Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Before
After
Before
After
Before
AfterFast, Reliable HVAC Cleaning Across San Lorenzo
HVAC cleaning in San Lorenzo usually means one thing: a 65-to-75-year-old duct system pulling fog-season moisture and crawl-space soil into your supply air. CleanRun Air Duct Cleaning has worked these Bohannon-era floor plans long enough to know what we’ll find before the first panel comes off. We write the price down, we photograph every duct run before and after, and we hand you the record when the truck leaves. If you’re noticing dust on registers, musty air at startup, or uneven airflow between rooms, call (806) 606-6902 and we’ll schedule a written estimate.
Key Takeaways
- Most San Lorenzo homes share a near-identical duct layout from the 1944-1955 Bohannon building wave, which makes failures predictable and diagnosis faster.
- Fog moisture wicks into unsealed crawl-space duct joints here, feeding mold colonies that DIY fogging treatments don’t remove at the source.
- A full HVAC clean in San Lorenzo typically runs $425-$640 for the air handler, evaporator coil, and blower, depending on access and buildup.
- Every CleanRun job includes a written price before work starts and a documented photo record of every duct run after we finish.
Why CleanRun Air Duct Cleaning Is San Lorenzo’s Preferred HVAC Cleaning Company
We’re not the biggest outfit in Alameda County and we don’t chase volume. What we do is show up with a camera, a written scope, and equipment our customers can look up by name. Tomas Reyes, who runs our crews, built the company in 2013 on a simple rule: if the inside of the duct isn’t photographed before and after, the job isn’t done. That practice applies to every HVAC Cleaning visit in San Lorenzo.
San Lorenzo homeowners tend to ask the same three questions: what did you find, what did you remove, and what does the duct look like now. We answer all three with photos, not adjectives. The 365-Day Done Right Promise backs the work in writing. If something isn’t right, we make it right, no manager-approval theater. That’s Haven Standard Clause 1, and it applies to every job we do in San Lorenzo.
We work throughout San Lorenzo: the grid streets off Bockman Road, the blocks around Hesperian Boulevard, the homes near San Lorenzo High and the Village. Scheduling is coordinated from our San Francisco Bay Area office; crews serve San Lorenzo directly. You’ll get a written price before any work begins, and the technician who arrives will be uniformed, background-checked, and identified by name.
BeforeAfterOur HVAC Cleaning Services in San Lorenzo
We clean the full air path, not just the visible register. In a Bohannon rancher, that usually means working through a tight utility closet, into a low crawl space, and around sheet-metal trunk lines that haven’t moved in seventy years. These are the services San Lorenzo homeowners call us for most often.
Evaporator Coil Cleaning
In San Lorenzo’s marine air, evaporator coils pick up a film of fog-condensed dust and biological growth faster than inland systems do. When the coil’s face loads up, airflow drops, cooling capacity drops, and the blower works harder against the restriction. We clean coils with a combination of mechanical removal and professional-grade coil treatment, not just a chemical rinse. A typical evaporator coil clean in San Lorenzo runs $185-$325 when paired with a full air handler service.
Blower Cleaning
Bohannon-era systems often run original or early-replacement blower wheels that have accumulated a decade or more of fine particulate. A loaded blower wheel doesn’t just move less air; it throws dust back into the supply stream after you’ve paid someone to clean the ducts. We pull the blower assembly, clean the wheel and housing, and verify balance before reinstalling. Blower cleaning in San Lorenzo typically runs $140-$220 on its own, less as part of a full-system clean.
Condenser Cleaning
The outdoor condenser in San Lorenzo sits in fog, salt-tinged air, and whatever pollen the Hayward hills send through the gaps. Coils here develop a stubborn film that reduces heat rejection and drives up runtime. We remove the cabinet top, clean the coil with low-pressure water and appropriate cleaners, and clear debris from the fins. Expect to pay $160-$260 for a proper condenser clean, including inspection of the refrigerant lines and electrical connections.
Air Handler Cleaning
Most San Lorenzo air handlers hide in a hallway closet or a garage corner, and they rarely get opened until airflow collapses. We service the entire air handler: blower, motor, drain pan, evaporator coil, and the interior insulation surfaces. On a Bohannon home, we also check for return-air leaks at the cabinet joint, which is a common source of the crawl-space odor that comes through the registers. Air handler cleaning in San Lorenzo ranges from $240-$380 depending on cabinet access and the condition of components.
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
We work on every major HVAC brand you’ll find in San Lorenzo homes: Carrier, Bryant, Rheem, Trane, Lennox, Goodman, York, American Standard, and older systems that no longer have a visible nameplate. For cleaning equipment, our crews run Rotobrush and Nikro systems with HEPA filtration and true negative-pressure extraction. We also carry Abatement Technologies filters and Guardsman sanitizing treatments for customers who want documented antimicrobial protection after source removal is complete. If you’re comparing companies, ask what equipment they use. Ours is on the estimate.
Common HVAC Cleaning Problems We See in San Lorenzo Homes
- Fog-fed mold behind registers. Marine moisture wicks through unsealed crawl-space duct joints during San Lorenzo’s long, humid winter season. The result is visible mold colonization inside supply boots and on register surfaces, even in homes where the occupants are meticulous about filters.
- Disconnected or collapsed flex branches. Sixty-plus years of settling has pulled apart original flex sections in thousands of Bohannon crawl spaces. When a branch separates, the system pulls unfiltered crawl-space air straight into the living space, which is why some San Lorenzo rooms have far more dust than others.
- Undersized return-air boxes. The original Bohannon return was adequate for a 1950s furnace but not for modern blowers and higher-MERV filters. That restriction starves the system, drops static pressure, and makes every duct imperfection louder and more visible.
- Ineffective fogging treatments from previous calls. We regularly see San Lorenzo homes where a previous company fogged the ducts but left the moisture source and the particulate load untouched. The customer paid for mold treatment, and the mold came back within six months because the wet, dirty source material was never removed.
Pricing for HVAC Cleaning in San Lorenzo, CA
A full HVAC cleaning in San Lorenzo (air handler, evaporator coil, blower, and accessible duct runs on a typical Bohannon rancher) runs $425-$640. Homes with severely contaminated ducts, collapsed branches needing reconnection, or mold colonies requiring documented remediation treatment run higher, and we’ll write that number down before we touch anything. Partial services run less: $185-$325 for an evaporator coil clean alone, $140-$220 for a blower cleaning, $160-$260 for condenser cleaning. What affects your price in San Lorenzo: crawl-space access height, the number of disconnected joints we find, and whether the air handler sits in a closet or a crawl space. Call (806) 606-6902 for a written quote; the estimate is free and it holds.
| Service | Typical San Lorenzo Range |
|---|---|
| Full HVAC Cleaning (air handler, coil, blower, ducts) | $425 - $640 |
| Evaporator Coil Cleaning (paired with air handler) | $185 - $325 |
| Blower Cleaning (standalone) | $140 - $220 |
| Condenser Cleaning | $160 - $260 |
| Air Handler Cleaning (standalone) | $240 - $380 |
Again: this is the written number, this is what it costs, no per-vent arithmetic and no coupon that doubles once the van arrives. Bring a competitor’s written estimate and we’ll put our number next to it. That’s a Free Second Opinion, and it’s part of how we work.
We Also Serve Cities Near San Lorenzo
Our San Lorenzo crews regularly work the neighboring communities of Castro Valley, San Leandro, Union City, and Oakland. If you have family across the line or a rental property a few exits away, the same written pricing and documented photo record apply. One number, one standard, everywhere we go.
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
Because the original sheet-metal ducts in Bohannon homes were routed through low, unsealed crawl spaces and never vapor-sealed at the joints. San Lorenzo’s fog season pushes ground-level moisture into those joints every winter, and the duct surface stays damp long enough for mold to establish. Newer Hayward construction generally has better crawl-space separation and sealed duct systems, which delays the same problem by years. The fix isn’t just cleaning; it’s sealing the joints after source removal so the moisture stops feeding regrowth.
No. Fogging kills surface microbes but does not remove the damp particulate mass they’re feeding on, and in a San Lorenzo crawl space, that particulate is usually a mix of fog-condensed dust, rodent debris, and decades of soil infiltration. If the mold source remains, the colony returns in months. Source removal, mechanical cleaning, and joint sealing address the condition. We can apply a Guardsman antimicrobial after the source removal if you want documented residual protection, but we’ll tell you plainly: fogging alone is an upsell that won’t last in a Bohannon crawl space.
Yes. The register boot connections in Bohannon-era supply runs were mechanically fastened and relied on a friction fit that weakens after sixty-plus years of settling. When one boot separates, that register pulls air from the crawl space and delivers it to the bedroom. We find this on a substantial share of pre-1956 homes in San Lorenzo that have never had their ducts inspected. The repair is straightforward: reseat the boot, seal the joint, and test the airflow at each register. We’ll show you the photo of the disconnected boot before we fix it.
Most of the time, yes. We work through the blower access panel and the coil cabinet door, which is tight but doable in typical Bohannon closet installations. We use a combination of compressed air, brushing, and coil-specific cleaners to remove buildup without disassembling the line set or disconnecting refrigerant. If access is so confined that we can’t properly clean the coil in place, we’ll tell you that in the written estimate and include the removal cost upfront, not as a surprise after the panel is off.
Every 3 to 5 years is a reasonable interval for a San Lorenzo system, and homes in the lowest, foggiest pockets of the CDP may need it more often. The deciding factors are whether your crawl space stays damp, whether your joints have been sealed, and whether you have pets or old carpeting loading the return air with particulate. Inland cities like Union City or Castro Valley can sometimes go longer between cleanings, but the marine moisture here compresses that window. If your registers show dust streaking or the air smells musty at startup, schedule an inspection before the problem moves into the coil and blower.
Call (806) 606-6902 for a written estimate. We’ll tell you what’s in your ducts, what it costs to remove, and what the inside looks like when we’re done. You’ll have the photos to prove it.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning, serving San Lorenzo since 2013.
HVAC Cleaning in Nearby Areas