverage Area
We’re based in the San Martin 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 Air Duct Repair in San Martin
On a San Martin horse property, we recommend inspecting ductwork every 12 to 18 months, and cleaning or repairing every 2 to 3 years, roughly twice as often as a typical suburban home in Morgan Hill or Gilroy. Hay fiber and fine soil load the system continuously, not seasonally. If you store hay within 50 feet of the house, shorten that interval. Call (980) 447-2498 and we will tell you what your specific setup needs.
Compressed hay fiber lines the interior of the return duct and restricts airflow at the source. The blower motor pulls harder to compensate, which shortens its lifespan and raises energy use. The fiber also holds moisture, creating conditions where biological growth can take hold. We have seen this pattern repeatedly on San Martin ranchette properties, and the fix is source removal, not just filter changes.
Sometimes both. Diablo wind events push wildfire smoke from the Santa Cruz Mountains and the Diablo Range directly across San Martin, and the smoke deposits combustion particulates deep into HVAC systems. If the ducts are sealed properly, a professional cleaning restores them. If open seams or crushed runs have let that smoke bypass the filter and settle into the supply side, you need repair work too. A camera inspection tells us which applies to your system.
Yes. Many San Martin properties include detached shops, barns, or converted outbuildings with their own duct runs. We inspect and repair those systems the same way we handle the main house, including runs in unconditioned spaces that have been exposed to the same agricultural dust load. Tell us about every structure on the parcel when you call, and we will include them all in the written quote.
If the flex duct is original from the 1970s, replacement is almost always the better call. The inner liner will have degraded, the insulation will be shedding, and every seam is a dust entry point. Patching one section leaves the rest of the run failing. Replacement costs more up front, but it ends the cycle of recurring repairs, and the price is put in writing before we start. Call (980) 447-2498 for a straight answer on what your crawlspace actually needs.
Written by Marcus Veale, Owner at Linden Air Duct Cleaning, serving San Martin since 2004.