Fast, Reliable Air Duct Cleaning Across San Lorenzo
Air duct cleaning in San Lorenzo typically runs $380-$780 for a full residential system, with most jobs completed in a single visit. We’re usually on-site in San Lorenzo within 60-90 minutes of your call, and every job starts with a camera inspection so you see what’s inside before we touch a tool. Call (844) 685-6342 for upfront pricing and scheduling.
We’ve been driving to San Lorenzo since 1984, long before the 238 freeway connected the town more directly to the rest of the East Bay. Our technicians know the grid of Bohannon-built streets - Via Alamitos, Via Del Sol, the long blocks off Lewelling Boulevard - and we understand the raised-foundation crawl spaces that run beneath nearly every home in the 94580 ZIP. That local knowledge matters when you’re trying to trace a duct leak or find where rodents have been nesting. We don’t guess. We look, we show you, and we fix it.
Why Bellows Air Duct & Vent Co. Is San Lorenzo’s Preferred Air Duct Cleaning Company
San Lorenzo homeowners call us back because we treat the job like we’re working on our own neighborhood. Over 42 years, we’ve built our reputation on showing up when we say, pricing the work before we start, and standing behind it for 90 days with no paperwork if something needs attention.
Our customers in San Lorenzo leave reviews mentioning the same things: the technician arrived in a marked truck, wore a uniform, and walked them through the video inspection. They mention that the price on the phone matched the price on the invoice. We don’t bait with a low coupon and then add charges at the door - that’s not how we work, and it’s not how you stay in business for four decades in the same communities.
Response time to San Lorenzo averages under 90 minutes during business hours, and our office answers calls 24 hours a day with a live person, not a voicemail tree. When your furnace is blowing musty air or you’re hearing rodents in the vents, you don’t want to leave a message and hope.
We also know the local conditions that shape duct problems here: the marine layer rolling in off the bay, the damp crawl spaces along San Lorenzo Creek, the original 1940s and 1950s flex-duct connections that are aging out simultaneously across whole neighborhoods. That specific knowledge means faster diagnosis and repair that actually lasts.
Our Air Duct Cleaning Services in San Lorenzo
Residential Duct Cleaning
Most San Lorenzo homes are the same Bohannon ranch or minimal traditional built between 1944 and 1955, with forced-air ductwork running through unconditioned crawl spaces instead of attics. That configuration collects decades of dust, mold spores, and rodent debris where homeowners never see it. Our residential cleaning starts with a video inspection of your full supply and return runs, followed by mechanical agitation with Rotobrush equipment and HEPA vacuum extraction. We finish with a second camera pass so you see the difference. A typical full residential duct cleaning in San Lorenzo runs $380-$620 depending on system size and contamination level.
Commercial Duct Cleaning
San Lorenzo’s commercial buildings along Hesperian Boulevard and the industrial pockets near the 880 corridor need scheduled duct maintenance to maintain air quality for employees and customers. We handle office suites, retail spaces, and light industrial facilities with Nikro and Abatement Technologies equipment sized for larger systems. Our commercial crews work after hours when needed, and pricing starts around $780-$1,400 for typical small-to-medium San Lorenzo commercial installations. We coordinate with your facilities manager and provide documentation for insurance or lease compliance.
Supply Duct Cleaning
The supply ducts in San Lorenzo’s Bohannon homes carry a specific problem: collapsed insulation and moisture staining from decades of crawl-space humidity. When we clean supply runs, we’re not just removing dust. We’re identifying where insulation has degraded, where galvanized straps have corroded from salt air exposure, and where flex-duct joints have separated. Supply duct cleaning alone in San Lorenzo typically runs $220-$380, though we often recommend pairing it with return cleaning for full system balance.
Return Duct Cleaning
Return ducts pull air back to your furnace, and in San Lorenzo’s older homes they’re often the entry point for the heaviest contamination - rodent nesting, damp debris, and mold colonies that thrive in the persistent moisture near San Lorenzo Creek. Return duct cleaning requires careful handling to avoid spreading contaminants into your HVAC cabinet. We seal the system during cleaning and use negative air pressure to capture debris. Standalone return cleaning in San Lorenzo runs $180-$320; combined with supply cleaning, most homeowners see a package in the $380-$620 range.
Full System Cleaning
For San Lorenzo homes with original or near-original ductwork, we recommend full system cleaning that covers supply ducts, return ducts, the plenum, and accessible trunk lines. This is the service that addresses the compressed aging timeline of Bohannon-built homes - when your neighbors are all facing the same duct deterioration, a surface clean isn’t enough. Full system cleaning with video inspection before and after runs $580-$780 for most San Lorenzo residences.
Video Inspection
Every job we do in San Lorenzo starts and ends with camera verification. But we also offer standalone video inspection for homeowners who want to assess their duct condition before committing to cleaning. The inspection documents rodent damage, moisture intrusion, insulation collapse, and corrosion - the four failure modes we see repeatedly in San Lorenzo crawl spaces. A standalone video inspection is $89, credited toward any cleaning service if you proceed.
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.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in San Lorenzo
Our trucks carry professional-grade equipment from Rotobrush, Nikro, and Honeywell - the same brands serious HVAC contractors specify when they’re building or repairing systems that need to last. For San Lorenzo’s salt-air environment, we stock galvanized sheet metal collars and corrosion-resistant fasteners that hold up better than standard hardware in marine-exposed crawl spaces. That means when we repair a duct section or seal a rodent entry point, we’re not using parts that will rust through in two seasons. Most repairs are completed in a single visit because our technicians arrive with the right materials already on the truck.
Common Air Duct Cleaning Problems We See in San Lorenzo Homes
- Rodent harborage in original flex-duct joints. The Bohannon tract design left connection points that rats and mice have exploited for generations. We find nesting debris, droppings, and chewed insulation block after block across San Lorenzo - a pattern far less uniform in neighboring cities with mixed housing stock.
- Galvanized steel corrosion from coastal salt air. Even inside crawl spaces, salt-laden marine layer air accelerates rust on duct straps, hangers, and sheet metal seams. Corroded straps sag and separate, creating leaks that draw in crawl-space humidity and mold spores.
- Insulation collapse from decades of moisture exposure. Original fiberglass duct insulation in San Lorenzo crawl spaces has absorbed ground moisture for 70-plus years. It compresses, delaminates, and drips condensation into supply runs, fostering mildew growth that circulates through living spaces.
- Uniform aging across entire neighborhoods. Because San Lorenzo was built in a compressed decade, duct systems on Via Alamitos fail on the same timeline as those on Via Del Sol. That means proactive inspection pays off - when your neighbor’s ducts need replacement, yours probably do too.
Pricing for Air Duct Cleaning in San Lorenzo, CA
| Service | Typical Range in San Lorenzo |
|---|---|
| Video Inspection (standalone) | $89 |
| Return Duct Cleaning | $180-$320 |
| Supply Duct Cleaning | $220-$380 |
| Full Residential System Cleaning | $380-$620 |
| Full System + Heavy Contamination | $580-$780 |
| Commercial Duct Cleaning | $780-$1,400 |
What moves the price? System size, contamination level, accessibility of crawl space, and whether we find rodent damage requiring repair or sealing. We inspect first, show you the video, and give you a fixed price before any cleaning begins. The number we quote is the number on the invoice. We also offer a permanent 5% Senior and Veteran discount, and our $89 Seasonal Tune-Up can catch duct problems before they become expensive repairs. Call (844) 685-6342 for a free estimate - we’ll ask about your home’s size, age, and any symptoms you’re noticing, and give you an honest range right then.
We Also Serve Cities Near San Lorenzo
Our Air Duct Cleaning in San Lorenzo crews also respond to calls from San Leandro, Castro Valley, Hayward, and Union City. Each city has its own housing patterns and duct configurations - San Leandro’s mixed-era development, Castro Valley’s hillside homes with attic ducts, Hayward’s newer construction alongside older stock. We adjust our approach to match, but our Air Duct Cleaning standards stay the same: camera inspection, upfront pricing, and our 90-Day Done Right Promise.
Serving San Lorenzo, CA - Our Local Coverage Area
We’re based in the San Lorenzo 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 Lorenzo
San Lorenzo was developed almost entirely by David Bohannon between 1944 and 1955 as one of California’s first large-scale planned suburbs, meaning the entire 94580 ZIP is dominated by nearly identical tract homes with the same original duct materials and configuration. Hayward and other neighboring cities grew in mixed eras with varied builders, materials, and foundation types, so duct failures there are scattered and unpredictable. In San Lorenzo, when we find rodent damage or insulation collapse on one block, we expect to find the same pattern on the next. That uniformity actually helps homeowners - it means inspection protocols are well established and repairs follow proven methods. Call (844) 685-6342 to schedule an inspection and see what condition your system is in.
Yes - marine layer humidity and salt-laden air penetrate crawl spaces year-round, accelerating corrosion of galvanized steel duct straps, hangers, and sheet metal seams even when they’re not directly exposed to weather. We’ve replaced corroded straps in San Lorenzo homes that were installed just ten years ago, while inland East Bay cities see similar hardware last twice as long. The salt air also keeps crawl spaces persistently damp, which degrades duct insulation and promotes mold growth that wouldn’t occur in drier conditions. Our technicians use corrosion-resistant hardware and galvanized collars specifically for this environment. For a video inspection that documents any salt-air damage in your system, call (844) 685-6342.
We consistently find rat and mouse nesting inside the original flex-duct connection points at trunk-line junctions - the Bohannon design left gaps and soft connection materials that rodents have exploited for decades. The damage includes chewed flex-duct walls, packed nesting debris reducing airflow, and droppings contaminating the entire downstream supply run. On Via Alamitos, we restored air quality in a classic Bohannon ranch where our video inspection revealed years of rat nesting inside the original flex-duct joints. We deployed Rotobrush agitation and a HEPA vacuum to extract debris, then sealed all gaps with galvanized sheet metal collars per San Lorenzo’s marine-exposure best practice. Rodent-damaged sections typically add $180-$340 to cleaning costs depending on linear feet affected. Call (844) 685-6342 for an inspection and exact quote.
San Lorenzo homes typically need duct cleaning every 3-5 years, compared to 5-7 years in drier inland cities like Livermore or Dublin. The difference is moisture: San Lorenzo’s bay-adjacent location and damp crawl spaces create conditions where mold and mildew accumulate faster than dust alone would require cleaning. Homes with documented rodent intrusion or visible mold may need attention every 2-3 years. We recommend a video inspection at the 3-year mark to assess whether cleaning or repair is needed before problems affect indoor air quality. Our $89 Seasonal Tune-Up includes a basic duct assessment. Call (844) 685-6342 to schedule.
We both clean and replace, depending on condition. Cleaning removes contamination from intact duct walls, but we replace sections where flex-duct is torn, insulation is collapsed beyond recovery, or rodent damage has compromised the duct structure. In San Lorenzo’s Bohannon homes, we often find that 10-20 feet of flex-duct at connection points needs replacement while the main trunk lines clean up fine. We use galvanized sheet metal collars and corrosion-resistant straps for repairs, sized for the marine environment here. Replacement sections run $45-$85 per linear foot installed, and we always show you the damage on camera before recommending replacement over cleaning. For a free assessment, call (844) 685-6342.
Ready to see what’s inside your ducts? Call Bellows Air Duct & Vent Co. at (844) 685-6342 for free upfront pricing and scheduling in San Lorenzo. We’ll answer with a live person, 24 hours a day, and we’ll be there when we say.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving San Lorenzo since 1984.