Fast, Reliable Air Duct Cleaning Across San Francisco
Air duct cleaning in San Francisco typically runs $350-$850 for a full residential system, with most jobs completed in a single visit. We serve homeowners from the Victorian flats of Nob Hill to the converted lofts of SoMa, and we answer calls live 24 hours a day at (844) 685-6342.
We’ve been driving up to San Francisco from Los Angeles for scheduled jobs since 1984, and we know the city well enough to park a service van on a 25% grade without drama. The marine layer, the salt air off the Pacific, the retrofit ductwork crammed into 130-year-old wall cavities - these aren’t abstract concepts to our technicians. They’re what we account for on every San Francisco job. When you call, you’ll speak to a live person, not a voicemail tree. We’ll give you an upfront price before we lift a single tool, and we’ll show up when we say we will.
Why Bellows Air Duct & Vent Co. Is San Francisco’s Preferred Air Duct Cleaning Company
San Francisco homeowners have been calling Bellows for over 42 years because we treat retrofit ductwork in historic buildings with the care it demands. We’ve cleaned ducts in Victorians on Russian Hill where the original floor plans had no space for HVAC, and we’ve traced mold through crawl spaces in the Mission where the fog seeps in every summer morning. Our customers in 94122, 94123, 94124, and 94125 know we’ll camera-inspect every job before and after, and they know our 90-Day Done Right Promise means we return at no charge if anything isn’t right - no paperwork, no arguing.
Our response time to San Francisco is typically next-day for standard appointments, with same-day availability for urgent mold or contamination issues. Every technician who enters your home is background-checked and uniformed. The price we quote on the phone is the price on the invoice. We’ve seen too many San Francisco residents burned by bait-and-switch operators who advertise a $99 special then upsell thousands at the door. That isn’t how we work. One honest price, shown before we start. A square deal.
Our Air Duct Cleaning Services in San Francisco
Residential Duct Cleaning
Most San Francisco homes were never built for central air. The Victorian and Edwardian flats dominating neighborhoods like the Tenderloin, Nob Hill, and North Beach were constructed between 1880 and 1915, long before forced-air HVAC existed. When ductwork was retrofitted decades later, it was threaded through wall cavities and floor chases never engineered for it. Our Air Duct Cleaning team handles these tight, non-standard layouts daily. We use Rotobrush equipment with flexible shafts that navigate sharp bends where debris accumulates, and we never cut access holes without marking their location for future service.
Commercial Duct Cleaning
SoMa’s converted warehouse lofts present a different challenge. Their industrial-grade rooftop HVAC units feed ductwork spanning large open floor plates, often untouched since the building’s conversion in the 1990s or 2000s. We clean these systems with Nikro and Abatement Technologies equipment designed for high-volume commercial applications, and we schedule around your business hours to avoid disrupting operations.
Supply Duct Cleaning
Supply ducts deliver conditioned air to your rooms. In San Francisco’s climate, they sit stagnant for months since most residents rarely run heating and almost never use air conditioning. This stagnation lets moisture from the daily fog cycle condense on duct walls, creating ideal conditions for mold. We clean supply lines thoroughly and inspect for insulation gaps that allow this condensation pattern to recur.
Return Duct Cleaning
Return ducts pull air back to your HVAC unit for reconditioning. In San Francisco’s dense mixed-use corridors, these returns sometimes draw air through shared shafts adjacent to commercial spaces. We’ve found grease film coating return ducts in upper-floor flats above restaurants in Chinatown and the Mission - even in homes where the residents never cook. Cleaning these returns requires solvent-compatible equipment and proper containment.
Full System Cleaning
Our most comprehensive service covers every component: supply ducts, return ducts, trunk lines, registers, grilles, and the air handler itself. For San Francisco’s aging retrofit systems, this is often the right choice. Corrosion at multiple connection points, mold in several duct runs, and debris accumulation throughout - these compound over time in the salt air and moisture. A full system clean gives you a complete reset, documented with before-and-after camera footage.
Video Inspection
Every job starts here. We run a camera through your ductwork before touching a brush, so you see what we see. In San Francisco’s retrofit systems, this often reveals surprises: disconnected joints hidden behind plaster, rusted fasteners ready to fail, or mold colonies in sections the homeowner never suspected. The video becomes your record. After cleaning, we run the camera again to verify results. No claim without proof.
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.
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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 Francisco
We clean and service ductwork connected to equipment from Aprilaire, Abatement Technologies, and Rotobrush - the same brands serious HVAC contractors specify for California’s demanding coastal conditions. We stock common replacement parts locally for San Francisco customers, so when corrosion has damaged a connector beyond cleaning, we can often replace it same-day rather than ordering and returning. Our technicians train on these systems specifically, not generic equipment. That matters when you’re working in a 1906-rebuilt Victorian with 6-inch clearances and original plaster walls you can’t afford to damage.
Common Air Duct Cleaning Problems We See in San Francisco Homes
- Corroded duct connectors from salt air. San Francisco’s coastal exposure accelerates corrosion of galvanized sheet-metal connections and fasteners in retrofitted duct systems. What would last 15 years inland degrades in 5-7 years here, creating air leaks that reduce efficiency and draw in unfiltered attic or crawl-space air.
- Condensation-driven mold in uninsulated ducts. The daily fog cycle pushes moisture into poorly-insulated duct runs, especially in Victorian flats where retrofit ducts were installed without proper wrapping. Stagnant air lets this moisture sit, and mold follows. We find this in crawl spaces and wall cavities throughout 94122 and 94123.
- Grease contamination in mixed-use buildings. In Chinatown and the Mission, residential flats above restaurants often have supply and return ducts coated with cooking particulate drawn through shared shafts. Residents smell food they never cooked. The source isn’t their kitchen - it’s their ductwork.
- Debris traps at sharp bends. Retrofit ductwork in pre-HVAC buildings makes turns and transitions that wouldn’t pass modern code. Dust, pet dander, and construction debris from decades past accumulate at these pinch points, restricting airflow and recirculating contaminants.
Pricing for Air Duct Cleaning in San Francisco, CA
Here’s what air duct cleaning costs in San Francisco’s market:
| Service | Typical Range |
|---|---|
| Residential duct cleaning (single system, up to 12 vents) | $350-$650 |
| Residential with video inspection and mold treatment | $550-$850 |
| Commercial system cleaning (SoMa loft, rooftop unit) | $800-$1,800 |
| Dryer vent cleaning (add-on or standalone) | $125-$225 |
| Duct repair/sealing (per linear foot, corrosion damage) | $45-$85 |
What moves you within these ranges: the number of vents and returns, accessibility (crawl space work costs more than basement access), whether mold treatment is needed, and the condition of connectors. We inspect first, quote upfront, and stick to that number. No bait, no switch. Call (844) 685-6342 for a free estimate - we’ll ask the right questions to narrow your range before we schedule.
Our standing offers apply: $50 off any repair over $250, a free second opinion on any written estimate, our $89 seasonal tune-up, and a permanent 5% senior and veteran discount.
We Also Serve Cities Near San Francisco
Our Air Duct Cleaning in San Francisco coverage extends throughout the city and into neighboring communities. We regularly work in the Mission District, Noe Valley, and Chinatown, plus Daly City just south of the county line. Same upfront pricing, same camera verification, same 90-Day Done Right Promise - whether you’re in a Victorian on Nob Hill or a mid-century ranch in Daly City.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 Francisco
Every 2-3 years for most San Francisco homes, and annually if you live within a few blocks of the Pacific or Bay where salt air concentration is highest. The marine layer’s moisture and the coastal corrosion accelerate contamination compared to drier inland climates. If you smell mustiness when your heat first kicks on, or if your registers show dark staining, call (844) 685-6342 - we’ll inspect for free and tell you if cleaning is needed.
Yes, corrosion inspection is part of our standard video inspection on every San Francisco job. We specifically examine galvanized sheet-metal connections, fasteners, and trunk-line seams where salt-air degradation typically begins. If we find corrosion, we’ll show you the footage and explain whether cleaning, sealing, or component replacement is the right fix. Call (844) 685-6342 to schedule - estimates are free.
Yes, we’ve specialized in San Francisco’s Victorian and Edwardian housing stock for decades. Our Rotobrush equipment uses flexible shafts that navigate sharp bends and tight clearances, and our technicians are trained to work in crawl spaces with as little as 18 inches of headroom. We mark every access point we create for future service. Call (844) 685-6342 and we’ll discuss your specific layout.
Yes, we apply EPA-registered antimicrobial treatments after mechanical cleaning when mold or mildew is present, which is common in San Francisco’s moisture-prone retrofit ducts. We used this approach on a Victorian flat on Nob Hill where fog-driven condensation had caused heavy mold growth in a crawl-space duct run - cleaned with our Rotobrush system, treated, then sealed. The treatment is included in our mold-remediation pricing, never added as a surprise. Call (844) 685-6342 for specifics.
Yes, in San Francisco’s hyper-dense mixed-use corridors, it’s essentially unique to this city. In Chinatown and the Mission, we’ve found cooking grease and particulate coating supply ducts in residential flats where the occupants never fry food. The contamination enters through shared shafts and courtyards adjacent to commercial kitchen exhaust. We clean these systems with solvent-compatible equipment and proper containment. If you smell cooking that isn’t yours, call (844) 685-6342 - we’ll identify the source and quote remediation.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving San Francisco since 1984.