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 Daly City
HVAC cleaning in Daly City costs between $390 and $690 for a typical 2-3 bedroom Doelger-built home, with larger systems or heavily contaminated ductwork running $700-$950. That’s a written price you’ll see before any panel comes off, not an estimate that mutates once the crew arrives. We’ve worked inside thousands of these postwar tract homes from the Westlake district to the hills above Pacifica, and we know exactly what the fog does to a 70-year-old duct system. Call (806) 606-6902 and we’ll give you a number in writing, same day.
The marine layer that rolls over Daly City most mornings isn’t just weather. It’s a moisture source that condenses inside your ductwork every time the furnace kicks on. Original galvanized sheet-metal ducts from the 1950s don’t handle that well. We see rust at the seams, mold colonies behind the registers, and dust caked onto coils that haven’t been cleaned since the Reagan administration. That’s the work we do here, and we’ve been doing it since 2013.
Why CleanRun Air Duct Cleaning Is Daly City’s Preferred HVAC Cleaning Company
Tomas Reyes founded CleanRun in 2013 with a simple rule that became Haven Standard Clause 1: written price before any work starts. No exceptions, no “well, once we got in there we found…” revisions. Daly City homeowners appreciate that kind of directness, especially those in the Westlake Doelger tracts where a routine cleaning can uncover rusted seams and mold that a cheap shop-vac outfit would either miss or mask.
Every job in Daly City ends with a Documented Photo Record. You get photos of the inside of every duct run before and after. Not stock images. Your ducts. We photograph the plenum, the first elbow, the registers, the coil. If a technician finds a rusted seam separation pulling attic air into your supply registers, you’ll see it in the photo before we ever suggest a repair. That practice has been standard since our first job in 2013, and it’s why 52,000+ homes later, our HVAC Cleaning team still works mostly on referrals.
Daly City’s housing stock is specific and unforgiving. Henry Doelger built thousands of nearly identical stucco row houses in Westlake between 1948 and 1956, and most of them still run on their original forced-air ductwork. Our crews know these homes. They know the attic layouts, the typical register counts, the way the ducts were routed. They’ve pulled insulation out of supply runs so many times they can tell you which streets in St. Francis Heights have the worst condensation problems just by the address.
Our HVAC Cleaning Services in Daly City
Evaporator Coil Cleaning
The evaporator coil sits inside your air handler and gets wet every time the AC runs. In Daly City, it also stays wet because of the ambient humidity. That’s a mold incubator. We clean the coil with professional-grade equipment from Nikro and Abatement Technologies, removing the biofilm layer that reduces efficiency and recirculates spores through the house. A typical Westlake home’s evaporator coil has a gray sludge on it that most homeowners never see until we photograph it.
Blower Cleaning
The blower moves air through the entire system, and in older Daly City homes it’s often caked with a decade or more of dust, pet hair, and the fine particulate that the fog drags in from the ocean. A dirty blower works harder, draws more electricity, and pushes less air. We remove the blower assembly, clean the wheel and housing, and lubricate the bearings. The difference in airflow after a blower cleaning in these old Doelger systems is immediate and measurable.
Condenser Cleaning
The condenser is the outdoor unit, and in Daly City it takes a beating from salt-laden marine air. Corrosion on the fins reduces heat exchange, which means longer run times and higher PG&E bills. We clean the condenser coils with a low-pressure wash and fin comb, removing the salt crust and debris that builds up in coastal fog. If you live within a mile of the Pacific or near Lake Merced, this matters more than you’d think.
Air Handler Cleaning
The air handler is the box that houses the blower, the evaporator coil, and often the heat exchanger. In a 1950s Daly City home, it’s usually in a closet or a crawlspace, and it’s usually forgotten. We open it up, clean the interior surfaces, remove any moisture-damaged insulation, and photograph everything. This is where mold colonies hide in Westlake homes, and it’s where a basic duct-only cleaning fails. If the air handler isn’t cleaned, the ducts just re-contaminate within weeks.
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 Daly City
We work on every major residential HVAC brand, and our equipment roster includes Rotobrush, Nikro, and Abatement Technologies. We also treat coils with Guardsman and Honeywell products when the job calls for it. For Daly City homeowners, brand matters less than whether the tech actually gets into the duct runs with negative-pressure extraction and HEPA filtration. We do, on every job, and we photograph the evidence. If you’ve got a Carrier, Trane, Rheem, or a no-name unit from the 1990s, we service it the same way: documented, cleaned, and verified with photos.
Common HVAC Cleaning Problems We See in Daly City Homes
- Rusted seam separations in original 1950s ductwork. In Westlake Doelger homes, we routinely find rusted galvanized seams where decades of fog-driven condensation has collected. These gaps pull attic air, insulation particles, and marine moisture directly into the supply registers every time the furnace runs. Cleaning alone doesn’t fix this; the seams need sealing.
- Mold colonies behind registers and inside the air handler. The persistent humidity in Daly City keeps indoor surfaces damp for months at a time. Mold grows in the dark, cool environment inside the ducts and air handler, and a basic vacuum-only cleaning just masks the problem. HEPA source removal and antimicrobial coil treatment are required.
- Insulation and particulate contamination from uninsulated attics. Many Doelger homes have forced-air ducts running through uninsulated attic spaces that get cold and damp every night. The ducts pull in whatever is in that attic: fiberglass particles, dust, rodent debris. We find this on a majority of first cleanings in Westlake.
- Evaporator coils coated in biofilm. The marine layer keeps indoor humidity elevated year-round, which means coils stay wet longer and grow biological film faster. This reduces cooling efficiency and pushes allergens through the house. Coil cleaning and treatment is non-negotiable in Daly City.
Pricing for HVAC Cleaning in Daly City, CA
What affects the price? The number of supply runs, the condition of the ductwork, whether mold remediation is needed, and whether the air handler has been cleaned before. A 1950s Westlake home that’s never had its ducts touched will cost more than a 2010 build in Serramonte because there’s simply more to clean and more to photograph. We don’t do per-vent pricing. One flat price per system, agreed before work starts, under Haven Standard Clause 1. Call (806) 606-6902 for a written quote.
We Also Serve Cities Near Daly City
If you’re just over the border in South San Francisco or San Bruno, we serve those homes as well. Our crews also cover Pacifica’s coastal neighborhoods and much of San Francisco proper. But the work in Daly City is specific to its housing stock and microclimate, and our teams know which streets on the Westlake side of Junipero Serra need seam sealing and which St. Francis Heights homes have the worst attic condensation.
Serving Daly City, CA - Our Local Coverage Area
We’re based in the Daly City 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 Daly City
How often should HVAC cleaning be done in Daly City’s foggy Westlake homes?
Every 3-5 years, and more often if you have pets, allergies, or notice musty odors coming from the registers. Daly City’s persistent marine layer means moisture accumulates inside ductwork faster than in drier cities like San Bruno or Millbrae. If you’ve never had your system cleaned and you live in a Doelger home from the 1950s, do it once, document the condition, and we’ll tell you how often you actually need it based on what we find. Call (806) 606-6902 to schedule.
Does HVAC cleaning remove mold from old sheet-metal ducts in Daly City?
Yes, but only if it’s done with HEPA source removal, not a vacuum-only pass. In Daly City’s Westlake Doelger homes, mold is often embedded in the rust and condensation at the seams. We clean the full duct run with negative-pressure extraction and HEPA filtration, treat the air handler and evaporator coil with antimicrobial products, and seal the seams so mold doesn’t return. If we find significant mold, we’ll show you the before and after photos.
What is the typical condition of ductwork in a 1950s Doelger home in Daly City?
Rusted seam separations are the norm. The original galvanized sheet-metal ducts have been condensing marine moisture for 65-75 years, and the seams are usually the first place to fail. We also find crushed runs, disconnected returns, and fiberglass contamination from the uninsulated attics these ducts run through. In a recent Westlake home near Lake Merced, our camera inspection found original 1950s ducts with rusted seams pulling attic air into the supply registers. We performed full source removal, sealed the gaps, and treated the air handler and coil to stop recurring mold.
Why does HVAC cleaning in Daly City cost more than in drier neighboring cities?
Because the work is different. In San Bruno or Millbrae, cleaning is mostly dust extraction. In Daly City, the fog-driven humidity means mold remediation, coil treatment, and seam sealing are often part of the job. That’s $700-$950 for seriously contaminated systems versus $390-$690 for a clean system. We’ll show you exactly what’s in your ducts before quoting anything, in writing.
Can cleaned ducts stay clean in Daly City’s humid microclimate?
Yes, but only if the moisture source is addressed. That means sealing rusted seams, treating coils with antimicrobial products, and ensuring the air handler isn’t harboring mold. If those steps are skipped, the ducts will re-contaminate within months, especially in the foggiest parts of Westlake and St. Francis Heights. Our 365-Day Done Right Promise covers this work in writing.
Get Your Written Quote Today
You don’t have to guess what’s in your ducts. We’ll send a crew to your Daly City home, photograph the inside of every run, and give you a written price before any work begins. No exceptions, no surprises, no “we found something.” Call (806) 606-6902 and talk to a real person, any time, day or night. We serve Daly City, South San Francisco, San Bruno, Pacifica, and San Francisco from our Bay Area office.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning, serving Daly City since 2013.
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