Fast, Reliable HVAC Cleaning Across 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 East Bay dispatch, and our crew is usually on-site in San Lorenzo within 60-90 minutes of your call.
We’ve been working in San Lorenzo since the mid-1980s, long enough to know the Bohannon tracts by their floor plans. The ranch homes on Via Alamosa, the minimal-traditionals along Lewelling Boulevard, the post-war cottages near San Lorenzo Park - we’ve cleaned ducts in all of them. These houses were built fast and built alike, which means we know what we’ll find before we open the crawlspace hatch: original galvanized ductwork, brittle flex connections, and seventy-plus years of accumulated debris that no homeowner vacuum can reach. If you’re smelling musty air or watching your energy bills climb in a home that’s older than most of its neighbors’ parents, call us at (855) 401-6006. We’ll show you exactly what’s inside your ducts before we touch a thing.
Why Bellows Air Duct & Vent Co. of California Is San Lorenzo’s Preferred HVAC Cleaning Company
San Lorenzo homeowners don’t call us for coupons. They call us because their last cleaner left a mess, or because they watched a camera inspection from another company and still couldn’t see the full picture. We’ve built our reputation in the East Bay on showing everything - the before, the after, and the problem spots in between.
Our HVAC Cleaning team carries the same equipment the commercial contractors specify: Rotobrush agitation systems, Nikro HEPA vacuums, and Honeywell filtration hardware. More importantly, our technicians are background-checked, uniformed, and trained specifically on the failure modes of post-war residential ductwork. They know when a corroded galvanized joint will hold and when it needs replacement. They know that brittle 1950s flex wrap can’t take aggressive brushing without tearing. That knowledge saves San Lorenzo homeowners from emergency callbacks.
We answer our phones with a live person, 24 hours a day. No voicemail maze, no app to download. When a crawlspace duct separates during cleaning or a coil treatment reveals a deeper mold issue, you talk to someone who can dispatch help immediately. Our 90-Day Done Right Promise covers every job in San Lorenzo: if the work isn’t right, we return at no charge with no paperwork required. We’ve honored that promise for over 42 years.
Our HVAC Cleaning Services in San Lorenzo
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 the 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 - corrosion failures are common after seventy years of standing water.
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 on Via Granada and the streets near Bockman Park.
Condenser Cleaning
Your outdoor condenser coil faces the bay winds directly. Salt air and particulate from the Nimitz corridor coat the fins, reducing heat rejection and forcing longer run times. Condenser cleaning in San Lorenzo runs $120-$200 for standard residential units. We straighten damaged fins, clean with foaming agent, and verify subcooling and superheat readings to confirm the system is working within spec. For units located against fence lines where Bohannon homes pack tight lots, we also clear debris from the base pan that blocks drainage.
Air Handler Cleaning
The air handler is the heart of your forced-air system, and in San Lorenzo’s post-war homes it’s often a closet-mounted relic with a rusted drain pan and deteriorated internal insulation. Full air handler cleaning - cabinet, coils, blower, and drain system - typically runs $320-$480. We camera-inspect the interior before and after, documenting the condition of the heat exchanger on gas furnaces and the condition of electric heat strips. Many San Lorenzo handlers we encounter have never been opened since installation in 1948 or 1952. The debris accumulation can be startling.
Coil Treatment
San Lorenzo’s persistent humidity makes coil treatment essential, not optional. After mechanical cleaning, we apply an EPA-registered antimicrobial treatment to evaporator coils and drain pans, inhibiting mold regrowth for the full cooling season. Coil treatment adds $85-$140 to a cleaning service. For homes with documented mold issues or occupants with respiratory sensitivity, we also offer full duct sanitizing with an Abatement Technologies fogging system. The marine layer won’t stop, but treated coils resist the microbial bloom that untreated coils develop within weeks.
Heat Exchanger Cleaning
Gas furnace heat exchangers in San Lorenzo’s older homes require careful inspection and cleaning. Decades of combustion byproducts coat the surfaces, reducing efficiency and potentially creating hazardous conditions. Heat exchanger cleaning runs $200-$350, always including visual inspection for cracks or deterioration. We document findings with camera imagery. If the exchanger has failed, we provide a written second opinion on any replacement estimate you’ve received - that service is free.
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 Lorenzo
We maintain cleaning equipment and replacement parts from Nikro, Honeywell, and Aprilaire - the same brands your original installer might have specified if they’d known the system would run seventy years. Our vans carry flex duct sections, mastic sealant, and corrosion-resistant hardware sized for the smaller-diameter ductwork common in Bohannon tracts. When we find a failed component during cleaning, we can usually replace it same-day rather than ordering parts and rescheduling. San Lorenzo homeowners don’t need another appointment. They need the job finished.
Common HVAC Cleaning Problems We See in San Lorenzo Homes
- Wildfire ash strata in original ductwork. The 2020 fire season left a visible signature in San Lorenzo’s unsealed ducts: fine ash layered over decades of household dust, creating a dark, compacted deposit that standard vacuuming won’t dislodge. We use Rotobrush agitation with HEPA source removal, then verify cleanliness with camera inspection.
- Marine-layer moisture infiltration through corroded crawlspace joints. San Lorenzo’s flatland location exposes crawlspace ductwork to higher ambient humidity than inland East Bay cities. Cracked joints and failed insulation wrap allow moisture to enter, promoting mold that reappears within weeks if the source isn’t sealed. Our protocol includes joint repair and antimicrobial treatment, not just surface cleaning.
- Brittle flex duct connections that separate under cleaning. The early flex duct used in Bohannon tracts has insulation wrap that turns brittle after seven decades. Aggressive brushing can tear connections loose, causing sudden airflow loss. Our technicians test flexibility before selecting brush stiffness, and we carry replacement sections for immediate repair when needed.
- Clogged condensate drains from decades of biofilm accumulation. Air handler drain pans and lines in San Lorenzo’s older homes often contain thick biofilm that standard wet-vac clearing won’t remove. We use nitrogen purging and enzymatic treatment to restore full drainage, preventing the overflow that damages ceilings and promotes mold growth in handler cabinets.
Pricing for HVAC Cleaning in San Lorenzo, CA
| Service | Typical Range in San Lorenzo |
|---|---|
| Full system HVAC cleaning (ducts, coils, blower) | $280-$650 |
| Evaporator coil cleaning only | $180-$320 |
| Blower cleaning only | $150-$260 |
| Condenser cleaning only | $120-$200 |
| Air handler cleaning (full cabinet) | $320-$480 |
| Coil antimicrobial treatment | $85-$140 |
| Heat exchanger cleaning with inspection | $200-$350 |
| Duct sanitizing (whole system) | $180-$340 |
What moves a job toward the higher end: extensive wildfire ash removal requiring multiple agitation passes, mold remediation with EPA-registered biocide, replacement of failed flex sections or corroded fittings, and systems that haven’t been cleaned in twenty-plus years. We disclose the full price before starting work - the number we quote on the phone is the number on your invoice. No bait coupons, no upsells at the door. Seniors and veterans receive a permanent 5% discount. Our $89 Seasonal Tune-Up is also available for systems that need inspection before committing to full cleaning.
Call (855) 401-6006 for a free estimate. We’ll ask about your home’s age, any musty odors or airflow issues, and whether you’ve noticed odors since the 2020 fire season. That conversation helps us bring the right equipment and the right technician for your specific situation.
We Also Serve Cities Near San Lorenzo
Our East Bay crews work daily in San Lorenzo and the surrounding communities: Ashland, San Leandro, Cherryland, and Castro Valley. The same Bohannon-era housing stock extends into Cherryland and parts of Ashland, so our specialized experience with post-war ductwork serves homeowners across this corridor. If you’re unsure whether your address falls in our service area, call and we’ll confirm immediately.
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 - HVAC Cleaning in San Lorenzo
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 the corroded joints allow recontamination even after thorough cleaning. Call (855) 401-6006 and we’ll assess your specific system age and condition.
Mechanical agitation and HEPA vacuuming remove the visible ash and particulate, but odor elimination requires additional treatment. We apply an EPA-registered deodorizing agent after source removal, and for persistent odors we recommend full duct sanitizing with thermal fogging. The 2020 fire season left particularly stubborn deposits in San Lorenzo’s poorly sealed crawlspace ducts. Camera inspection before and after confirms whether odor sources have been eliminated.
It is safe when the technician first tests the duct’s structural integrity and selects appropriate brush stiffness. We inspect flex connections for brittle insulation wrap and corroded collars before inserting any mechanical agitation tool. When we encounter deteriorated sections - common in San Lorenzo’s original Bohannon ductwork - we repair or replace them before proceeding. Our crew carries replacement flex sections and mastic sealant for exactly this scenario.
San Lorenzo sits on the East Bay flatlands directly adjacent to San Francisco Bay, placing it in the path of the daily marine layer. This produces consistently higher ambient humidity than inland East Bay cities like Livermore or Pleasanton. That moisture infiltrates aging duct systems through gaps and corroded seams, especially in crawlspace runs close to the flatland grade. Livermore’s greater distance from the bay and its valley location create drier conditions that don’t produce the same moisture-driven mold issues.
We access crawlspace ductwork through existing entry points, using flexible shafts with camera guidance to navigate the full run. Every foot is inspected and cleaned with remote-controlled agitation tools and HEPA vacuum extraction. After cleaning, we camera-verify the entire length and seal any accessible joints with mastic. For San Lorenzo’s Bohannon-era homes with extensive crawlspace routing, this process typically adds 60-90 minutes to the job but ensures no section is left untreated.
Ready to see what’s inside your ducts? Call Bellows Air Duct & Vent Co. of California at (855) 401-6006 for a free estimate. We’ll schedule a time that works, show up when we say, and give you an honest price before we start. No bait, no surprises, no paperwork if something needs fixing - just the job done right, backed in writing for 90 days.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving San Lorenzo since 1984.