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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AfterFast, Reliable Air Duct Cleaning Across Belmont
Air duct cleaning in Belmont typically runs $450 – $850 for a full residential system, with most jobs completed in a single visit. We dispatch crews from our San Francisco Bay Area office and serve Belmont neighborhoods including the hillside tracts off Chula Vista Drive, the mid-century ranches near Twin Pines Park, and the older homes along Alameda de las Pulgas. Our Air Duct Cleaning team knows the crawlspaces, the original galvanized steel ductwork, and the way wildfire smoke from the Santa Cruz Mountains settles into flex duct runs that sag in cool, damp conditions. Call (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is Belmont’s Preferred Air Duct Cleaning Company
We’ve been part of the Garrison Partners family since 2004, and our crews have worked in enough Belmont crawlspaces to know what the housing stock hides. The 1940s through 1970s ranchers and two-story traditional homes here weren’t built with today’s HVAC standards. Original galvanized ducts corrode. Flex duct crushes under foundation piers or seismic retrofit brackets. We’ve found supply runs blowing heated air into the dirt for years, and homeowners who blamed their furnace for rooms that never warmed up.
Our technicians are background-checked, uniformed, and expected to operate by The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. Every job carries our 365-Day Done Right Promise in writing. If the work fails within a year, we return and make it right at no charge, including a free second visit. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
Belmont customers call us back because we show them what we find. Camera inspection footage. Before-and-after photos of their own ducts. A written price that doesn’t move at the door. That’s The Garrison Standard, and it’s how we operate in Belmont and every city we serve.
Air Duct Repair in Belmont
Air Duct Repair in Belmont usually addresses crushed, disconnected, or corroded duct runs hidden in crawlspaces and attics, with most repair jobs ranging from $380 – $720 depending on accessibility and material. Belmont’s mid-century housing stock is the culprit: original galvanized steel rusts through at seams, flex duct degrades in damp crawlspaces, and seismic retrofits or plumbing repairs often crush or sever runs without the homeowner knowing.
Disconnected Trunk Lines
A main trunk separated at a joint or bracket wastes 20 – 30% of conditioned air into the crawlspace. We locate the break with camera inspection, reconnect with mechanical fasteners and mastic sealant, then test static pressure to confirm the fix. Most disconnected trunks in Belmont homes take 2 – 3 hours to access, repair, and verify.
Corroded Galvanized Duct Replacement
Original steel ducts from the 1950s and 1960s rust from the inside out, especially where condensation collects. We cut out failed sections and replace with insulated flex duct or sheet metal, sealed to NADCA standards. Replacement runs in Belmont attics and crawlspaces typically cost $280 – $550 per section.
Ductwork Cleaning in Belmont
Ductwork Cleaning in Belmont removes accumulated debris from supply ducts, return ducts, and the main trunk line using rotary brush agitation and negative-air extraction, with residential whole-system cleaning priced at $450 – $850. The job takes 3 – 5 hours for a typical Belmont home and includes register covers, boot boxes, and the air handler cabinet.
Smoke Residue Removal
After wildfire seasons, fine ash particles coat the interior of flexible ducts even when HVAC filters are changed. Standard vacuuming won’t remove it. We use HEPA-filtered negative-air machines and chemical sponges to break the bond between ash and duct lining. This is specialized work that general duct cleaners often skip.
Mold and Mildew Treatment
Belmont’s marine layer keeps crawlspaces cool and damp. Flex duct that sags between supports never fully dries, and mold colonizes the interior. We apply EPA-registered antimicrobial treatment after mechanical cleaning, then verify with post-treatment inspection. This step is critical for homes near the canyon areas where fog lingers.
Trusted Brands We Service in Belmont
Our equipment roster includes Rotobrush rotary brush systems, Nikro negative-air machines, and filtration products from Honeywell, Aprilaire, and Abatement Technologies. These are the same tools commercial crews use, not hardware-store gear. For Belmont homes with integrated whole-house filtration, we stock replacement media for Honeywell and Aprilaire units, which means faster turnaround when a cleaning reveals a clogged or degraded filter housing. We also carry Guardsman-treated antimicrobial products for mold-prone systems. Our technicians explain what each piece of equipment does and why it matters for your specific duct configuration before starting work.
Common Air Duct Cleaning Problems We See in Belmont Homes
- Crushed flex duct under foundation piers. Seismic retrofits and plumbing repairs in Belmont’s crawlspaces often compress or sever flex runs. The blower motor works harder, rooms stay cold, and the homeowner blames the furnace. We find these with camera inspection and restore airflow at the source.
- Smoke odor that persists after filter changes. Wildfire ash particles are smaller than standard filter media can catch. They embed in flexible duct interiors and re-circulate when the system runs. Surface cleaning of registers misses the problem entirely.
- Mold in sagging crawlspace duct. Belmont’s marine layer and narrow hillside streets that block sun exposure keep crawlspaces damp. Flex duct with inadequate support sags, pools condensation, and grows mold that spores into living spaces every time the blower cycles.
- Disconnected supply runs blowing into dirt. Original galvanized trunks separate at seams or seismic brackets. Conditioned air escapes before reaching rooms. Utility bills climb. We seal and reconnect to NADCA standards.
Pricing for Air Duct Cleaning in Belmont, CA
Residential duct cleaning in Belmont runs $450 – $850 for a complete system, including supply ducts, return ducts, main trunk, and air handler cabinet. Commercial systems start around $1,200 and scale with square footage and HVAC zoning. Duct repair work, including disconnected trunk reconnection or corroded section replacement, typically falls between $380 – $720. Video inspection alone is $180 – $250 and is included at no charge when bundled with cleaning.
What moves the price: accessibility of crawlspace or attic, number of registers, presence of mold requiring antimicrobial treatment, and smoke residue removal after wildfire season. We give you one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Belmont
Our crews work throughout the mid-Peninsula, including San Carlos, San Mateo, Redwood City, and Burlingame. Each community has its own housing stock and climate conditions, and we adjust our approach accordingly. If you’re outside Belmont city limits but nearby, the same written pricing, background-checked technicians, and 365-Day Done Right Promise apply.
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
The fine ash particles from Santa Cruz Mountains wildfires are smaller than standard HVAC filters can capture, and they coat the interior of flexible ducts where filters don’t reach. We remove this residue with HEPA vacuum extraction and chemical sponge treatment applied directly to the duct lining. Call (361) 326-5060 for an exact quote – estimates are free.
Uneven room temperatures, rising utility bills without rate increases, and a blower motor that runs longer than it used to are the common signs. We verify with video camera inspection fed through the register or air handler. The camera shows you exactly what we find before we quote any repair. Call (361) 326-5060 to schedule an inspection.
Yes. The cool, moist air that rolls in from the bay keeps crawlspaces damp, especially on north-facing hillsides and in narrow streets with limited sun exposure. Flex duct that lacks proper support sags, collects condensation, and never fully dries. Mold follows. We treat active growth with EPA-registered antimicrobial products and address the underlying drainage or support issue. Call (361) 326-5060 for an assessment.
NADCA, the National Air Duct Cleaners Association, sets the industry standard for mechanical cleaning: source removal with agitation and negative-air collection, sealed access ports, and protection of the occupied space. For Belmont’s older homes with original duct materials, NADCA compliance means we don’t cut corners that could damage fragile galvanized steel or leave flex duct torn. Call (361) 326-5060 and we’ll explain how the standard applies to your specific system.
No. Dryer vent cleaning is a separate service with different equipment and safety requirements. Lint buildup in dryer exhaust ducts is a fire hazard and requires rotary brush tools designed for that specific task. We offer dryer vent cleaning as a standalone service and can schedule both on the same visit. Call (361) 326-5060 to bundle services.
Ready to see what’s inside your ducts? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate. We’ll show up in the quoted window, give you a written price before any work starts, and back every job with our 365-Day Done Right Promise. That’s The Garrison Standard, and it’s how we work in Belmont.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Belmont since 2004 as part of the Garrison Partners family.