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 Air Duct Cleaning Across Duarte
Air duct cleaning in Duarte typically runs $350 – $650 for a full residential system, with most jobs completed in a single visit. Our crews dispatch from the Los Angeles office and carry Rotobrush rotary systems and Nikro negative-air machines up the 210 corridor to Duarte properties, from the mid-century ranches near Royal Oaks Drive to the newer infill along the Gold Line. We know the foothill dust load here is different. Call (361) 326-5060 for a written estimate before any work starts.
Duarte sits right against the San Gabriel Mountains, and that geography shapes what we pull out of your ducts. It’s not the same mix you’d find in Monrovia or Baldwin Park a few miles downslope. The Santa Ana winds funnel mineral dust, oak and pine pollen, and wildfire ash down from the Angeles National Forest canyons straight into outdoor intakes and attic duct runs. We’ve cleaned systems in Duarte where the return plenum held a visible layer of fine grit that no vacuum from a hardware store would touch. That’s why our Air Duct Cleaning team brings commercial-grade agitation tools and HEPA-sealed negative-air equipment to every Duarte job, whether it’s a 1962 ranch near Mount Olive Drive or a commercial unit off Huntington Drive.
Why Hollis Air Duct Cleaning Is Duarte’s Preferred Air Duct Cleaning Company
We’ve been part of the Garrison Partners family since 2004, and the Duarte market has been in our rotation long enough that our technicians recognize the foothill dust pattern on sight. Roy Castellanos built this operation on The Garrison Standard: arrive inside the quoted window, price in writing before touching anything, and leave the site clean. That discipline matters in Duarte, where homeowners have dealt with enough no-shows and price jumps from other trades.
Our 365-Day Done Right Promise applies to every Duarte job in writing. If the work fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround. Our technicians are background-checked and uniformed, and our phones are answered by a live person 24 hours a day, 7 days a week. When you schedule Air Duct Cleaning in Duarte, you get accountability, not a mystery crew.
Commercial Air Duct Cleaning in Duarte
Commercial Air Duct Cleaning in Duarte covers office suites, retail spaces, medical clinics, and light industrial facilities where foothill dust loading combines with higher occupancy rates and more frequent HVAC cycles. A typical commercial system in Duarte runs $800 – $2,400 depending on square footage, duct complexity, and whether the building dates to the mid-century commercial stock near Huntington Drive or newer construction along the Gold Line corridor. We use Nikro negative-air machines and Rotobrush rotary agitation systems sized for commercial trunk lines, with HEPA filtration to contain the fine mineral dust and ash that standard shop vacuums would recirculate into occupied space.
System Inspection and Documentation
Every commercial job starts with a written scope and camera inspection of the supply and return trunks. We document pre-cleaning conditions so Duarte property managers have a baseline for maintenance schedules and can show tenants or inspectors exactly what was removed.
Post-Clean Verification and Scheduling
After agitation and negative-air extraction, we run a second camera pass and provide before-and-after imagery. For Duarte commercial clients near the foothills, we typically recommend shorter intervals than valley-standard schedules because of the elevated particulate load from Santa Ana events and canyon runoff.
Air Duct Cleaning Services in Duarte
Air Duct Cleaning Services in Duarte include full-system residential cleaning, supply and return duct cleaning, video inspection, and duct sealing for the mid-century ranch homes and newer infill that make up most of the local housing stock. A typical residential job in Duarte runs $350 – $650 for a complete system, with older homes near Royal Oaks Drive or Mount Olive Drive sometimes requiring additional attention to original galvanized trunk lines or first-replacement flex duct that has trapped decades of foothill debris. We price by the system, not by the vent, and that written price does not move once our technician is inside.
Video Inspection and Problem Identification
We run a camera through the ductwork before quoting so Duarte homeowners see exactly what we’re pricing. In foothill-adjacent neighborhoods, we regularly find compacted mineral dust and pest debris in attic flex runs that a surface cleaning would miss entirely.
Negative-Air Extraction with Agitation
Our Rotobrush rotary brushes loosen material from duct walls while Nikro negative-air machines maintain suction at 2,000 – 3,500 CFM, pulling debris into a sealed HEPA-filtered collection system. This matters in Duarte, where fine ash particles from Angeles National Forest fire events can lodge deep in supply ducts and recirculate every time the blower starts.
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 Duarte
We stock filtration and cleaning equipment from Guardsman, Rotobrush, and Honeywell, with parts available for fast turnaround on Duarte jobs. The Guardsman line handles the heavy particulate loading we see in foothill properties, while Rotobrush rotary systems agitate compacted dust in older galvanized ductwork without damaging the metal. For Duarte homeowners upgrading filtration after a cleaning, we carry Honeywell and Aprilaire media filters sized to capture the fine mineral dust and pollen that standard fiberglass panels let through. We don’t sell what we wouldn’t install in our own homes.
Common Air Duct Cleaning Problems We See in Duarte Homes
- Original galvanized trunk lines loaded with decades of foothill mineral dust. Many Duarte ranches built between the 1950s and 1970s still run first-generation or early-replacement galvanized ductwork in accessible attics. The seams and joints trap wind-blown grit from the San Gabriel canyons that recirculates every time the AC cycles.
- Compacted ash and pollen in flex duct after Santa Ana wind events. We regularly find return-air plenums and attic flex runs holding visible ash streaks and fine grit following mountain wind events. Standard suction without agitation tools leaves this material adhered to the duct walls.
- Air handler cabinets skipped during cleaning, letting fine ash re-enter the system. After a nearby Angeles National Forest fire or heavy Santa Ana period, ash settles in the blower motor compartment and cooling coils. If the technician cleans only the ducts, the remaining ash blows back into the supply side on the next startup.
- Valley-standard cleaning intervals applied to rural Duarte properties with wood heat and unpaved road dust. A home near open land with a wood stove and an unpaved driveway loads ducts faster than a filtered suburban tract in Arcadia. The interval should reflect the actual particulate rate, not a generic calendar recommendation.
Pricing for Air Duct Cleaning in Duarte, CA
| Service | Typical Range in Duarte |
|---|---|
| Residential full-system cleaning | $350 – $650 |
| Older ranch home with galvanized trunk restoration | $550 – $850 |
| Commercial light office/retail | $800 – $1,800 |
| Commercial medical/industrial | $1,200 – $2,400 |
| Video inspection only | $150 – $250 (credited toward cleaning if scheduled) |
| Duct sealing (mastic, accessible runs) | $400 – $900 |
What moves the price: system size, accessibility of attic duct runs, condition of original versus replaced ductwork, and whether we’re cleaning up after a specific Santa Ana or fire event that loaded the system heavily. We do not quote per-vent teaser prices that balloon at the door. The price is written down before work starts, and it does not move. Every Duarte estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Duarte
Our crews run regular routes to Monrovia, Baldwin Park, Arcadia, and Azusa from the Los Angeles dispatch office. Each city gets a different dust profile. Monrovia sees more urban particulate, Baldwin Park heavier freeway proximity loading, Arcadia denser tree canopy pollen, and Azusa some foothill overlap but at lower elevation than Duarte’s canyon-facing neighborhoods. We adjust our approach accordingly.
Serving Duarte, CA - Our Local Coverage Area
We’re based in the Duarte 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 Duarte
Every 2 – 3 years for most foothill-adjacent Duarte properties, versus the 3 – 5 year interval typical for lower-elevation valley homes. Rural properties with wood heat, unpaved driveways, or outbuilding systems may need annual inspection and cleaning every 18 – 24 months because of accelerated dust and ash loading from open land and Santa Ana wind events. Call (361) 326-5060 and we’ll assess your actual particulate rate.
Duarte’s position against the San Gabriel Mountains puts outdoor intakes directly in the path of canyon-runoff winds that carry mineral dust from exposed rock faces, oak and pine pollen from elevation vegetation, and wildfire ash from Angeles National Forest fire events. Lower cities like Baldwin Park or Arcadia get some of this, but Duarte’s elevation and canyon orientation concentrate the loading. Our crews see the difference in what comes out of the vacuum canister.
Yes. The mid-century ranches in this zone often have original galvanized trunk lines or early flex-duct replacements with decades of compacted foothill debris. We use camera inspection first, then rotary agitation tools that match the duct material, negative-air extraction at sufficient CFM to pull loosened material without leaving residue, and careful attention to attic runs where pest debris and dust settle in low spots. A surface register cleaning would miss most of the actual loading.
Yes. We clean ductwork in detached garages, guest houses, workshops, and barn conversions with dedicated HVAC or mini-split ducted systems. Pricing depends on system size and accessibility, with typical detached structures in Duarte running $200 – $450. We factor in longer service drives to rural properties when scheduling, and we bring sufficient hose length and power to reach structures beyond the main residence. Call (361) 326-5060 to describe your setup.
A uniformed, background-checked technician arrives inside the quoted window, inspects the system with a camera, and provides a written price before starting work. The cleaning itself takes 2 – 4 hours for a typical Duarte home, using rotary agitation and negative-air extraction with HEPA filtration. We protect floors and furnishings, clean the air handler and blower compartment, and leave before-and-after documentation. The site is left clean. Payment is due only after you verify the work. The 365-Day Done Right Promise covers everything in writing.
We were called to a mid-century ranch home near Mount Olive Drive and Royal Oaks Drive after a Santa Ana wind event left visible ash streaks on the return grille. Our tech ran a camera inspection down the original galvanized trunk, found heavy mineral dust and pest debris in the attic flex runs, then used agitation tools under negative pressure with HEPA filtration to pull the load out of the supply and return ducts and the air handler cabinet. The homeowner said the AC no longer kicked up a gritty smell on startup, and we recommended a tighter service interval because of the open land and unpaved driveway dust around the property.
Duarte’s foothill-adjacent neighborhoods, especially those just below the Angeles National Forest boundary, pull a mineral-dust and ash load from mountain canyons that lower-elevation valley cities a few miles down the slope typically do not see. That means duct cleaning here is less about lint and dander and more about fine grit, oak/pine pollen, and post-Santa Ana ash that settles deep in return plenums and attic flex runs. We’ve learned to price for the actual condition of these systems, not for a generic suburban duct profile that doesn’t match the terrain.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Duarte and the San Gabriel foothills since 2004.