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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Before
AfterAir Duct Cleaning Company in Glendora, CA
Air duct cleaning in Glendora typically runs $350 – $650 for a whole-home system, with most jobs completed in a single visit. What makes Glendora different from the San Gabriel Valley floor below is the mountain: homes here pull in fine mineralized dust from the Angeles National Forest, wildfire ash, and the distinctive black residue that Santa Ana winds drive into foothill ductwork. Hollis Air Duct Cleaning dispatches crews from our Los Angeles office to serve Glendora directly, and we price every job in writing before we start. Call (361) 326-5060 for a free estimate.
Why Glendora Homes Are Different
Glendora sits where the San Gabriel Mountains meet the valley, and that geography changes what’s inside your ducts. The Santa Ana winds blow dry, hot air through canyon passes, carrying fine particulates from the Angeles National Forest straight into rooftop intakes and soffit vents. In north Glendora neighborhoods near the foothills, we regularly open return ducts to find a matte black, oily film coating the galvanized steel – residue from years of wildfire smoke infiltration that we simply don’t see five miles south in Covina or West Covina.
The housing stock reinforces the problem. Most Glendora homes were built between the 1950s and 1970s as mid-century tract housing, and many still run on original galvanized steel ductwork that was never retrofitted. That steel corrodes internally, creating rough surfaces where fine mountain dust and ash catch and build. The region’s hot-summer Mediterranean climate and chronically low humidity keep those particles light and airborne; when the HVAC kicks on, they recirculate instead of settling. We’ve cleaned systems in the Glendora hills where the dust was so fine it passed through standard fiberglass filters and coated the evaporator coil.
Our Main Glendora Services
Most Glendora homeowners call us for one of three jobs. Each has its own page with full pricing, process details, and local specifics.
Air Duct Cleaning in Glendora
We clean supply and return ductwork with a Rotobrush rotary brush system and, for heavily contaminated lines, Nikro negative-air machines that pull debris out under controlled suction. In Glendora, we pay special attention to return trunks on the north side of town, where wildfire-ash buildup often requires multiple passes. Every job gets a written price before we start and before-and-after photos of your own ducts. Air Duct Cleaning in Glendora
Dryer Vent Cleaning in Glendora
Dryer vent blockages are a leading cause of house fires, and Glendora’s dry climate means lint compacts hard and fast. We run a rotary brush and high-velocity blower through the full vent line to the exterior cap, then verify airflow with an anemometer. If your dryer takes two cycles to finish a load or the laundry room heats up, the vent is likely restricted. Dryer Vent Cleaning in Glendora
Duct Sealing in Glendora
Original Glendora ductwork from the 1960s and 1970s often leaks 20 – 30% of conditioned air into attics and crawl spaces before it reaches the rooms. We seal accessible joints with duct mastic and mechanical fasteners, then pressure-test the system to verify the seal. For older galvanized systems with widespread corrosion, we’ll tell you honestly whether sealing makes sense or if replacement is the better spend. Duct Sealing in Glendora
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.
Brands We Service in Glendora
We carry parts and filtration products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman, and we stock common sizes for Glendora’s predominant HVAC configurations. Most filter replacements and minor hardware are same-visit. For a full list of equipment we work with, see our brands.
Pricing for Air Duct Cleaning Company in Glendora, CA
| Service | Typical range in Glendora |
|---|---|
| Whole-home air duct cleaning (single system) | $350 – $650 |
| Whole-home air duct cleaning (two systems) | $550 – $950 |
| Dryer vent cleaning (ground-floor, single run) | $120 – $180 |
| Dryer vent cleaning (second story or roof cap) | $180 – $260 |
| Duct sealing (accessible ductwork, per system) | $400 – $800 |
| Return duct deep cleaning (heavy contamination) | $150 – $300 additional |
| Sanitizing treatment (per system) | $75 – $150 |
| Filter upgrade to MERV 13 (installed) | $45 – $85 |
What pushes Glendora prices toward the higher end: original galvanized ductwork with interior corrosion requiring extra brush passes, heavy wildfire-ash contamination in foothill homes, and second-story or attic systems with limited access. What keeps them lower: newer flex-duct retrofits, ground-floor equipment, and maintenance-level cleanings done on schedule. The price we write down before we start is the price you pay. No per-vent add-ons, no equipment surcharges at the door.
Neighborhoods We Serve in Glendora
We work across Glendora’s full footprint, from the south-side flatlands near the 210 to the north-side foothill streets below the wilderness boundary. Crews typically schedule within a few days and arrive inside the quoted window.
- North Glendora (foothill zone)
- Glendora Village / downtown core
- South Hills / Morgan Ranch area
- Charter Oak
- East Glendora near Lone Hill
Service Area – Cities Near Glendora
Our crews serve the full San Gabriel Valley corridor from the Los Angeles office. If you’re just outside Glendora city limits, we also work in Azusa, CA to the west, San Dimas, CA to the east, Covina, CA to the south, and La Verne, CA to the northeast. Same pricing structure, same written guarantee, same crew standards apply across the service area.
Serving Glendora, CA - Our Local Coverage Area
We’re based in the Glendora 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 Company in Glendora
No. Residential air duct cleaning does not require a city permit in Glendora. If your HOA has maintenance notification rules, we can provide a work-summary letter on request. Call (361) 326-5060 if your management company needs documentation.
We typically schedule within 2 – 4 business days, sometimes sooner for dryer vent cleaning. We do not promise same-day dispatch; duct cleaning is a scheduled job, and we book enough time to do it properly. We’ll give you a firm arrival window and call 30 minutes out.
Yes. We regularly clean ducts in north Glendora homes near Sierra Madre Avenue and above, including the steeper streets below the Angeles National Forest boundary. Those jobs often take longer due to heavy wildfire-ash residue, so we price accordingly in writing before we start.
Ready to get your Glendora ducts cleaned right? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free, written estimate. We’ll show you exactly what your system needs, price it before we touch it, and back the work with our 365-Day Done Right Promise.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Glendora Customers Say
"They checked each section with a camera and showed me the dust before and after. Thorough and honest."
- Nicole H."Duct sealing along with the cleaning cut our summer bill. Straight talk and fair price."
- Gwen O."Sealed some leaking duct joints in the crawl space with mastic. Rooms that were always cold now get air."
- Ronald W.