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.
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AfterFast, Reliable HVAC Cleaning Across South San Francisco
HVAC cleaning in South San Francisco isn’t a seasonal luxury. It’s a response to a specific set of conditions: daily marine fog, salt-laden air, and a housing stock where many duct systems date back to the Truman administration. At CleanRun Air Duct Cleaning, we’ve spent years working inside SSF’s crawlspaces, attics, and mechanical closets, documenting what actually accumulates in duct runs here. The answer, consistently: moisture-driven microbial growth, decades of fine particulates, and joints that leak conditioned air into the dirt. If your system hasn’t been opened and inspected in the last five years, call us at (806) 606-6902. We’ll give you a written price before a single panel comes off.
Why CleanRun Air Duct Cleaning Is South San Francisco’s Preferred HVAC Cleaning Company
We earn work in South San Francisco by showing homeowners what’s inside their ducts, not by describing how dirty ducts feel. Every job we’ve done here since 2013 has ended the same way: a documented photo record of every duct run, before and after, delivered as a standard part of the job file. That’s not a marketing promise. It’s Haven Standard Clause 2, in writing, on every invoice.
Our crews know the difference between a 1950s ranch off El Camino Real with original galvanized ductwork and a 1990s track home up in Westborough with flex duct. Those systems fail differently, and they need different cleaning approaches. We also know which homes off Grand Avenue sit close enough to the biotech corridor to justify stricter containment protocols. Tomas Reyes, who leads our South San Francisco work, insists on one rule above all others: the written price comes before any work starts, every time. No exceptions. That’s Haven Standard Clause 1.
Local homeowners respond to that. Not because it’s friendly, but because it’s rare. We’ve done over 52,000 homes this way, and the 365-Day Done Right Promise backs every single one. If the work isn’t right, we make it right, in writing, not subject to a manager’s mood.
Our HVAC Cleaning Services in South San Francisco
Evaporator Coil Cleaning
The evaporator coil sits inside your air handler and is where cold refrigerant absorbs heat from your home’s air. In South San Francisco, coastal humidity means these coils stay damp longer than they do inland. That dampness collects dust, and the dust becomes a paste that insulates the coil and kills efficiency. A typical evaporator coil cleaning in South San Francisco runs $180-$340, depending on access. We photograph the coil before and after. You’ll see the difference in the photo record, not just in our summary.
Air Handler Cleaning
The air handler is the box that houses the blower, the evaporator coil, and often the filter. In mid-century SSF homes, air handlers are frequently installed in garages or utility closets that draw in whatever the fog leaves at the door. We clean the cabinet interior, the blower housing, the coil, and the drain pan. A full air handler cleaning here typically runs $250-$450. If the blower wheel is caked, we use agitation tools and HEPA-filtered negative pressure, the same method we use on duct runs. This is where the real fog-driven contamination accumulates, and a fogging treatment won’t touch it.
Condenser Cleaning
Your outside condenser unit inhales whatever the wind carries. In South San Francisco, that includes salt spray, eucalyptus debris, and fine dust from the city’s industrial corridors. We clean the condenser fins, straighten them when they’re bent, and clear the coil. Typical condenser cleaning in SSF runs $120-$220. On units near East Grand Avenue, we often find salt corrosion that’s accelerated fin deterioration. We’ll tell you honestly if the coil is nearing replacement, and we’ll show you photos so you can verify it yourself.
Coil Treatment
After the coil is clean, we apply a treatment that slows future buildup. In South San Francisco’s persistent humidity, this step matters more than it does in drier parts of the Bay Area. The treatment isn’t a substitute for cleaning. It extends the interval between them. Coil treatment adds $60-$120 to a cleaning, and we’ll explain exactly what’s in the product before we apply it. We don’t sell mystery chemicals.
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.
BeforeAfterTrusted Brands We Service in South San Francisco
We work on equipment from every major manufacturer, and we stock parts locally for South San Francisco customers. Our cleaning equipment comes from trade-recognized brands like Rotobrush, Nikro, and Guardsman, all of which you can look up independently before we arrive. We don’t use shop-vacs. We don’t use hardware-store attachments. The tools we run are the same professional-grade equipment used in commercial and industrial cleaning, and the Neglected blower wheels, caked evaporator coils, and salt-corroded condenser fins don’t respond to a household vacuum. If you want to verify what we’ll use, ask. We’ll name the tool, the model, and the reason before the truck pulls up.
Common HVAC Cleaning Problems We See in South San Francisco Homes
- Crawlspace duct contamination. Many of the 1940s-1960s homes in South San Francisco run supply ducts through crawlspaces. Cool, damp ground air condenses inside poorly sealed joints, and that moisture feeds mold and mildew. A rooftop unit cleaning misses this entirely. So does a fogging treatment. The duct runs have to be inspected with a camera, cleaned, and resealed.
- Persistent musty odor that returns after “sanitizing.” A fogging sanitizer kills surface microbes briefly. But if the biomass remains inside the duct, the moisture from daily marine fog reactivates growth within weeks. We remove the biomass first. That’s the difference between source removal and a temporary smell change.
- Galvanized duct systems with failed joints. Original 1950s galvanized ducts in SSF were never sealed well by modern standards. Leaky joints pull in attic or crawlspace air. We reseal after cleaning, which a duct cleaning-only contractor typically doesn’t offer. It changes how the system performs, not just how it looks.
- Mixed-use buildings near the biotech corridor. Commercial buildings along East Grand Avenue and in Lindenville often serve both office and lab or clean-room-adjacent spaces. Residential cleaning protocols aren’t sufficient there. These buildings need NADCA-standard documentation and containment. We provide that, and we document it in writing.
Pricing for HVAC Cleaning in South San Francisco, CA
Here are honest, written ranges for South San Francisco’s market. These are not teaser prices. They’re the numbers we quote before work starts, and they don’t change once we’re on site.
| Service | Typical Range in South San Francisco |
|---|---|
| Air handler cleaning | $250-$450 |
| Evaporator coil cleaning | $180-$340 |
| Condenser cleaning | $120-$220 |
| Coil treatment (add-on) | $60-$120 |
| Full HVAC cleaning (air handler + evaporator + condenser) | $500-$850 |
What affects the price: access, system age, whether crawlspace duct runs need resealing, and whether the building requires commercial-grade containment. We write the number down before any work begins. If a competitor’s estimate comes in lower, bring it to us. We’ll put our own number next to it in writing, free of charge. That’s the Free Second Opinion, and it’s available to every South San Francisco homeowner.
The climate in South San Francisco is the reason this work matters here more than in most Bay Area cities. Cold marine air funnels through the gap between San Bruno Mountain and the bay every afternoon, pushing dampness into homes from Lindenville to Serra Highlands. Older homes absorb that moisture. Their ducts do too. A genuine HVAC cleaning removes the accumulated material. A fogging sanitizer just wets it again. If you want a written price for your specific system, call (806) 606-6902.
We Also Serve Cities Near South San Francisco
Our crews work throughout the northern peninsula, including South San Francisco, Daly City, San Bruno, Millbrae, and Pacifica. Each city has its own microclimate and housing stock. We adjust our approach accordingly. If you’re in one of those cities, the same written-price policy and documented photo record apply.
Serving South San Francisco, CA - Our Local Coverage Area
We’re based in the South San Francisco 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 South San Francisco
South San Francisco sits at a geographic pinch point where cold, wet marine air is funneled off the bay and over the peninsula every day. That keeps indoor relative humidity consistently higher than in cities just a few miles south. Damp duct surfaces are exactly where mold colonizes, especially in the crawlspace-run ducts common to SSF’s mid-century homes. If you smell must, the duct runs themselves need inspection, not just the registers. Call (806) 606-6902 and we’ll schedule it.
No. Fogging addresses surface microbes only. If you don’t first remove the microbial biomass inside the duct runs through source removal, daily marine fog moisture reactivates the growth within weeks. We see this constantly in South San Francisco homes. Some companies sell fogging as a standalone service. We won’t, because we know it doesn’t hold up here.
Yes. Buildings in the Lindenville and East Grand Avenue biotech corridor often mix office space with lab or clean-room-adjacent space. Those systems require NADCA-standard documentation and containment protocols that a typical residential crew isn’t equipped for. We provide both. If you manage a mixed-use building in this part of South San Francisco, we can walk you through the documentation before any work starts.
Every three to five years, depending on the condition of your ductwork and whether your system has been resealed. Homes with original galvanized ducts and crawlspace runs tend to accumulate contamination faster. If you’ve never had the ducts inspected with a camera, do that first. It tells you what you’re working with, and we include the photo record so you can see it too.
Yes, if the smell is coming from microbial growth inside the duct runs. We cleaned a 1950s ranch off East Grand Avenue where the original galvanized ducts had never been serviced. Camera inspection showed a heavy microbial bloom. We removed it with HEPA-filtered negative pressure and agitation, cleaned the air handler and evaporator coil, then resealed the joints. The smell didn’t return. A fogging-only treatment would not have achieved that. Call us at (806) 606-6902 for an exact quote. Estimates are free, and the price is written before work starts.
Written by Tomas Reyes, owner at CleanRun Air Duct Cleaning, providing documented HVAC cleaning across South San Francisco since 2013.