Fast, Reliable Air Duct Cleaning Across San Anselmo
Air duct cleaning in San Anselmo typically runs $380-$780 for a full residential system, with most jobs completed in a single visit. We’re usually on site in San Anselmo within 24 hours of your call, and every job starts with a camera inspection so you see exactly what’s inside your ducts before we touch a tool. Call (855) 401-6006 for upfront pricing and a free estimate.
We’ve been driving the winding roads of Marin County since 1984, and San Anselmo’s mix of century-old Craftsman bungalows, Victorian cottages along Sir Francis Drake Boulevard, and hillside homes off Red Hill Avenue is familiar territory for our crews. The town’s position at the bottom of Ross Valley creates conditions we don’t see in the drier hills above Fairfax or the bay exposure of San Rafael. Our technicians know which San Anselmo neighborhoods sit on the floodplain, where the fog lingers longest, and how that affects what accumulates inside ductwork.
Why Bellows Air Duct & Vent Co. of California Is San Anselmo’s Preferred Air Duct Cleaning Company
San Anselmo homeowners have called us back for 42 years because we show our work. Every duct cleaning includes camera-verified before-and-after footage, not a handshake and a promise. Our Air Duct Cleaning in San Anselmo crews are background-checked, uniformed, and trained on the specific challenges of pre-1950s Marin County housing stock.
We answer our phones live, 24 hours a day. No voicemail maze, no app to download. When a San Anselmo caller reaches us, they speak to a person who can dispatch a technician, confirm pricing, and book the next available slot. Most San Anselmo appointments are scheduled within a day, and the vast majority of cleanings finish in one visit.
Our pricing is disclosed upfront before work begins. The number you hear on the phone matches the number on the invoice. No bait coupons, no upsells at the door, no “while we’re here” surprises. This is how Roger Castañeda has run Bellows since 1984, and it’s why San Anselmo customers who’ve been burned by discount operators stick with us.
We back every job with our 90-Day Done Right Promise in writing. If something isn’t right, we return at no charge. No paperwork to file, no arguments to win.
Our Air Duct Cleaning Services in San Anselmo
Residential Duct Cleaning
San Anselmo’s housing stock is unlike anywhere else in Marin. The town is overwhelmingly built from 1905 to 1950, with original or partially updated forced-air systems running through uninsulated crawl spaces beneath Craftsman bungalows near San Anselmo Avenue and Victorian cottages off Center Boulevard. These older sheet-metal ducts with degraded mastic joints collect contamination, leak conditioned air, and admit pests in ways that tract-home flex-duct simply doesn’t. Our residential cleaning addresses the full supply and return network, including registers, boots, and the main trunk lines where decades of debris settle.
Commercial Duct Cleaning
San Anselmo’s commercial buildings, from the storefronts along San Anselmo Avenue to office spaces near the Hub, present different challenges than residential work. Higher occupancy means more particulate load. Older mixed-use buildings often share duct systems between floors in ways that modern codes wouldn’t allow. We clean these systems with the same camera-verified approach, scheduling around business hours when needed and documenting results for property managers and landlords.
Supply Duct Cleaning
Supply ducts push conditioned air into your living spaces. In San Anselmo, these lines often run through the same damp crawl spaces that trap Ross Valley moisture, making them prime locations for mold colonization and dust-mite proliferation. We clean each supply branch individually, sealing registers during the process to prevent cross-contamination, then verify clearance with camera inspection before restoring airflow.
Return Duct Cleaning
Return ducts pull air back to the HVAC unit for reconditioning. They’re the entry point for whatever’s floating in your home, and in San Anselmo’s older houses, that includes fine ash and smoke particulate from regional fire events that standard filters don’t catch. Our return duct cleaning removes this buildup from the grille, the boot, and the full length of the return trunk, improving system efficiency and indoor air quality.
Full System Cleaning
For San Anselmo homes with the compounded problems of valley humidity, flood residue, and fire-season particulate, piecemeal cleaning isn’t enough. Our Full System Cleaning treats the complete duct network, HVAC cabinet, blower assembly, and coils as an integrated system. We use Rotobrush contact cleaning for heavy debris, Nikro HEPA vacuums for fine particulate, and Abatement Technologies filtration to protect your home during the process. This is the service we most often recommend for pre-1950s homes in the 94960 ZIP code.
Video Inspection
Every Bellows job starts and ends with camera inspection, but we also offer standalone video inspection for San Anselmo homeowners who want to assess their ducts before committing to full cleaning. In San Anselmo’s crawl spaces, this is particularly valuable. Hidden moisture pockets, pest debris, and silt lines from past flooding are invisible from the registers but obvious on camera. We’ve found collapsed flex-duct collars, separated mastic joints, and active mold colonies that homeowners had no idea existed.
On San Anselmo Creek’s floodplain near Lansdale Avenue, we cleaned a 1910 Craftsman’s original sheet-metal ducts, finding silt lines and mold colonies from past inundation. Using our Rotobrush and Abatement Technologies HEPA filtration, the video inspection showed the restored ductwork as clear as new.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in San Anselmo
Our San Anselmo crews work with professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, the same brands serious HVAC contractors specify for commercial and residential jobs. We stock common fittings, collars, and sealing materials locally, so when your 1920s San Anselmo home needs a mastic joint repaired or a degraded boot replaced, we don’t waste a day ordering parts. Honeywell and Aprilaire filtration upgrades are available for homeowners who want to add protection against the fine particulate that fire season brings to Marin County.
Common Air Duct Cleaning Problems We See in San Anselmo Homes
- Silt and mold from creek flooding. Streets within a block or two of San Anselmo Creek routinely yield duct systems with visible silt lines and active mold colonies. Rushing a cleaning without addressing this contamination means repeat problems within months.
- Degraded mastic joints in pre-1950s ductwork. The original sealant on San Anselmo’s century-old sheet-metal ducts has hardened, cracked, or failed entirely. Cleaning without resealing these joints worsens leakage and admits new contamination.
- Hidden moisture in uninsulated crawl spaces. The Ross Valley’s trapped fog keeps these spaces measurably damper than surrounding hills. Without video inspection, moisture pockets and pest debris remain undetected after surface cleaning.
- Fire-season particulate accumulation. Fine ash from the 2017, 2019, and 2020 fire events has infiltrated aging duct systems lacking modern filtration, particularly in homes with original or single-pane windows that don’t seal tightly.
Pricing for Air Duct Cleaning in San Anselmo, CA
A typical residential duct cleaning in San Anselmo runs $380-$580 for a standard single-system home up to about 2,500 square feet. Larger homes, typically the hillside properties off Sequoia Avenue or Fernwood Drive with multiple zones or extensive duct networks, range from $550-$780. Full System Cleaning including HVAC cabinet and coil cleaning adds $180-$320. Standalone video inspection is $180-$250, credited toward full cleaning if you proceed within 30 days.
What moves the price: the number of supply and return vents, accessibility of crawl spaces (some San Anselmo basements and under-floor areas are tight), contamination severity, and whether duct sealing or repair is needed. We disclose the full price before starting. The estimate is free, and there’s no charge to walk the job with you and explain what we found.
Our standing offers apply: $50 off any repair over $250, free second opinion on any written estimate, $89 seasonal tune-up, and a permanent 5% senior and veteran discount.
| Service | Typical Range in San Anselmo |
|---|---|
| Residential Duct Cleaning (standard home) | $380 - $580 |
| Residential Duct Cleaning (large/multi-zone) | $550 - $780 |
| Full System Cleaning (includes HVAC) | Add $180 - $320 |
| Video Inspection (standalone) | $180 - $250 |
| Commercial Duct Cleaning | $680 - $1,400+ |
We Also Serve Cities Near San Anselmo
Our Air Duct Cleaning crews work throughout central Marin County. We regularly serve Fairfax, Kentfield, San Rafael, and Larkspur, and we’re familiar with the different conditions each town presents, from Fairfax’s drier hillside exposure to San Rafael’s bay influence and Larkspur’s mixed-era housing. Same-day scheduling often available for neighboring communities.
Serving San Anselmo, CA - Our Local Coverage Area
We’re based in the San Anselmo 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 - Air Duct Cleaning in San Anselmo
San Anselmo sits at the bottom of Ross Valley, where fog and moisture pool between the Marin hills, keeping crawl spaces and ductwork measurably damper than Fairfax’s elevated, better-drained terrain. This persistent humidity accelerates mold and dust-mite growth inside ducts that Fairfax homes simply don’t experience at the same rate. If you’re seeing musty odors or allergy symptoms, call (855) 401-6006 for a free video inspection.
No permit is required for standard residential air duct cleaning in San Anselmo. Duct repair, modification, or new installation may trigger Marin County building department requirements, and we’ll advise if your job crosses that line. We handle the paperwork when needed. Call (855) 401-6006 to discuss your specific situation.
Every 3-5 years for most pre-1950s San Anselmo homes, though homes on the floodplain near San Anselmo Creek or with known moisture issues may need more frequent inspection. The original sheet-metal ducts and degraded mastic joints in these houses accumulate contamination faster than modern systems. We recommend starting with a video inspection to establish a baseline. Call (855) 401-6006 to schedule.
Yes. We clean commercial duct systems throughout San Anselmo, from retail spaces along San Anselmo Avenue to professional offices and mixed-use buildings. Commercial work is scheduled to minimize business disruption, and we provide documentation for property managers and landlords. Call (855) 401-6006 for a commercial estimate.
Yes. Video inspection reveals fine ash and smoke particulate that settles in ductwork, particularly in older San Anselmo homes without modern filtration. We’ve documented fire residue in returns, supply branches, and HVAC cabinets that homeowners had no other way to detect. The inspection takes about an hour, and you’ll see the footage in real time. Call (855) 401-6006 to book.
Ready to see what’s inside your ducts? Call Bellows Air Duct & Vent Co. at (855) 401-6006 for upfront pricing and a free estimate in San Anselmo. We’ll be there when we say, we’ll show you the camera footage, and we’ll stand behind the work for 90 days in writing.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co., serving San Anselmo since 1984.