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 Air Duct Cleaning Across West Covina
Air duct cleaning in West Covina typically runs $350 – $650 for a full residential system, and most jobs are scheduled within a few days of your call. Our crews serve West Covina from our Los Angeles office, dispatching background-checked, uniformed technicians to neighborhoods from South Hills to Woodside Village and the older tracts off Azusa Avenue. If you’re seeing black grit in your return registers after a Santa Ana wind event, that’s not normal dust. Call (361) 326-5060 for a free estimate and we’ll show you exactly what’s inside your ducts before any work starts.
We’ve been cleaning ducts in the San Gabriel Valley long enough to know that West Covina homes face a specific problem most LA County residents never see. The city’s position downwind of the 2014 Colby Fire burn scar means fall Santa Ana winds push measurable layers of ash and fine soot straight into HVAC returns. Coastal cities like Alhambra or Monterey Park get the marine layer instead. We get the grit. Our Air Duct Cleaning team uses source removal methods, not masking agents, because that’s what actually fixes it.
Why Hollis Air Duct Cleaning Is West Covina’s Preferred Air Duct Cleaning Company
Hollis Air Duct Cleaning has built its reputation in West Covina on The Garrison Standard: written prices before any work starts, a 365-Day Done Right Promise backed in writing, and technicians who arrive uniformed, background-checked, and on time. We’re part of the Garrison Partners family, in business since 2004, and our West Covina customers know the price we quote is the price they pay.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. When you schedule in West Covina, we arrive inside the quoted window, price the job in writing, complete it by the book, and leave the site clean. If the work fails within a year, we return and make it right at no charge, including a free second visit. That’s not a slogan. It’s written on every job.
We know the local housing stock. West Covina’s post-WWII to 1980s tract homes, many ranch-style with original galvanized or early flex duct systems, require a different approach than newer construction. Brittle duct insulation, deteriorated flex runs, and ash-caked returns are conditions we see weekly, not seasonally. Our Air Duct Cleaning in West Covina service is built around that reality.
Air Duct Inspection in West Covina
Air Duct Inspection in West Covina is the first step we recommend for any homeowner who notices reduced airflow, unusual odors, or black residue around return registers after wind events. Our technicians feed a high-resolution camera through your supply and return lines to document ash buildup, insulation deterioration, duct leaks, and obstructions. A standard video inspection in West Covina runs $150 – $250, and if you proceed with cleaning, we apply that fee toward the full service.
What We Document
The camera shows you what we see: ash layers on duct walls, fiberglass insulation shedding into the airstream, disconnected flex runs, or blockages from decades of accumulated debris. After a Santa Ana event, we often find black grit packed into the first few feet of return ductwork, especially in homes south of the 10 freeway where wind exposure is highest.
When to Schedule
Schedule an inspection if you’ve never had your ducts cleaned, if your home was built before 1980, or if you’re experiencing allergy symptoms that spike after wind events. In West Covina’s 50-70 year old housing stock, we regularly find original galvanized ducts with compromised seams that leak conditioned air into wall cavities. Finding that early saves money on energy bills and prevents bigger repairs.
Residential Air Duct Cleaning in West Covina
Residential Air Duct Cleaning in West Covina means source removal of ash, dust, and debris from your entire HVAC duct system, not a surface wipe or fragrance treatment. Our crews use Rotobrush rotary brush agitation combined with Nikro negative-air machines and HEPA filtration to pull contaminants out of the ductwork, not redistribute them. A typical single-family home in West Covina runs $350 – $650 depending on system size, duct material, and accessibility.
The Full System Approach
We clean supply ducts, return ducts, trunk lines, and the air handler cabinet. In West Covina’s older ranch homes, we pay special attention to the flex duct runs behind the air handler, where decades of vibration and heat cycling cause brittleness. Our technicians check MERV filter compatibility on Honeywell and Aprilaire systems to make sure your filtration matches what your blower motor can handle without overworking.
Post-Wildfire Cleaning
After Santa Ana wind events, standard cleaning isn’t enough. Ash particles are smaller and more abrasive than household dust. We adjust our rotary brush speed and negative-air pressure to remove adhered soot without damaging aged duct seams. Then we show you the before-and-after footage. If we find deteriorated insulation or crushed flex runs, we flag them for Duct Sealing in West Covina or repair so you’re not paying to clean ducts that should be replaced.
Trusted Brands We Service in West Covina
We stock parts and filtration products from Honeywell, Aprilaire, and Abatement Technologies for West Covina customers, which means faster turnaround when your system needs a filter upgrade or a media replacement matched to local conditions. Honeywell electronic air cleaners and Aprilaire whole-house media filters are common in the 1960s-1980s tract homes that dominate West Covina’s housing stock, and we carry the correct MERV-rated replacements so your blower motor doesn’t strain against overly restrictive filtration during Santa Ana season. Our Nikro negative-air equipment and Rotobrush rotary systems are the same tools commercial crews use, not rental-grade hardware, and our technicians explain what each piece does while it’s running in your home.
Common Air Duct Cleaning Problems We See in West Covina Homes
- Black ash accumulation after Santa Ana winds. Homes on the south and east sides of West Covina, especially near the 10 and 60 freeways, see visible spikes in black grit within days of a wind event. This isn’t ordinary dust. It’s fine particulate from the Colby Fire burn scar that slips past standard filters and embeds in duct insulation.
- Brittle galvanized and early flex duct systems. Many West Covina homes still run original ductwork from the 1960s-1970s. The galvanized steel corrodes, seams separate, and early flex duct becomes brittle and prone to tearing. Aggressive cleaning without a camera inspection first can turn a maintenance job into a contamination event.
- Fiberglass insulation shedding into the airstream. In 50-70 year old homes, deteriorated duct lining sheds fiberglass particles that bypass filters and circulate through living spaces. We find this most often in the return plenum and first few feet of trunk line, where air velocity is highest.
- Over-restrictive filters choking older blowers. Homeowners upgrade to high-MERV filters without checking system compatibility, causing blower motors to overheat and fail. We verify your Honeywell or Aprilaire filter rating against your system’s capacity and recommend the right match for West Covina’s ash-heavy conditions.
Pricing for Air Duct Cleaning in West Covina, CA
A typical full-system residential duct cleaning in West Covina runs $350 – $650. Smaller homes with straightforward access might land at the lower end. Larger homes with multiple zones, hard-to-reach attic runs, or significant ash contamination after Santa Ana events trend higher. Commercial systems start around $800 and scale with square footage and HVAC complexity.
What moves the price: duct material (galvanized steel takes longer than flex), number of supply and return vents, accessibility (crawl space versus garage air handler), and whether we find conditions requiring repair recommendations alongside cleaning. We do not charge per vent. We quote one flat price per system, agreed in writing before any work starts. No add-ons at the door. No upsells after we’re inside.
Video inspection is $150 – $250, applied to your cleaning if you proceed. Dryer vent cleaning, often bundled with duct cleaning in West Covina’s lint-heavy environment, runs $120 – $200 as an add-on. Call (361) 326-5060 for an exact quote. Estimates are free.
We Also Serve Cities Near West Covina
Our crews regularly work in West Covina and the surrounding communities: La Puente to the south, Covina to the east, Baldwin Park to the west, and Azusa to the north. If you’re in the San Gabriel Valley and seeing the same post-Santa Ana ash patterns, we apply the same inspection and cleaning protocols across the region.
Serving West Covina, CA - Our Local Coverage Area
We’re based in the West Covina 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 About Air Duct Cleaning in West Covina
West Covina sits in the San Gabriel Valley downwind of the Colby Fire burn scar, so Santa Ana winds push ash and fine soot directly into the region’s HVAC returns. Long Beach and other coastal cities get the marine layer instead, which intercepts and dampens that ash before it reaches their ductwork. Your cousin’s filters catch beach fog and pollen. Yours catch wildfire residue. Call (361) 326-5060 if you’re seeing black grit after a wind event.
No. A sanitiser fog temporarily masks odor but leaves the ash layer sitting in your supply and return ducts where it re-enters the airstream within weeks. Physical source removal with rotary brush agitation and negative-air extraction is what actually pulls the particulate out. We don’t sell fogging as a standalone service because it doesn’t solve the problem West Covina homeowners face. Call (361) 326-5060 for an inspection and we’ll show you what’s really in there.
Yes. Homes from the 1960s-1970s in West Covina typically have original galvanized steel or early flex duct systems that have become brittle after 50-70 years. We start with a camera inspection to assess duct condition before applying any mechanical agitation. Too much suction or overly aggressive rotary tools can tear seams or crush flex runs, creating new leaks that pull unconditioned attic air into your living space. Our technicians adjust technique to the material we find. Call (361) 326-5060 to schedule an inspection.
Check your return registers within 48 hours of a strong Santa Ana event. If you see black, powdery residue that smudges when touched, that’s ash, not dust. Normal household dust is gray and fibrous. Ash is darker, finer, and more acidic. We also recommend cleaning if your system has never been serviced, if you’re experiencing respiratory symptoms that spike after wind events, or if your energy bills have climbed without explanation. Call (361) 326-5060 and we’ll run a camera to confirm what you’re dealing with.
Most older West Covina systems handle MERV 8-11 comfortably during normal conditions, but Santa Ana ash events may warrant a temporary upgrade to MERV 11-13 if your blower motor can handle the static pressure. The wrong filter chokes airflow, overheats the motor, and can void equipment warranties. We check your system’s specs and recommend the correct Honeywell or Aprilaire filter rating for your specific unit. Call (361) 326-5060 and we’ll match the filter to your system, not just the season.
After a two-day Santa Ana event last October, we were called to a 1968 ranch-style home off Azusa Avenue near the 10 freeway where the homeowner had pulled a fistful of black grit from the return register. Our tech ran a camera inspection and found the original galvanized supply and return ducts lined with ash-caked insulation, so we used Rotobrush agitation tools under negative pressure with HEPA filtration to pull the source material out, then showed the homeowner the deteriorated flex run behind the air handler that needed replacing before it started leaking air into the wall cavity. The blower motor amp draw dropped back to spec after we cleared the lint pathway and confirmed the MERV rating on the Honeywell filter was correctly matched to the system.
Ready to see what’s in your ducts? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate. We’ll give you a written price before any work starts, show you camera footage of your system, and back every job with our 365-Day Done Right Promise. If it’s not done right, we make it right. That’s The Garrison Standard.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving West Covina and the San Gabriel Valley.