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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AfterAir Duct Repair in San Marino, CA: What It Costs and What We Find
Air duct repair in San Marino typically runs between $350 and $900 per system when we’re sealing disconnected joints, patching deteriorated duct board, or replacing failed flex connections. Homes here are different from what we see in neighboring San Gabriel or Alhambra, and the pricing reflects that. Most San Marino estates have two or three separate HVAC systems serving different wings, so we quote per system, not per house. Call (980) 447-2498 and we’ll walk you through what your ducts actually need.
We’ve worked on Spanish Colonial Revival homes off Lorain Road and English Cottage-style estates near Lacy Park. Every one of them has taught us the same lesson: San Marino ductwork does not behave like tract-home ductwork.
Why Linden Air Duct Cleaning Is San Marino’s Preferred Air Duct Repair Company
We know San Marino homes from the inside out, which is not a claim every contractor can make honestly. The estate homes here, built mostly between 1920 and 1955, were never designed for central air. When HVAC arrived decades later, installers ran ducts through chimney chases, original balloon-frame cavities, and closed-off servants’ stairwells. Finding those runs, and repairing them without tearing into finished plaster walls, takes experience with this specific housing stock.
Every technician who arrives at your door is background-checked, identity-verified, and photo-badged under the Threshold Standard. You’ll receive your tech’s name and photo before the visit, and they’ll show a photo ID badge at the door. No exceptions. Marcus Veale leads our team, and the standard he set has not changed since we started serving this region in 2004.
Our crews serve San Marino directly. Scheduling and dispatch are coordinated from our Los Angeles office, but the people who show up at your house know the difference between a 1928 Tudor off Orlando Road and a 1980s build near the Huntington Library. That local knowledge matters when a duct run disappears into a finished ceiling and nobody can tell you where it goes.
Ductwork Repair in San Marino
Ductwork repair in San Marino is frequently about reconnecting what time and poor retrofit work have pulled apart. We open up the system, identify where pressure is leaking, and fix it at the source. A disconnected plenum joint hidden above a finished ceiling is not rare here; it is close to expected in homes where the HVAC was punched in during the 1970s or 1980s.
Most ductwork repair jobs in San Marino fall between $350 and $700 per system. That covers the labor to access the damaged section, reseal or replace the failed material, and verify airflow with pressure testing. If your house has three systems, we quote three separate prices. Not one lump sum that hides what each system actually needs.
Sealing and Reconnection in Older Estates
When a plenum joint separates, your system pulls attic air directly into the living space. In San Marino, that attic air often carries wildfire ash and fine particulate from the San Gabriel Valley air basin. We reconnect the joint, seal the surrounding duct board, and test to confirm the system holds negative pressure where it should.
Aging Duct Board and Fiberglass Facing
Original rigid duct board from the 1950s and 1960s degrades. The fiberglass facing sheds particles into your supply ducts, and those particles end up in the rooms where you sleep. We patch or replace failing sections, then document everything with before-and-after photos so you can see the work that happens inside your walls and ceilings.
Duct Replacement in San Marino
Duct replacement in San Marino is the honest answer when repair stops making sense. If a flex run has collapsed, a section of rigid duct board has rotted through, or a retrofit run through an old chimney chase is so kinked that airflow never stood a chance, patching it again is throwing money at a dead system.
Replacement typically runs $700 to $1,800 per system in San Marino. The range is wide because some homes need a single flex run swapped out, while others need entire return plenums rebuilt in an attic that requires crouching through a 30-inch access hatch. We give you a written price before any work begins, and that number does not change when the job gets harder than expected.
When Older Runs Have Failed Completely
We see flex connections in San Marino attics that were never sized correctly in the first place. Decades of heat, dust, and Santa Ana-driven particulate have stiffened them until they crack. We replace those runs with properly sized, sealed ductwork that fits the actual load of the space it serves.
Replacing Ducts Hidden in Chimney Chases
This is the job that separates duct cleaners from duct repair specialists. If original installers routed your return through the chimney chase, accessing it means working through tight, finished spaces without damaging original plaster. We can usually reach these runs with camera inspection and specialized tools, but replacement sometimes requires a carefully planned access point. We’ll tell you before we cut anything.
Trusted Brands We Service in San Marino
Our repair work uses professional-grade equipment from Rotobrush and Nikro, and we regularly service systems that incorporate products from Aprilaire, Abatement Technologies, and Guardsman. If you have an Aprilaire filtration system tied into your ductwork, we know how to work around it without compromising the filtration. If Abatement Technologies products are installed, we understand the integration points. We stock common repair materials for the brands we see most often in San Marino homes, which keeps turnaround faster than waiting on parts from a distributor.
Common Air Duct Repair Problems We See in San Marino Homes
- Disconnected plenum joints in finished ceilings: 1970s and 1980s retrofits often left joints unsealed or improperly fastened. They separate over time, and the system silently pulls attic dust into your home.
- Deteriorating rigid duct board in oversized attics: San Marino attics get brutally hot in summer. That heat accelerates the breakdown of fiberglass facing, which sheds into supply ducts for years before anyone notices.
- Wildfire ash accumulation in unsealed penetrations: Smoke from the Angeles National Forest funnels into the San Gabriel Valley each fire season. Leaky ducts pull that ash directly into the air you breathe indoors.
- Kinked or collapsed flex runs in retrofitted wings: When HVAC was added to a 1930s estate, flex duct sometimes got jammed through spaces too tight for it. The run fails early and never delivers proper airflow.
Pricing for Air Duct Repair in San Marino, CA
You should know what to expect before you pick up the phone. Ductwork repair in San Marino generally runs $350 to $700 per system. Duct replacement runs $700 to $1,800 per system, depending on access difficulty and how much material needs to go. A home with three systems gets three line items. We do not bundle everything into one vague number.
What moves the price: how many systems your home has, whether the damaged section is reachable through a standard attic access or hidden above a finished ceiling, and whether asbestos-era duct board requires specialized handling. We explain all of this before you commit. Every job receives a written price before work begins, and every repair carries a written guarantee. If a covered repair fails within 365 days, we return at no charge. Call (980) 447-2498 for a free estimate with no obligation.
We Also Serve Cities Near San Marino
Our Air Duct Repair team works throughout the San Gabriel Valley. We regularly serve homeowners in San Gabriel, Alhambra, Pasadena, and South Pasadena. Wherever you are near San Marino, you get the same written pricing and the same verified technicians.
Serving San Marino, CA - Our Local Coverage Area
We’re based in the San Marino 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 Marino
Yes. We quote per system, not per house. That means a home with three systems gets three separate written prices. This matters in San Marino because estate homes here often have independent HVAC serving different wings, and each system typically has its own damage profile. Charging per system means you pay for the work each system actually needs, not an averaged guess. Call (980) 447-2498 and we’ll schedule a walkthrough to price each system individually.
Because the HVAC was retrofitted decades after construction, usually in the 1970s and 1980s, and the original runs were forced through spaces never meant for ductwork. Chimney chases, balloon-frame cavities, and closed-off stairwells made for compromised routing from day one. Joints that were never properly sealed fail over time, and because they’re hidden behind finished ceilings, they go undetected for years. We find them with camera inspection and pressure testing.
In most cases, yes. We use camera inspection to map the run and specialized agitation tools to work through tight access points. Some chases require a carefully planned access opening, but we show you exactly where and why before making any cut. A homeowner near Huntington Drive called us about ash-smelling air during fire season. Camera inspection found a disconnected plenum joint above the finished ceiling in the original chimney chase – a classic 1970s retrofit shortcut. We reconnected the joint, sealed the surrounding rigid duct board, and restored proper negative pressure across all three systems in the house.
Wildfire smoke from the Angeles National Forest funnels directly into the San Gabriel Valley air basin, and SCAQMD consistently flags this zone for high PM2.5 accumulation. If your ducts have unsealed penetrations, that smoke is pulled into the system and distributed through your registers. Over time, ash deposits build up in plenums and flex runs, reducing airflow and recirculating particulate. Repairing leaks is the first step. After that, we can discuss filtration upgrades if your system would benefit.
You should receive before-and-after photos of every repair, a written description of what was found, and a written guarantee covering the work for 365 days. We document every job this way as a standing policy, not a courtesy. If a covered repair fails within the year, we return at no charge. That guarantee is in writing on every air duct repair job we do in San Marino. Call (980) 447-2498 to get started with a free estimate.
Written by Marcus Veale, Owner at Linden Air Duct Cleaning, serving San Marino since 2004.