Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Fast, Reliable Air Duct Cleaning Across San Mateo
Air duct cleaning in San Mateo typically runs $450 – $900 for a full system clean of a mid-century ranch or two-story home, and the work usually takes one visit to complete. The price reflects the square footage, the number of returns, and whether the ductwork is original 1940s – 60s single-wall metal or retrofitted flex. If you’re in 94402, 94401, 94404, or 94497 and the registers smell musty when the system kicks on, call (833) 620-5944 for a flat price before we ever roll a van.
We work the whole San Mateo grid, from the fog-belt flats off North El Camino up through the hillside homes above 92. This is a marine-layer city. That changes what gets into your ducts and what grows inside them.
Why Everclear Air Duct Cleaning Is San Mateo’s Preferred Air Duct Cleaning Company
Most San Mateo homes we service were built between 1940 and 1970, and the ductwork tells the story. Original galvanized sheet metal, single-wall returns, flex retrofits done decades later, and registers that have been painted over four times since the Johnson administration. That’s not a problem you solve with a shop vac and a $79 coupon. It’s a job for equipment that can capture what’s actually in there, not just stir it around.
Bruce Lowry built Everclear Air to be equipment-serious from day one. That means a Rotobrush rotary brush system inside the ducts, Nikro HEPA-rated negative air machines pulling the airborne debris out of the house as we work, and Abatement Technologies containment where the job calls for it. The same gear commercial and remediation crews run. Brought to a four-bedroom ranch in 94402. San Mateo homeowners keep calling us because the results are verifiable. You see the camera footage before and after. You see what came out of your own returns.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Ductwork Cleaning in San Mateo
Ductwork cleaning in San Mateo is a different animal than it is in San Jose or Pleasanton, and the reason is the marine layer. When cool, damp air pushes through the San Bruno Gap and sits over the Peninsula for days on end, the inside of your ducts stays humid even when the system isn’t running. Dust that would stay dry and inert inland becomes damp, compacted, and biologically active here. That’s why a proper clean in San Mateo means source removal with agitation and HEPA capture, not a brush on a drill and a pat on the register.
Full System Cleaning For Coastal Homes
We clean the supply side, the return side, the trunk lines, and the branch runs. In older San Mateo homes the return side is usually single-wall metal laid under the slab or through a crawlspace, and it’s almost always worse than the supply. Negative pressure plus agitation pulls decades of impacted material out without redistributing it into your living room.
Supply Duct And Register Cleaning
Supply ducts in fog-belt homes often show mildew at the register boots because cool air from the vents condenses against warm room air. We inspect each boot, clean the registers themselves, and document everything. If a register has surface mildew, you’ll see the after photo, not take our word for it.
Air Duct Inspection in San Mateo
Air duct inspection in San Mateo is where we start, especially on homes built before 1970. A camera inspection through the return and supply lines shows you what’s actually inside: dust compaction, rust, standing condensation in low spots, flex duct that’s collapsed or disconnected, and mildew where the marine-layer moisture has been sitting. Without the camera, you’re guessing. Homeowners in 94401 and 94402 often assume their ducts are just dusty. The footage frequently shows something else.
Video Inspection Before Work Begins
We run a high-resolution camera from the register side and the plenum side so there’s no hiding place. The video gets reviewed with you before any cleaning starts. If the ducts are clean and you don’t need the work, we’ll tell you that. If there’s a dam failure or a disconnected return, you’ll see it on screen.
Post-Cleaning Verification
After the clean, we run the camera again. The before-and-after footage belongs to you. That’s the Everclear standard. No fog, no mystery, no “trust us, it’s cleaner.” You see the bare metal and the removed debris.
Trusted Brands We Service in San Mateo
We stock filters, media cabinets, and replacement components for Honeywell and Aprilaire systems on the truck, so if your San Mateo home runs one of those and it’s due for a filter media change, we handle it during the same visit. We build and repair duct transitions, boots, and collars for the brands most common across the Peninsula’s housing stock. One call instead of two contractors, and no waiting on a part shipped from Kansas.
Common Air Duct Cleaning Problems We See in San Mateo Homes
- Condensation pooling in single-wall metal ducts. In the fog-belt flats near the Bay, especially in 94401 and 94402, we regularly find water collecting in low spots of the return runs. That standing moisture is what lets mildew take hold at the bottom of the duct. A dry-dust-only cleaning won’t touch it.
- Mildew at the register boots. Coastal air and daily temperature swings mean condensation forms where cool duct air meets warmer indoor air. Register boots in bathrooms and kitchens are the worst. Cleaning removes the growth; leaving the boot wet just invites it back in a month.
- Collapsed or disconnected flex-duct retrofits. Half the homes in 94403 and 94404 had flex retrofits added in the 1980s and 90s. Poorly supported flex sags, kinks, and pulls apart at the collar. You lose airflow, and the gap pulls crawlspace air into the system. A camera inspection finds these in minutes.
- Decades of impacted dust in original galvanized returns. 1940s and 50s ranch houses on the Peninsula ran gravity furnaces and single-wall returns for half a century before any air conditioning existed. That dust column is compacted, often damp, and heavier than anything a brush-and-vacuum crew can pull out. Full-system agitation with proper negative pressure gets it.
See the difference
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After
Before
After
Before
AfterPricing for Air Duct Cleaning in San Mateo, CA
A full-system cleaning in San Mateo generally lands between $450 and $900 for a typical single-family home. Smaller condos or townhouses in 94404 run on the lower end, around $350 – $500, while larger two-story homes with dual zones and multiple returns run $750 – $1100. What moves the number: the number of returns, the duct material and age, crawlspace access, and whether we’re cleaning both supply and return. We quote one flat price per system before work begins. No per-vent upcharges, no bait-and-switch once the van is in the driveway. Call (833) 620-5944 and we’ll give you a number you can hold us to.
We Also Serve Cities Near San Mateo
Everclear Air handles Air Duct Cleaning work in the surrounding Peninsula towns too. We regularly cover Foster City, Burlingame, San Bruno, and South San Francisco, and our San Mateo customers know we’re close by when the fog settles in and the registers start to smell.
Serving San Mateo, CA – Our Local Coverage Area
We’re based in the San Mateo 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 San Mateo
Because San Mateo sits in the Peninsula marine-layer belt. Fog pushes through the San Bruno Gap, the air stays damp for days, and the inside of your ducts never fully dries out. Inland cities like San Jose and Pleasanton get hot, dry summers that bake duct interiors. San Mateo gets a cool, humid blanket. Add 60-year-old single-wall galvanized metal, which condenses moisture easily, and you’ve created an environment where mildew grows on the duct walls and the smell routes through the registers every time the fan runs. Call (833) 620-5944 and we’ll camera-inspect the system instead of guessing.
Almost never, as a standalone. Fogging a duct with an antimicrobial mist masks musty smells for a few weeks but doesn’t remove the mildew colony or the condensation feeding it. If the source of the moisture isn’t addressed, the smell returns. In San Mateo’s damp climate, real source removal means agitation, HEPA capture, and then fixing the condensation issue at the boot or the air handler. That might include an Aprilaire dehumidifier on the system. A fog alone is money spent on a temporary mask.
In our experience with mid-century Peninsula housing, the camera typically shows one or more of the following: standing water in low spots of the return, compacted dust packed along the bottom of the single-wall metal, mildew at the register boots, disconnected flex-duct collars, or rust-through in the trunk line. Some homes, especially those with recent upgrades, show clean ducts and just need a maintenance clean. The point of the inspection is that you’ll know which condition you have before paying for work. Call (833) 620-5944 to schedule one.
Actually, it can make the dirt wetter and stickier, which is worse. In dry inland climates, low usage means dust sits loose and can be pushed through by a basic cleaning. In San Mateo, low usage combined with marine-layer humidity means that dust absorbs moisture, compacts, and becomes a biological medium. The same particulate load that would be a nuisance in Dublin becomes a mildew substrate in 94401. Less runtime doesn’t mean cleaner ducts. It usually means damp, settled material that needs actual source removal.
By running proper negative air from the start. We connect Nikro HEPA-rated negative air machines to the system before agitation begins, so the containment zone is under continuous negative pressure. Air moves only into the containment and through HEPA filtration, not into the living space. In damp San Mateo systems where mildew is present, this is non-negotiable. A crew that just shoves a brush in without establishing negative pressure is blowing mold spores into your furniture. When we finish, the home’s air is cleaner than when we started, not dustier.
Call Everclear Air Duct Cleaning in San Mateo
If your registers smell like a damp crawlspace or you suspect the ducts haven’t been properly cleaned since the home was built, call (833) 620-5944. We’ll inspect, quote one flat system price, and show you the footage before and after. Bruce Lowry and the Everclear team serve all of San Mateo, from the 94401 and 94402 flats to the hills above 92 and over to 94404 and 94497. Free estimates, no fog-and-go.
Written by Bruce Lowry, Owner at Everclear Air Duct Cleaning, serving San Mateo and the Peninsula since 2017.