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
AfterAir Duct Cleaning in Foster City, CA
Dryer vent cleaning in Foster City is not a once-a-decade chore. Homes here, built mostly between the mid-1960s and mid-1980s on reclaimed bay mud and ringed by man-made lagoons, hold humidity in their walls and vent runs long after the fog burns off. That persistent moisture turns lint from a nuisance into a dense, damp plug inside the vent pipe. We see it on lagoon-fronting streets off Edgewater Boulevard and in the quiet cul-de-sacs behind Sea Cloud Park. If your dryer has been taking longer to finish a load, call us at (806) 606-6902 and we’ll put a camera in the vent to show you exactly what’s slowing it down.
Why Foster City Homes Are Different
Foster City was built on tidal mudflats starting in the 1960s, and the same lagoons that make the city pleasant to live in also keep the air wetter than it is a few miles east in San Mateo or Belmont. That elevated ambient humidity works its way into return-air ducts, exhaust vents, and dryer runs. Fiberglass-lined sheet-metal ducts from the original construction era are now 40 to 55 years old, and in many Foster City homes the lining has begun to shed or hold moisture. We regularly find a directional contamination pattern in lagoon-facing houses: return-air ducts on the bay side of the home show heavier mold staining than the street-facing side of the same system. That is not a guess. It is what the camera shows before we touch anything.
Foster City’s housing stock was built in a compressed window, which means thousands of homes share the same duct design, the same flex-run materials, and the same failure points. Early flex-duct runs from that period sag, tear, and collect debris at the bends. Homeowners here also deal with HOA expectations for exterior vent caps and noise, which shapes how repairs are done. None of this makes the work exotic. It makes it predictable, and predictability is what lets us write a price before the work starts.
Our Main Foster City Services
Most Foster City homeowners call us first about two things: the air moving through the ducts and the HVAC equipment that moves it. Both are tied to the same bay-air humidity and the same aging duct systems. Here is how each job works in Foster City.
Air Duct Cleaning in Foster City
Air duct cleaning in Foster City means removing the debris that decades of bay air leave behind: dust, deteriorated fiberglass lining, and biological growth that thrives in the lagoon microclimate. We photograph the inside of every duct run before and after, so you see the difference rather than take our word for it. The full scope of this service, including pricing and what we find in Foster City homes, is on the Air Duct Cleaning in Foster City page.
HVAC Cleaning in Foster City
HVAC cleaning in Foster City addresses the blower, coil, and plenum, the components that get coated with the same airborne debris that settles in the ducts. On lagoon-side homes, the coil often carries a visible biofilm layer that duct cleaning alone will not remove. We include the coil and blower in a written scope before work begins. Details and Foster City pricing are on the HVAC Cleaning in Foster City page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterDryer Vent Cleaning in Foster City
Dryer vent cleaning in Foster City solves a problem that the city’s climate makes worse than almost anywhere else on the Peninsula. Lint collects in every dryer vent, but in Foster City the constant humidity from the lagoons compacts that lint into a damp mat that clings to the pipe walls. A vent that would stay passable in Redwood City can become nearly closed here within the same number of loads. Dryer Vent Cleaning in Foster City homes from the original mid-century construction often means clearing runs that have never been opened, and in those runs we typically find dense, moisture-bound lint plugs at the first elbow.
Dryer Vent Inspection
Signs you need it
Clothes take longer than one full cycle to dry, the dryer exterior gets hot, or you notice a musty smell near the laundry area.
What it costs in Foster City
A camera inspection of the dryer vent run typically costs $90 to $180 in Foster City, and the photos become part of your job record.
How we do it
We run a camera through the full vent run from the dryer to the exterior cap, photograph each elbow and termination, and show you what the lens finds before we recommend anything.
Vent Cleaning
Signs you need it
The dryer runs longer per load, the outside vent flap barely moves during a cycle, or the laundry room feels humid.
What it costs in Foster City
Full dryer vent cleaning in Foster City typically costs $130 to $250, depending on run length and how packed the pipe is.
How we do it
We use a rotary brush and negative-pressure extraction at the vent termination to pull the loosened lint out the exterior side, not push it back into the house.
Lint Removal
Signs you need it
The dryer trips its thermal overload, or you see lint falling from the exterior vent cap when the dryer runs.
What it costs in Foster City
Standalone lint removal for a heavily clogged Foster City vent typically costs $100 to $200.
How we do it
We open the vent at the cleanout point and use a vacuum-assisted brush to remove the accumulated lint, then re-secure the joint.
Bird Guard Installation
Signs you need it
You hear birds or rustling from the dryer vent area, or the exterior cap is missing or broken, common on lagoon-side Foster City homes.
What it costs in Foster City
Installing a bird guard and replacing a damaged vent cap in Foster City typically costs $90 to $170.
How we do it
We remove the old cap, clean the termination point, and mount a screened guard that keeps birds and debris out while allowing proper airflow.
What Dryer Vent Cleaning Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Camera inspection | $90 - $180 |
| Full vent cleaning | $130 - $250 |
| Bird guard + cap replacement | $90 - $170 |
Why are Foster City dryer vents worse than other Peninsula cities?
Foster City’s lagoons and reclaimed bay land keep relative humidity high year-round, and that moisture binds lint into a dense plug much faster than in drier nearby cities like San Mateo or Belmont. Call (806) 606-6902 for a camera look.
Can you clean my dryer vent if it runs through the roof?
Yes. Roof-terminating vents are common in Foster City’s original two-story designs. We clean them with the same rotary brush method and photograph the entire run before and after. Call (806) 606-6902 for a written price.
Duct Repair & Sealing in Foster City
Duct repair and sealing in Foster City addresses what happens when 50-year-old duct materials meet decades of humid bay air. Fiberglass-lined sheet metal and early flex duct from the original construction era crack, sag, and separate at the seams. That lets air you paid to condition pour into the crawl space or attic instead of the rooms. Duct Repair & Sealing in Foster City homes often becomes the difference between a comfortable house and one that runs the HVAC constantly while rooms stay uneven.
Duct Sealing
Signs you need it
Some rooms never reach the thermostat temperature, or your utility bills stay high even when the HVAC is not running hard.
What it costs in Foster City
Sealing accessible duct seams and small leaks in Foster City typically costs $175 to $350, depending on how many joints are accessible.
How we do it
We locate the leaks with a visual inspection and your system’s airflow, then seal them with mastic or foil tape rated for HVAC use.
Flex Duct Repair
Signs you need it
You notice one room consistently warmer or cooler than the rest, or you see a crushed or torn flex run in the attic or crawl space.
What it costs in Foster City
Repairing a torn or crushed flex duct section in Foster City typically costs $200 to $450 per section.
How we do it
We cut out the damaged flex section, fit a new segment with proper hangers, and seal both connections with code-compliant materials.
Metal Duct Repair
Signs you need it
The original sheet-metal duct is rusted, has separated at a seam, or shows visible damage in the garage or crawl space.
What it costs in Foster City
Patching a rusted or separated metal duct section in Foster City typically costs $250 to $500 per section.
How we do it
We clean the damaged metal, cut it back to solid material, and fit a replacement section sealed at both joints.
What Duct Repair & Sealing Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Sealing accessible seams | $175 - $350 |
| Flex duct section repair | $200 - $450 |
| Metal duct section repair | $250 - $500 |
How do I know my ducts are actually leaking?
The signs are uneven room temperatures, high energy bills, and visible damage to flex runs in the attic or crawl space. We photograph every seam we seal and show you the record. Call (806) 606-6902 for a written price.
Will sealing my ducts affect my Foster City HOA compliance?
No. All work is done inside your home’s HVAC system, not on the exterior, so there are no HOA-facing changes. We quote the full job in writing before starting. Call (806) 606-6902.
Air Quality & Sanitizing in Foster City
Air quality and sanitizing in Foster City fights the biological layer that the lagoon microclimate deposits inside ductwork. Mold, mildew, and bacteria grow faster in a home where the outside air is humid more days than not. That means the air moving through your ducts can carry spores and odors into every room. Air Quality & Sanitizing in Foster City homes often focuses on the return-air side, where we find the heaviest growth on the bay-facing side of the house.
Mold Treatment
Signs you need it
You smell a persistent musty odor from the vents, or you see dark staining inside duct runs or at registers.
What it costs in Foster City
Mold treatment for duct interiors in Foster City typically costs $500 to $1,200, depending on the square footage of affected material.
How we do it
We photograph the affected area, apply an EPA-registered antimicrobial treatment to the interior surfaces, and re-photograph to document the result.
Odor Removal
Signs you need it
Pet odors, cooking smells, or a general stale smell return quickly after the HVAC runs.
What it costs in Foster City
Whole-system odor removal in Foster City typically costs $400 to $900.
How we do it
We clean the duct surfaces, replace the filtration media, and apply a neutralizing treatment designed for occupied homes.
UV Light Installation
Signs you need it
You want to stop microbial growth on the coil and in the plenum year-round, especially given Foster City’s humidity.
What it costs in Foster City
UV light installation typically costs $300 to $800 in Foster City, depending on the unit, with Honeywell and Aprilaire units in our stock.
How we do it
We mount the UV lamp inside the supply plenum or above the coil, wire it to the HVAC control board, and verify operation before we leave.
What Air Quality & Sanitizing Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Mold treatment for duct interiors | $500 - $1,200 |
| Whole-system odor removal | $400 - $900 |
| UV light installation | $300 - $800 |
Is the mold treatment safe for my family and pets?
We use EPA-registered antimicrobial products labeled for use in occupied homes. We review the product sheet with you before we apply anything, and we document the application. Call (806) 606-6902 to discuss your home.
How soon can I expect to notice a difference in air quality?
Most Foster City homeowners notice the change within 48 hours, once the system has circulated treated air through the ducts a few times. We photograph the treated surfaces so you can see the before and after. Call (806) 606-6902 for a written price.
Brands We Service in Foster City
Our Foster City crews stock parts and filters for Honeywell and Aprilaire systems, and we service Abatement Technologies equipment used in more involved sanitizing work. Our brands page lists the full equipment roster, including the Rotobrush and Nikro machines we bring to Foster City jobs. Most common parts are on the truck, which keeps most Foster City service calls to a single visit.
Pricing for Air Duct Cleaning in Foster City, CA
| Service | Typical range in Foster City |
|---|---|
| Dryer vent camera inspection | $90 - $180 |
| Full dryer vent cleaning | $130 - $250 |
| Bird guard + cap replacement | $90 - $170 |
| Duct seam sealing | $175 - $350 |
| Flex duct section repair | $200 - $450 |
| Metal duct section repair | $250 - $500 |
| Mold treatment for duct interiors | $500 - $1,200 |
| Whole-system odor removal | $400 - $900 |
| UV light installation | $300 - $800 |
Prices in Foster City are shaped by the age of the duct system and how much of the home is accessible. A lagoon-fronting house with original 1970s flex runs and a long roof-terminating dryer vent will typically land at the higher end of these ranges. Whatever the number is, you get it in writing before any work begins, under Haven Standard Clause 1.
Neighborhoods We Serve in Foster City
We work throughout Foster City, from the lagoon-fronting streets near Edgewater Boulevard to the neighborhoods south of Highway 92, and everywhere in between.
- Edgewater
- Bay Vista
- Sea Colony
- Waterfront
- Central Foster City
Most Foster City appointments are completed in a single visit. We schedule by neighborhood area, so your wait depends more on where your street falls in the week’s route than on any backlog.
Service Area - Cities Near Foster City
CleanRun Air Duct Cleaning serves Foster City and surrounding Bay Area communities. If you’re looking for air duct work in a nearby city, see our pages for San Francisco, CA, San Jose, CA, San Diego, CA, or Los Angeles, CA. We coordinate scheduling from our Bay Area office, and Foster City crews work locally.
Serving Foster City, CA - Our Local Coverage Area
We’re based in the Foster City 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 Cleaning in Foster City
Most Foster City homes take between 3 and 6 hours, depending on the number of duct runs, the age of the system, and whether the crawl space or attic is easily accessible. We photograph every run before and after, and that documentation adds some time to the job. You get a written price before we start.
No. Air duct cleaning, dryer vent cleaning, and duct sealing happen inside your home or in your private mechanical space. Foster City HOAs do not require prior approval for this work. The only exterior component we touch is the dryer vent cap, which is standard maintenance.
We serve the entire city, from the original lagoon-side homes to the newer construction near the Bay. Our dispatch is coordinated from the brand’s San Francisco Bay Area office, and Foster City jobs are handled by crews scheduled locally. Nobody on our Foster City route is a subcontractor.
If your ducts have never been documented, or your dryer has been running longer than it should, call CleanRun Air Duct Cleaning at (806) 606-6902 for a free estimate. We will put the price in writing before any panel comes off, and we will show you the before and after photos before we leave.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Foster City Customers Say
"Flat price agreed up front, no per-vent add-ons at the end. That was the whole reason I did not call the coupon company."
- Suzanne B."The dryer vent was almost completely blocked with lint. They showed me the photograph and I understood immediately why the dryer had been running twice."
- Lucia M."They found a disconnected duct in the crawl space that had been dumping conditioned air under the house for years. Photographed it, quoted the repair, fixed it."
- Devon A.