Air Duct Cleaning in San Lorenzo - Same-Day Service, Done Right the First Time

Fast, Reliable Air Duct Cleaning Across San Lorenzo

Air duct cleaning in San Lorenzo typically runs $350-$750 for a full residential system, with most jobs completed in a single visit and camera-verified results before we leave. If your home was built during the Bohannon-era development boom of the 1940s and 1950s, your ductwork is likely 70-80 years old with original galvanized runs, deteriorated flex connections, and decades of debris that standard vacuums can’t touch. We’re Bellows Air Duct & Vent Co. of California, and we’ve been serving East Bay homeowners since 1984 - long enough to know that San Lorenzo’s postwar tract homes present problems no inland city faces. Call us at (855) 401-6006 for upfront pricing and a free estimate. We’ll be there when we say.

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Why Bellows Air Duct & Vent Co. of California Is San Lorenzo’s Preferred Air Duct Cleaning Company

We’ve worked in San Lorenzo’s 94580 ZIP code for over four decades. The Bohannon-era ranches on Via Alamosa, the minimal-traditional homes near Lewelling Boulevard, the postwar streets off Hesperian Boulevard - our technicians know these floor plans because we’ve cleaned ducts in hundreds of them. That matters when your crawlspace ductwork was routed through unconditioned space close to the bay flatlands and has been collecting moisture and debris since Truman was president.

Our customers in San Lorenzo call us back because we show them the problem before we fix it. Every job gets a camera inspection of the ductwork before and after. No claims without proof. Our 90-Day Done Right Promise is stamped on every invoice - if it’s not right, we return at no charge with no paperwork required.

Calls are answered by a live person, 24 hours a day. Not a voicemail. Not an app. Background-checked, uniformed technicians arrive in marked vehicles, and pricing is disclosed before a single tool is lifted. The number on the phone is the number on the invoice. We’ve built our reputation on never needing to be called back - and on picking up the phone when someone does.

Our Air Duct Cleaning Services in San Lorenzo

Residential Duct Cleaning

Most San Lorenzo homes were built between 1944 and the early 1950s as one of the Bay Area’s first large-scale postwar planned tract communities. The overwhelming majority of these houses still run on original or once-updated forced-air duct systems. That means corroded sheet metal, cracked flex connections, and sediment buildup that has never been professionally removed. Our residential cleaning uses Rotobrush agitation and Nikro HEPA extraction to dislodge and remove decades of accumulation without damaging fragile older components. We inspect first, clean second, verify third.

Commercial Duct Cleaning

San Lorenzo’s commercial buildings along Hesperian Boulevard and Lewelling Boulevard - many of them converted from mid-century retail or light industrial use - often share the same aging infrastructure as the residential tracts. We clean commercial systems with the same camera-verified process, scaled to larger square footage and more complex zone controls. Upfront pricing, single-visit completion, and minimal disruption to operations. Our Air Duct Cleaning team coordinates with property managers to schedule around tenant hours.

Supply Duct Cleaning

The supply ducts in Bohannon-era homes were typically routed through crawlspaces with minimal insulation. After 70-plus years, that insulation wrap has often deteriorated, trapping moisture against the metal. We clean supply runs with particular attention to corrosion points and pinhole leaks - because pushing debris through a corroded seam just relocates the problem to your living room. Sealing comes before cleaning when we find active leaks.

Return Duct Cleaning

Return ducts pull air back to the handler, which means they collect the heaviest concentration of household dust, pet dander, and - in San Lorenzo - fine ash particulate from regional wildfire events. These returns are often the largest diameter runs in the system and the most neglected. We give return duct cleaning priority attention on every San Lorenzo job, with extended agitation time and post-clean verification.

Full System Cleaning

A full system cleaning addresses supply ducts, return ducts, trunk lines, registers, and the air handler cabinet as one integrated unit. In San Lorenzo’s 1940s homes, this is almost always the right approach. Piecemeal cleaning leaves debris in connected components that immediately recontaminate the work. We quote full system cleaning as our standard recommendation for Bohannon-era properties, with line-item transparency if you need to phase the work.

Video Inspection

We video inspect every San Lorenzo duct system before proposing any work. For 70-year-old galvanized ductwork, this isn’t optional - it’s how we find corroded seams, collapsed flex, and moisture damage that would make cleaning ineffective or counterproductive. You see what we see. The footage belongs to you. And it informs whether cleaning, sealing, or replacement is the honest recommendation.

Trusted Brands We Service in San Lorenzo

We clean with professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies - the same brands serious HVAC contractors specify for commercial and residential work. For air quality upgrades after cleaning, we install Honeywell and Aprilaire filtration and humidification components sized to San Lorenzo’s specific conditions. We don’t chase the lowest bid on equipment because we’ve seen what cheap tools leave behind in 70-year-old ductwork. Our technicians carry common replacement parts for these brands on every truck, which means most San Lorenzo jobs finish in one visit without waiting on a parts run to Oakland or Hayward.

Common Air Duct Cleaning Problems We See in San Lorenzo Homes

• Moisture-damaged insulation wrap in crawlspaces. Because San Lorenzo’s ducts run through unconditioned crawlspaces near the bay flatland grade, the insulation wrap often deteriorates and traps moisture from the daily marine layer. This creates mold conditions that vacuuming alone won’t address - sanitizing treatments are standard on most jobs here.
• Corroded galvanized seams with pinhole leaks. Original galvanized ducts develop pinhole leaks from decades of humidity exposure. Without sealing those first, cleaning just pushes debris out of the holes into the living space. We find these with video inspection and seal before agitation.
• Wildfire ash strata in poorly sealed systems. Regional wildfire smoke events push fine ash particulate through San Lorenzo’s older homes, which typically lack modern high-MERV filtration. Technicians report finding visually distinct dark ash-laden strata layered over years of ordinary household dust - a signature of recent fire seasons especially pronounced in these Bohannon-era duct runs.
• Skipped video inspection and sanitizing. Homeowners who hire discount operators often get a surface vacuuming that leaves behind the ash-laden debris and mold spores. The system recontaminates within weeks. Our camera-verified, sanitize-as-standard approach prevents this.

We recently serviced a 1946 Bohannon-built ranch on Via Alamosa where the original galvanized duct had a corroded seam near the crawlspace access: marine-layer moisture had entered, and a deep ash layer from the 2020 fire season lay atop household dust. Our Rotobrush system removed the debris, and we applied an EPA-registered sanitizer specific to mold remediation.

Pricing for Air Duct Cleaning in San Lorenzo, CA

We Also Serve Cities Near San Lorenzo

Our technicians work throughout the East Bay flatlands, including Air Duct Cleaning in San Lorenzo and neighboring Ashland, San Leandro, Cherryland, and Castro Valley. The same marine-layer humidity and aging postwar housing stock affects duct systems across this corridor, and we apply the same inspection-first, verify-after process in every city we serve.

FAQs - Air Duct Cleaning in San Lorenzo