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.
Fast, Reliable Air Duct Cleaning Across Belmont
Air duct cleaning in Belmont, CA typically costs $350-$650 for a whole-home system and focuses heavily on moisture-driven contamination rather than ordinary dust. Most Belmont homes need attention to crawlspace ductwork and sealing issues caused by the Peninsula’s persistent marine layer.
We serve Belmont from our San Francisco Bay Area dispatch office, with crews covering the full city from the flat neighborhoods near Ralston Avenue up through the winding streets of the Belmont Hills. Whether you’re in a 1960s ranch near Homeview or a hillside split-level off Alameda de las Pulgas, we’ll give you a written price before any work starts and leave a photo of the clean-up before we go. Call (323) 918-4345 for a free estimate.
Belmont’s coastal fog belt creates a unique set of duct problems that inland contractors often miss. We’re familiar with the original sheet-metal and early fiberglass duct board common in post-war homes here, and we know how to handle the moisture damage that Belmont’s humidity causes year after year.
Why Morton’s Air Duct Cleaning Is Belmont’s Preferred Air Duct Cleaning Company
We’ve been part of the Cedarwell family since 2005, and our Air Duct Cleaning team has built a reputation in Belmont by treating homes the way we’d want our own treated. Shoe covers and drop cloths on every visit. Quiet tools when there’s a toddler napping down the hall. Pet-safe product choices where available. Our technicians are background-checked, uniformed, and trained to the Cedarwell C.A.R.E. values.
Belmont homeowners call us back because we explain what we’ll do before we do it, and exactly what it will cost before we start. No per-vent pricing games. No surprise add-ons once the van is in your driveway. Just one flat price per system, agreed in writing, backed by our 365-Day Done Right Promise.
A live person answers our phone 24/7. Not a voicemail, not a chatbot. When you call (323) 918-4345, you’ll speak to someone who can schedule your Belmont appointment and answer your questions.
HVAC Duct Cleaning in Belmont
HVAC Duct Cleaning in Belmont addresses a problem most homeowners don’t expect: moisture-driven biological contamination inside ductwork that sits idle for months. Because Belmont summers rarely get hot enough to run air conditioning regularly, your system’s blower isn’t moving enough air to dry out crawlspace runs. The marine layer that rolls off the Bay stalls over Belmont’s hillside terrain, keeping humidity elevated even when the sun’s out. Condensation builds. Mold colonizes. And the first sign is often a musty smell you can’t locate.
Our HVAC duct cleaning process starts with a video inspection so you see what we see. We set up negative pressure containment with HEPA filtration, then use Rotobrush and Nikro agitation equipment to source-remove debris rather than just blowing it around. A typical residential HVAC duct cleaning in Belmont runs $450-$750 depending on system size, accessibility, and whether we find disconnected or degraded ductwork that needs sealing.
Supply and Return Duct Cleaning
Supply ducts push conditioned air to your rooms; return ducts pull air back to the handler. In Belmont’s older homes, both are vulnerable. Supply runs in hillside crawlspaces often sag or disconnect at joints, pulling damp ground air into your living space. Return ducts accumulate the most debris because they’re the intake path. We clean both with equal attention.
Full System Cleaning with Video Documentation
Every full-system job includes before-and-after video or photo documentation. You’ll see the condition of your duct interiors, any damage we find, and the results after cleaning. This matters especially in Belmont, where moisture damage can hide in sections of ductwork that haven’t been accessed in decades.
Vent Cleaning in Belmont
Vent Cleaning in Belmont covers the registers, grilles, and individual duct runs that connect to your rooms. Most homeowners notice vent problems first: dust coating the grille, weak airflow from one room, or a persistent odor when the system runs. In Belmont, we often find that vent issues trace back to crawlspace ductwork failure rather than simple register buildup.
Our vent cleaning service removes accumulated debris from each register run and inspects the connection point to the main trunk line. We check for crushed flex duct, disconnected joints, and moisture staining that indicates a bigger problem upstream. Individual vent cleaning in Belmont typically runs $85-$150 per register when done as a standalone service, or it’s included in a whole-system clean.
Dryer Vent Cleaning
Dryer vent cleaning is critical in Belmont’s older homes. The visible lint trap catches only a fraction of what your dryer produces. The rest accumulates in the full run, and in homes built during the 1950s-1960s, that run may be longer and more convoluted than modern codes allow. This is the leading factor in home dryer fires. We clear the full run from appliance to exterior termination and verify airflow with a meter.
Register and Grille Detailing
We remove each register, clean the grille and the surrounding finish work, and treat the immediate duct opening. In homes with pets or kids, this is where hair, small toys, and debris collect. We work carefully around your walls and flooring, protecting surfaces with drop cloths from the moment we walk in.
Trusted Brands We Service in Belmont
Our crews arrive with professional equipment from Nikro, Honeywell, and Abatement Technologies, not rental-grade machines. We’ve chosen these brands for consistent suction power, HEPA filtration efficiency, and the ability to handle Belmont’s specific challenges: moisture-compacted debris, degraded fiberglass duct board, and tight crawlspace access. We stock common replacement parts and sealing materials locally, so if we find disconnected ductwork or a failed liner during your Belmont cleaning, we can often address it same-visit rather than scheduling a return trip. That means less disruption to your household and a system that actually performs when we’re done.
Common Air Duct Cleaning Problems We See in Belmont Homes
- Sagging or disconnected crawlspace ducts in Belmont Hills homes. Steep lot grades make access so difficult that sections of ductwork have been partially disconnected for years, funneling unconditioned, moisture-laden air straight into living areas. We routinely find this on first-time inspections.
- Degraded fiberglass duct board in 1950s-1960s flats near Ralston Avenue. Year-round marine-layer humidity breaks down the liner material faster than in drier inland markets. Cleaning alone won’t fix it; the liner often needs replacement or sealing with a specialized coating.
- Musty odors mistaken for ordinary dust. Homeowners in Belmont’s fog belt often don’t realize their ducts harbor mold until the smell becomes unmistakable or allergy symptoms flare. The low airflow from idle summer systems lets contamination spread undetected.
- Lint-choked dryer vents in older homes with long runs. Original construction in the Homeview and Ralston Avenue areas frequently includes dryer vent paths that exceed modern length limits, compounding buildup and fire risk.
Pricing for Air Duct Cleaning in Belmont, CA
A typical residential air duct cleaning in Belmont runs $350-$650 for a whole-home system, with most families landing in the $450-$550 range for a single-furnace home with 12-20 registers. Dryer vent cleaning adds $125-$225. If we find degraded duct board, disconnected runs, or significant mold contamination that requires sealing or coating work, costs can extend to $800-$1,400 for the full remediation.
What affects your price: system size and register count, crawlspace accessibility (Belmont Hills lots take more time), the condition of existing ductwork, and whether video inspection reveals damage that needs repair beyond cleaning. We give you one flat price per system, agreed in writing, before any work starts. No per-vent add-ons. No surprises on the invoice. Call (323) 918-4345 for a free estimate.
We Also Serve Cities Near Belmont
Our crews work throughout the mid-Peninsula. If you’re in Belmont or nearby San Carlos, San Mateo, Redwood City, or Burlingame, we cover your area with the same written pricing, background-checked technicians, and 365-Day Done Right Promise.
Serving Belmont, CA - Our Local Coverage Area
We’re based in the Belmont 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 Belmont
Belmont sits deeper in the coastal fog belt, with heavier marine-layer intrusion and hillside terrain that traps moisture-laden air longer than flatter neighboring cities. Summers rarely get hot enough for regular AC use, so systems sit idle while condensation accumulates in unconditioned crawlspace ducts. Call (323) 918-4345 if you smell mustiness you can’t locate.
Yes. Our crews carry specialized access equipment for hillside crawlspaces, and we’ve worked the steep lots throughout the Belmont Hills above Ralston Avenue and Alameda de las Pulgas. We document what we find with video, and we’ll show you the condition of ductwork that may not have been inspected in decades. Call (323) 918-4345 to schedule.
Original sheet-metal supply and return ducts, often with early fiberglass duct board insulation that’s degraded from decades of humidity exposure. The metal itself holds up, but the liner breaks down, and joints may have never been properly sealed. We frequently recommend liner replacement or sealing in addition to cleaning for these homes.
If your video inspection shows disconnected joints, visible gaps at trunk connections, or degraded liner material, cleaning alone won’t solve the problem. You’ll also notice uneven heating or cooling, excessive dust after cleaning, or persistent mustiness. We explain what we find and give you separate pricing for cleaning versus sealing so you can decide.
Belmont’s climate does accelerate moisture-related problems, but frequency depends more on your home’s specific conditions: crawlspace vs. attic ductwork, whether your system includes a whole-home dehumidifier, and the age of your duct materials. Most Belmont homes benefit from inspection every 3-5 years, with cleaning or remediation as needed based on what we find. Call (323) 918-4345 and we’ll assess your situation.
Written by Paul Adeyemi, Owner at Morton’s Air Duct Cleaning, serving Belmont and the Peninsula since 2005.




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