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.
Before
After
Before
After
Before
AfterFast, Reliable Air Duct Repair Across Cotati
Air duct repair in Cotati typically runs $300 – $850 for a single failing run and $950 – $2,200 for full supply-and-return duct replacement, depending on how much flex duct has sagged, crushed, or separated. Most repairs are completed in one visit of 3 – 5 hours. If you’re in Cotati and your rooms stay cold in winter or warm in summer even with the system running, there’s a good chance your ductwork has a disconnected or collapsed section. Call (980) 447-2498 and we’ll send a technician who knows exactly what 1960s – 80s Cotati duct systems look like when they start to fail.
Why Linden Air Duct Cleaning Is Cotati’s Preferred Air Duct Repair Company
Our Air Duct Repair team works Cotati homes every week, and the patterns here are consistent. Original flex duct from the 1960s through 1980s sags between joists, separates at the collars, and leaks supply air into crawlspaces and attics instead of the rooms it’s meant to heat. We show you the problem on camera before any work begins, and we quote one flat price per repair job in writing before the first cut is made. Marcus Veale, our owner, set the standard for this approach after years of hearing from homeowners who had been surprised by final invoices elsewhere. When you call, a live person answers 24/7. The tech who arrives at your Cotati door is background-checked, identity-verified, and you receive their name and photo before they show up. They will show a photo ID badge at the door. That’s the Threshold Standard, and it’s in effect on every single visit.
Ductwork Installation in Cotati
Ductwork Installation in Cotati is not a light undertaking, but in homes built during the 1960s – 80s boom after the city’s 1963 incorporation, it’s often the only honest fix. When the original flex duct has sagged enough to restrict airflow, separated at multiple collars, or degraded from decades of Petaluma Gap condensation, patching one section buys time, not a solution. A full ductwork installation in Cotati for a typical 1,400 – 2,000 sq ft single-story tract home runs $2,200 – $4,800, including removal of failed runs, new supply and return duct, sealing at every joint and collar, and balancing. We use insulated hard pipe where the old flex was sagging, because it holds its shape between joists and won’t crush under a carelessly stored box in the crawlspace.
What the Job Involves
We start with a camera inspection of every supply and return run so you can see the condition before a single duct is touched. Old flex comes out, framing penetrations get checked, and new duct goes in with mastic sealing at every connection. The final step is a static pressure check to confirm the system is moving air the way it should.
When Cotati Homeowners Need It
If your home near East Cotati Avenue or the stretch south of Gravenstein Highway still has the original flex duct from when it was built, and you smell something musty when the system runs, it’s time for an honest assessment. The same applies if some rooms never reach the temperature shown on the thermostat. Those are supply runs that have separated or collapsed, and no amount of cleaning repairs a broken duct.
HVAC Duct Installation in Cotati
HVAC Duct Installation in Cotati means installing duct that actually fits the airflow needs of a specific system and a specific house, not just hanging whatever flex is on the truck. Many Cotati homes have furnaces that were oversized or replaced over the years, and the duct was never re-evaluated. We size new duct to the blower’s actual output and the room-by-room heat load, which cuts the hot-cold room split that plagues older tract homes here. A typical HVAC duct installation in Cotati, including new supply plenum connections and return duct, runs $1,400 – $3,600 for a partial re-duct and $2,800 – $5,200 for a complete system. The written estimate states the exact scope before any work starts.
Why Repairs Sometimes Lead to Installation
A crushed flex run feeding a rear bedroom can usually be replaced on its own for a few hundred dollars. But when a camera inspection reveals two or three separated collars, a return trunk pulling crawlspace air, and a supply duct lying on the ground, installing a properly supported run is the repair that actually holds. We will tell you the difference plainly and show you the footage.
System Balancing After Installation
Once new duct is in, we check airflow at each register with an anemometer and adjust dampers so rooms heat and cool evenly. That step gets skipped by plenty of installers, and it’s the difference between a duct job that ends the complaint and one that just moves it to a different room.
Trusted Brands We Service in Cotati
We work on duct systems tied to every major HVAC brand found in Cotati homes, and our techs carry Nikro inspection cameras and HEPA extraction equipment on every truck. When air-quality products are part of the repair, we source from Honeywell, Aprilaire, and Abatement Technologies, depending on what the system needs. Since we stock common duct fittings, collars, mastic, and hard pipe locally for our Cotati calls, most repairs don’t wait on a parts order. If you have an older furnace pushing air through falling-apart flex duct, we can address both the duct and the filtration or humidity control in the same visit.
Common Air Duct Repair Problems We See in Cotati Homes
- Sagging flex duct between joists – Original 1960s – 80s flex duct in Cotati loses its rigidity over time and dips between supports, creating low spots where condensation pools and airflow gets throttled. This is the most common camera-inspection finding in homes along Old Redwood Highway and the neighborhoods off East Cotati Avenue.
- Disconnected collars at the air handler – Vibration and settlement work collars loose, especially in older homes near the SMART train tracks. Supply air pours into the crawlspace or attic, and the rooms farthest from the blower never get comfortable.
- Mold on the low side of horizontal runs – The Petaluma Gap pushes damp marine air into Cotati most summer afternoons. Inside poorly sealed return ducts, that moisture condenses on the inner liner and feeds mold along the bottom of horizontal runs; a dry-inland Sonoma market like Santa Rosa sees this far less often.
- Grayish-black wildfire particulate baked into the duct lining – Smoke from the Tubbs, Kincade, and Glass fires settled into duct systems throughout Cotati. When a disconnected run pulls crawlspace air, that particulate gets re-entrained into the living space, and no ordinary seasonal cleaning removes it.
Pricing for Air Duct Repair in Cotati, CA
A disconnected or crushed flex run repair in Cotati typically runs $300 – $650 per run, with most homes needing one to three runs addressed. Re-securing and resealing a separated return trunk or plenum collar costs $250 – $450. Full supply-and-return duct replacement in an average Cotati tract home runs $2,200 – $4,800, and complete HVAC duct installation with system balancing falls between $2,800 and $5,200. What drives the final number is how much duct has failed, whether it’s accessible from a crawlspace or requires attic work, and whether we are pulling out the old insulation and debris. You get the full price in writing before work starts, always. Call (980) 447-2498 for a free estimate, and we’ll walk you through exactly what your system needs.
Because the Petaluma Gap pushes cool, damp marine air through Cotati on most summer afternoons and the city averages over 30 inches of rain, the original 1960s – 80s flex duct runs in Cotati homes trap condensation that slowly degrades the inner liner and feeds mold along the bottom of horizontal runs. That’s a wet-side failure we don’t see nearly as often in dry-inland Sonoma markets. When we replace a run here, we install hard pipe or properly supported insulated flex with sealed collars so the condensation problem doesn’t simply migrate to the next weak point.
We Also Serve Cities Near Cotati
Our crews work daily across the Sonoma County corridor, including Rohnert Park, Petaluma, Santa Rosa, and Sebastopol. If you live near the Cotati-Rohnert Park line or maintain a rental off Gravenstein Highway, you’re still in our service area. Visit our Air Duct Repair in Cotati page for specifics on how we handle this city’s older housing stock, or call (980) 447-2498 for a straight answer on your duct problem.
Serving Cotati, CA - Our Local Coverage Area
We’re based in the Cotati 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 Cotati
Because most of Cotati’s housing stock was built in the 1960s through 1980s, and the original flex duct in those homes has now been in place for 40 to 60 years. Flex duct sags between joists, crushes under stored items in crawlspaces, and separates at collars. Cleaning a duct that’s disconnected or collapsed does nothing; the repair has to come first. Call (980) 447-2498 and we’ll camera-inspect your system to show you what’s actually failing.
That fine grayish-black particulate is wildfire smoke residue from the Tubbs Fire in 2017, the Kincade Fire in 2019, and the Glass Fire in 2020, when heavy smoke blanketed Cotati for days and residents ran their HVAC systems through evacuation watches. It coats duct interiors and re-entrains into living spaces whenever a disconnected run pulls unfiltered crawlspace air. Removal requires HEPA-vacuuming, not a standard brush-and-blowout cleaning.
Yes, directly. The Petaluma Gap funnels cool, damp marine air from San Pablo Bay into Cotati on most summer afternoons, and that moisture condenses inside poorly sealed or uninsulated ducts. Over years, it degrades the flex duct’s inner liner and creates mold on the bottom of horizontal runs. That’s a wet-side problem dry-inland parts of Sonoma County see far less.
In most cases, yes. A single crushed flex run feeding one or two rooms usually gets replaced on its own for $300 – $650, and a separated collar typically costs $250 – $450 to re-secure and reseal. We only recommend full duct replacement when the camera inspection shows multiple failing runs and widespread leakage; you’ll see the footage and get the written quote for the specific job, not a scare price.
We verify the repair three ways: a before-and-after camera inspection of the repaired runs, a static pressure test to confirm airflow through the system, and a temperature check at each register to confirm the repaired rooms are now receiving supply air. If a covered repair doesn’t hold, our 365-Day Done Right Promise means we return at no charge. That’s in writing on every job.
Written by Marcus Veale, Owner at Linden Air Duct Cleaning, serving Cotati since 2004.