Air Duct Cleaning in San Lorenzo, CA
Professional air duct cleaning in San Lorenzo typically runs $350-$650 for a standard single-family home and is usually completed in one visit. If your house was built during the Bohannon-era development between 1944 and the early 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., and our technicians know the flatland crawlspaces and marine-layer moisture patterns that make San Lorenzo jobs different from inland East Bay work. Call (855) 401-6006 to speak with a live person, any hour.
Why San Lorenzo Homes Are Different
San Lorenzo sits on the East Bay flatlands directly adjacent to San Francisco Bay, and that geography shapes every duct system we open. The daily marine layer pushes higher ambient humidity than you’ll find twenty miles inland, and that moisture finds its way into crawlspaces and attic runs through gaps in seventy-year-old ductwork. We regularly find mold and mildew growth in San Lorenzo ducts that owners didn’t suspect, particularly in the original flex connections routed beneath the slab-grade ranches on the north side of town. The housing stock itself is the other half of the equation. Developer David D. Bohannon built San Lorenzo as one of the Bay Area’s first large-scale postwar planned communities, and the single-story ranch and minimal-traditional homes went up fast and uniform, with duct systems that were adequate for the era but not built to last eight decades. We routinely encounter original galvanized or early flex ductwork with cracked joints, deteriorated insulation wrap, and heavy debris accumulation that has never been professionally cleaned.
Air Duct Cleaning in San Lorenzo
Air duct cleaning in San Lorenzo demands equipment and techniques matched to fragile, historic-age systems. Our process starts with camera inspection, proceeds with Rotobrush agitation and Nikro HEPA extraction, and ends with verification footage you can see. Most jobs in ZIP 94580 finish in a single visit.
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 still run on original or once-updated forced-air duct systems, meaning 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. A basic residential duct cleaning for a single system with up to 10 vents runs $350-$550 in San Lorenzo. Full system cleaning with video inspection typically ranges $550-$750. We inspect first, clean second, verify third.
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 from the daily marine layer against the metal and creating mold conditions that vacuuming alone won’t address. 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. Sanitizing treatments are standard on most San Lorenzo jobs, running $150-$300, and duct sealing of problem sections adds $200-$450 when needed. Sealing comes before cleaning when we find active leaks. Air Duct Cleaning details our full process.
Why does my San Lorenzo home need sanitizing after duct cleaning?
Sanitizing is standard here because the daily marine layer keeps humidity consistently higher than inland East Bay cities, and that moisture infiltrates aging duct systems through gaps and corroded seams. In a 1946 Bohannon tract home with original galvanized runs, mold and mildew growth inside ducts is routine. Vacuuming removes debris but doesn’t address biological contamination, so we apply EPA-registered sanitizer on most jobs. Call (855) 401-6006 for an exact quote.
Dryer Vent Cleaning in San Lorenzo
Dryer vent cleaning in San Lorenzo typically runs $149-$289 for standard single-story ranch homes, with most jobs completed in one visit. Our technicians carry the right tools and vent caps for the undersized, crawlspace-routed ductwork common to homes built between 1944 and 1950.
Vent Cleaning and Lint Removal
The basic service most San Lorenzo homeowners need is complete lint extraction from the dryer connection through the exterior cap. We use Rotobrush and Nikro equipment because these old vents need agitation, not just suction. The dense, moisture-fused lint common in 94580 requires brushes that can break it loose without damaging fragile original ductwork. Standard cleaning for a single-story Bohannon ranch runs $149-$219. Two-story configurations or longer runs add $40-$70. We’ll tell you exactly where your job falls before we start.
Vent Rerouting
Original Bohannon dryer vents were often routed with sharp 90-degree bends through crawlspaces to reach exterior walls that faced away from prevailing winds. After 70-plus years, these configurations trap lint, resist cleaning, and create fire hazards. Rerouting replaces the convoluted path with a straight, modern run using proper gauge ductwork. In San Lorenzo, rerouting typically costs $340-$580 depending on crawlspace accessibility and the new exit point. It’s a permanent fix for vents that have been problematic since the original construction. Dryer Vent Cleaning covers our full capabilities.
Why do San Lorenzo dryer vents clog faster than in other Bay Area cities?
San Lorenzo’s combination of bay-adjacent humidity and aging, unsealed crawlspace ductwork creates ideal conditions for rapid lint accumulation. The daily marine layer introduces moisture that fuses lint into dense blockages, while original Bohannon-era vents with sharp bends and corroded joints trap debris that modern systems would expel. Inland cities don’t face this same moisture load. Call (855) 401-6006 if your vent hasn’t been inspected in over a year.
HVAC Cleaning in San Lorenzo
HVAC cleaning in San Lorenzo typically runs $280-$650 for a full system cleaning, with most jobs completed in a single visit. We serve the 94580 area from our San Francisco Bay Area dispatch office, with crews that know the Bohannon tracts by their floor plans.
Evaporator Coil Cleaning
The evaporator coil in your San Lorenzo air handler works harder than it should. Marine-layer humidity keeps it wet for hours after each cycle, and fine particulate from wildfire seasons past coats the fins with a stubborn film that standard filters miss. A typical evaporator coil cleaning in San Lorenzo runs $180-$320. We use foaming cleaner followed by low-pressure rinse, then verify airflow improvement with a manometer reading before we leave. For Bohannon-era homes with coils located in closet-mounted handlers, we also inspect the condensate pan and drain line for the blockages that humidity promotes.
Blower Cleaning
The blower wheel moves every cubic foot of air your home breathes. In San Lorenzo’s older tracts, we’ve found blower housings packed with debris so thick the motor strains against the load. Cleaning the blower assembly, housing, wheel, and motor compartment typically costs $150-$260. We remove the assembly when possible for thorough cleaning off-site, then balance the wheel before reinstalling. A clean blower reduces amp draw and noise, two complaints we hear constantly from homeowners near Bockman Park. HVAC Cleaning explains our complete approach.
How often should HVAC cleaning be done in a San Lorenzo Bohannon-era home?
Every 3-5 years for homes with original or early-updated ductwork, and every 2-3 years if occupants have allergies or if the home was exposed to heavy wildfire smoke. The aged galvanized and flex ductwork in these 70-80-year-old systems accumulates debris faster than modern sealed ducting, and corroded joints allow recontamination even after thorough cleaning. Call (855) 401-6006 and we’ll assess your specific system.
Duct Repair & Sealing in San Lorenzo
Duct repair and sealing in San Lorenzo typically costs between $350 and $1,200 depending on scope, with most single-section repairs completed in one visit. If your Bohannon-era home is blowing heated or cooled air into the crawlspace instead of the living room, you’re not alone.
Duct Sealing
San Lorenzo’s 70-80-year-old Bohannon-era tract homes suffer accelerated corrosion and sediment buildup that make professional duct sealing a near-universal need. We seal corroded sheet metal seams, disconnected flex joints, and deteriorated register boots using mastic sealant and reinforced foil tape rated for temperature cycling. A typical whole-system duct sealing in San Lorenzo runs $800-$1,400, with partial sealing of problem sections starting around $350. Every sealed joint is camera-verified before we leave.
Flex Duct Repair
The plastic inner liners and fiberglass insulation wraps in original flex duct deteriorate faster in San Lorenzo’s humid crawlspaces than in drier climates. We replace collapsed, torn, or disconnected flex sections with new R-6 or R-8 insulated duct, properly supported to prevent sagging that traps moisture. Most flex repairs in 94580 homes run $280-$550 per section, depending on accessibility and length. Duct Repair & Sealing covers our repair philosophy.
Do San Lorenzo’s older homes really need duct sealing, or is it just upsell?
Yes, they genuinely need it. The original duct systems in San Lorenzo’s 70-80-year-old Bohannon tract homes were built with materials that have exceeded their service life, and marine layer moisture has accelerated deterioration that would have taken decades longer in drier climates. We camera-inspect every system before recommending sealing, and we show you the footage so you can see the gaps and corrosion yourself. Call (855) 401-6006 for a free inspection.
Air Quality & Sanitizing in San Lorenzo
Air duct sanitizing in San Lorenzo typically runs $280-$520 for a whole-home treatment, with most jobs scheduled within 24-48 hours and completed in a single visit. If your Bohannon-era home on the East Bay flatlands has never had its ducts professionally cleaned, you’re likely living with decades of accumulated debris plus layered ash from recent wildfire seasons.
Mold Treatment
San Lorenzo’s position on the bay flatlands puts it directly in the path of persistent marine-layer moisture. That humidity seeps into aging duct systems through gaps in corroded seams and cracked flex connections, creating conditions where mold colonies thrive in dark crawlspaces. Standard filter changes won’t reach it. We treat mold at the source with EPA-registered sanitizers and apply mold-inhibiting coatings to help prevent regrowth in these chronically damp environments. Mold treatment with coating in a standard ranch home runs $340-$620.
Odor Removal
That musty smell after fog season lifts? It’s not your imagination, and it’s not coming from your walls. San Lorenzo’s marine layer pushes moisture through unsealed duct joints; when it recedes, you’re left with the odor of microbial growth inside your ventilation system. We locate the source with camera inspection, remove the contaminated material, and apply targeted odor-neutralizing treatment. Standalone odor removal runs $220-$420, though we often bundle it with cleaning. Air Quality & Sanitizing details our treatment options.
Do San Lorenzo’s older Bohannon homes need more frequent air duct sanitizing?
Yes. The 70-80-year-old duct systems in ZIP 94580 accumulate debris faster than newer homes, and the combination of coastal humidity infiltration and wildfire ash creates a contamination profile that standard maintenance intervals don’t address. We typically recommend sanitizing every 3-4 years for these homes, compared to 5-7 years for newer construction with sealed duct systems. Call (855) 401-6006 to schedule a camera inspection.
Brands We Service in San Lorenzo
We clean with Rotobrush agitation systems, Nikro HEPA extraction equipment, and Abatement Technologies containment tools, the same professional-grade brands HVAC contractors specify. Our trucks carry common parts for these systems, so most San Lorenzo jobs finish in one visit without waiting on orders. our brands
Pricing for Air Duct Cleaning in San Lorenzo, CA
| Service | Typical range in San Lorenzo |
|---|---|
| Basic residential duct cleaning (single system, up to 10 vents) | $350-$550 |
| Full system cleaning with video inspection | $550-$750 |
| Dryer vent cleaning (standard single-story ranch) | $149-$219 |
| Dryer vent cleaning with deep ash/moisture removal | $189-$289 |
| Full HVAC system cleaning (ducts, coils, blower) | $280-$650 |
| Evaporator coil cleaning only | $180-$320 |
| Whole-system duct sealing | $800-$1,400 |
| Single section flex duct repair | $280-$550 |
| Whole-home duct sanitizing | $280-$520 |
| Mold treatment with coating | $340-$620 |
What pushes San Lorenzo jobs toward the higher end: the age of Bohannon-era ductwork often reveals corrosion or leaks needing sealing first, homes near the bay flatlands show more moisture damage and mold than inland properties, and wildfire ash accumulation requires additional agitation cycles. We disclose the full price before starting work. The number we quote on the phone is the number on your invoice.
Neighborhoods We Serve in San Lorenzo
We work throughout ZIP 94580, with most calls coming from these areas. Typical response time is same-day or next-day for standard appointments, with emergency calls prioritized.
- Broadmoor
- Washington Manor
- San Lorenzo Village (original Bohannon tracts)
- Hesperian Corridor
Service Area - Cities Near San Lorenzo
Our crews serve San Lorenzo, CA locally from the San Francisco Bay Area dispatch office, with regular routes through neighboring communities. We also work in Ashland, CA to the north, San Leandro, CA along the bay shoreline, Cherryland, CA adjacent to San Lorenzo’s eastern border, Castro Valley, CA to the east in the hills, and Fairview, CA to the southeast. Scheduling is coordinated from our metro office; crews arrive with the equipment and parts needed for most jobs in one trip.
Serving San Lorenzo, CA - Our Local Coverage Area
Bellows Air Duct & Vent Co. of California crews serve San Lorenzo and the communities around it; dispatch is coordinated from our San Francisco Bay Area office. The map shows the San Lorenzo coverage area; if your address is on it, we can help.
Also serving nearby: San Lorenzo, CA, Ashland, CA, San Leandro, CA, Cherryland, CA, Castro Valley, CA, Fairview, CA.
FAQs About Air Duct Cleaning in San Lorenzo
Most residential duct cleaning and sealing work in San Lorenzo does not require a permit, but extensive duct replacement or modifications to the HVAC plenum may need Alameda County review. We handle permit determination as part of our upfront assessment and will tell you before work begins if your specific job requires filing. Our $89 Seasonal Tune-Up includes a system evaluation that flags any permit-triggering scope.
Standard appointments in ZIP 94580 are typically available same-day or next-day, with emergency calls prioritized based on technician location and job severity. We dispatch from the San Francisco Bay Area office, and our crews carry Rotobrush, Nikro, and Abatement Technologies equipment on every truck to complete most jobs in a single visit. Call (855) 401-6006 to check today’s availability.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Lorenzo Customers Say
"Two guys, about three hours, plastic down at every register, and they wiped the vent covers before putting them back."
- Grace Chen"The job was done well and the house smells better. There was some dust knocked loose around a couple of the registers that I had to wipe down afterward."
- Jodi Ackerman"Booked online at nine at night, got a confirmation, a reminder, and a call when they were fifteen minutes out."
- Renee Fletcher