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 Covina
Air duct cleaning in Covina typically runs $350 – $650 for a full residential system, and most jobs are scheduled within a few business days. If your Covina home was built in the 1950s through 1970s, you’re likely dealing with decades of accumulation in original ductwork that was never designed for today’s HVAC loads.
We’re Hollis Air Duct Cleaning, part of the Garrison Partners family and serving Covina from our Los Angeles office. Our crews know the San Gabriel Valley’s older housing stock inside and out. We dispatch to Covina neighborhoods from Charter Oak down to the 57 corridor, and we understand why a standard “duct cleaning” call here often turns into something more involved. The combination of postwar ranch construction, 100°F+ attic summers, and the unique dust load coming off the 57 and 10 freeways means Covina duct systems fail differently than those in newer inland-coastal suburbs. Call us at (361) 326-5060 for a free estimate, and we’ll show you exactly what your system looks like inside before we quote a price.
Why Hollis Air Duct Cleaning Is Covina’s Preferred Air Duct Cleaning Company
We’ve been in business since 2004, and our Air Duct Cleaning team has worked enough Covina homes to know the patterns. The disconnected flex runs in low-pitch attics off Citrus Avenue. The crushed trunk lines behind floor registers in the Covina Park area. The mastic seals baked to dust in Charter Oak ranch homes. This isn’t guesswork for us anymore.
Every Hollis technician is background-checked and uniformed, and we send the same standards to Covina that we apply everywhere under The Garrison Standard: arrive inside the quoted window, price the job in writing before touching equipment, complete the work by the book, and leave the site clean. Our 365-Day Done Right Promise covers every job in writing. If the work fails within a year, we return and make it right at no charge, including a free second visit. No negotiation, no runaround.
Phones are answered by a live person 24 hours a day, 7 days a week. Dispatch and scheduling are coordinated from our Los Angeles office, but the crew that arrives at your Covina door knows your neighborhood’s housing stock and your attic’s likely condition before they step inside.
Vent Cleaning in Covina
Vent Cleaning in Covina addresses the supply and return registers where conditioned air enters your rooms and where household air gets drawn back into the system. In Covina’s 1950s-70s ranch homes, these vents are often the only visible part of a duct network that’s failing upstream in the attic. We remove each register, clean the boot and adjacent ductwork with a rotary brush system, and HEPA-vacuum debris under negative pressure. A typical vent cleaning as part of a full system service in Covina runs $150 – $300 for register-level work, or it’s included in a whole-system quote of $350 – $650.
Supply Vent Cleaning
Supply vents push cooled or heated air into your living spaces. In Covina homes near the 57 freeway, we regularly find these coated with a fine black film that’s part house dust, part brake and tire particulate from traffic below. Our Rotobrush rotary system scrubs this buildup loose while a Nikro negative-air machine pulls it out of your home entirely, not just deeper into the duct.
Return Vent and Boot Sealing
Return vents are where your system inhales. In postwar Covina ranches, the floor-register boots often no longer seal to the subfloor. That gap pulls San Gabriel Valley dust and 57/10 freeway grit straight into your supply side every time the blower runs. We clean the return boot, then seal it properly so the air moving through your system is the air inside your home, not your crawl space or wall cavity.
Air Duct Repair in Covina
Air Duct Repair in Covina is the work that actually fixes the “dusty attic” smell and the high electric bills that cleaning alone won’t touch. In this city’s 1950s-70s ranch housing, original flex duct and mastic seals have baked through decades of 100°F+ attic temperatures until they crack, disconnect, or crush. We reconnect separated runs, replace collapsed flex, seal plenums and boots with fresh mastic, and restore the duct layout so your conditioned air reaches your rooms instead of your attic. A typical duct repair in Covina runs $200 – $500 for spot repairs, or $800 – $1,800 for more extensive reconfiguration of an original system.
Flex Duct Reconnection and Support
Original flex duct in Covina attics dries out and separates at the collar. We find this constantly. Our crews reconnect the run, support it with proper strapping so it doesn’t sag or crush again, and seal the joint with mastic rated for attic temperature swings. The fix is permanent, not a patch.
Crushed Trunk Line Restoration
Low-pitch Covina attics don’t give techs much room to move. Over years, foot traffic, storage, or just gravity crushes the trunk lines that feed entire wings of the house. We replace or re-form these sections, verify airflow at each register with a digital manometer, and document the before-and-after so you see the difference.
Trusted Brands We Service in Covina
Our equipment roster includes Rotobrush rotary brush systems, Nikro negative-air machines, and filtration products from Honeywell, Aprilaire, and Abatement Technologies. These are the same tools commercial crews use in hospitals and schools, not hardware-store attachments. For Covina homeowners, that means we can source Honeywell and Aprilaire filtration upgrades locally when a cleaning reveals your system needs better protection against the San Gabriel Valley’s dust load. We stock common fittings and mastic compounds for the sheet-metal and flex duct found in Covina’s postwar housing, so most repairs don’t wait on parts. If your system needs a filtration upgrade beyond what the cleaning addresses, we’ll quote it in writing and explain exactly what the Aprilaire or Honeywell component does that your current setup doesn’t.
Common Air Duct Cleaning Problems We See in Covina Homes
- Heat-baked flex duct failure. Covina’s 100°F+ attic temperatures dry out original flex duct insulation and mastic seals until they crack. By the time you smell “dusty attic” at startup, your system is usually leaking conditioned air into the attic, not just recirculating dust. Cleaning the duct interior doesn’t fix a leak; sealing or replacement does.
- Disconnected runs from HVAC replacements. Many Covina homes have had new condensers or furnaces installed without updating the original duct layout. We regularly find flex runs left disconnected behind new equipment, with the system pulling unfiltered attic air for years. A camera inspection finds what a visual check won’t.
- Floor-register boot separation. Postwar ranch homes throughout Covina’s core have register boots that no longer seal to the subfloor. The blower motor pulls garage dust, crawl-space debris, and freeway grit straight into your supply ducts. We seal these properly after cleaning so the problem stops recurring.
- Santa Ana wind and wildfire ash loading. Covina’s fall Santa Ana events dump fine dust and ash into attic and outdoor returns. This layers onto the year-round 57/10 freeway particulate, creating a distinctly gritty buildup that inland-coastal neighbors like Glendora don’t see in the same concentration.
Pricing for Air Duct Cleaning in Covina, CA
Here’s what air duct cleaning costs in Covina’s market, based on the housing stock and access conditions we encounter:
| Service | Typical Range in Covina |
|---|---|
| Full residential system cleaning (supply + return, up to 12 vents) | $350 – $650 |
| Additional vents beyond standard count | $25 – $45 each |
| Vent cleaning only (register-level, no attic work) | $150 – $300 |
| Spot duct repair (reconnection, sealing, boot repair) | $200 – $500 |
| Extensive duct repair/reconfiguration | $800 – $1,800 |
| Video inspection with written report | $150 – $250 (credited toward work if hired) |
These are whole-system prices, not per-vent teaser rates that balloon at the door. We inspect first, write the price down, and don’t move it once work starts. The final cost depends on access conditions in your specific attic, the number of vents, and whether we find disconnected or damaged duct that needs repair before cleaning is worth doing. Call (361) 326-5060 for a free estimate. We’ll show you the camera footage and give you a written price you can compare.
We Also Serve Cities Near Covina
Our crews work throughout the San Gabriel Valley. If you’re in Azusa, West Covina, Baldwin Park, or Glendora, the same standards and pricing apply. Air Duct Cleaning in Covina is our focus here, but we dispatch to these neighboring cities regularly from our Los Angeles office.
Serving Covina, CA - Our Local Coverage Area
We’re based in the 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 Covina
Because cleaning the inside of a duct that leaks into your attic is like washing a bucket with a hole in it. Covina’s 1950s-70s ranch attics bake original flex duct and mastic seals until they crack, so your conditioned air escapes before it reaches your rooms. We seal or repair the leaks first, then clean. Call (361) 326-5060 and we’ll show you the camera evidence.
It’s a specific mix: San Gabriel Valley topsoil dust, brake and tire particulate from the 57 and 10 freeways, diesel soot, and seasonal wildfire ash from Santa Ana wind events. Covina sits downwind of these sources in a way that West Covina and Glendora don’t quite match. That grit is abrasive and harder on your blower motor than ordinary household dust. Call (361) 326-5060 for an inspection.
Yes, regularly. On a ranch home off Citrus Avenue near Covina Park, our techs ran a camera inspection and found a disconnected flex run in the low-pitch attic plus a crushed trunk line feeding two rear bedrooms. The AC had been pulling attic air for at least two summers. We reconnected and supported the flex, sealed the plenum and floor-register boots with mastic, and HEPA-vacuumed the supply and return ducts under negative pressure. The customer’s “dusty attic” odor at startup was gone the same afternoon. This pattern is common enough in Covina that we bring repair materials to every cleaning job.
No, it’s a separate service. Your dryer vent exhausts lint and moisture to the exterior; your HVAC duct system recirculates indoor air. They’re not connected. However, many Covina homeowners schedule both at once since our crew is already on site with the right equipment. Ask about bundling when you call (361) 326-5060.
We follow NADCA (National Air Duct Cleaners Association) source-removal methods: mechanical agitation with a Rotobrush rotary system, debris extraction with a Nikro negative-air machine, and HEPA filtration on the exhaust so nothing recirculates into your home. Under The Garrison Code, our technicians arrive uniformed, work inside the quoted window, price in writing before starting, and leave the site clean. Every Covina job is covered by our 365-Day Done Right Promise in writing. Call (361) 326-5060 to schedule.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Covina and the San Gabriel Valley since 2004.