Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Air Duct Cleaning Company in Monrovia, CA
Hollis Air Duct Cleaning provides whole-home air duct cleaning in Monrovia, CA, with pricing written down before any work starts and every job covered by our 365-Day Done Right Promise. Monrovia’s older housing stock, foothill location, and Santa Ana wind patterns mean ducts here collect dust and debris differently than in newer LA suburbs, and the work calls for equipment and methods that match the house. Call us at (626) 469-5477 for an honest quote, or read on for what makes Monrovia jobs unique.
Why Monrovia Homes Are Different
Monrovia’s housing stock runs heavily toward single-family detached homes from the early 20th century: Craftsman bungalows, Spanish Colonial Revivals, and a fair number of 1920s and 1930s builds that still run on their original galvanized ductwork. That old metal ducting is rarely insulated, and many of these homes have duct runs through unventilated attics where summer heat bakes the metal and forces loose fibers, plaster dust, and fine debris into the airflow stream. Add in the Santa Ana winds that sweep down from the San Gabriel Mountains, and we consistently find dust loading in Monrovia ducts that newer neighborhoods just don’t see.
Homes in the older foothill neighborhoods northeast of Foothill Blvd add another layer: many were retrofitted with HVAC systems decades after construction, which means duct runs were squeezed into cramped attic spaces with non-standard access panels. We use flexible camera scopes on those jobs, because you can’t visually inspect a duct from a single access point when the run makes two tight turns before it reaches the registers. That’s not a universal practice in this trade, but it’s the only honest way to clean what you can’t directly see.
Styles & brands we work with
Our Main Monrovia Services
Most Monrovia homeowners call us for air duct cleaning and dryer vent cleaning, and a growing number add duct sealing once they learn what leaking ducts cost them in the foothill heat. Each service gets its own Monrovia page with local pricing and detail; here’s the short version.
Air Duct Cleaning in Monrovia
Whole-home air duct cleaning in Monrovia is a scheduled job, not an emergency call. We run a negative-air machine to keep loose dust from blowing into your living space, then work a rotary brush system through each supply and return run to break debris off the duct walls. On older Craftsman homes with original galvanized runs, we inspect for rust scale and deteriorated joints before cleaning begins. Full details and current pricing are on the Air Duct Cleaning in Monrovia page.
Dryer Vent Cleaning in Monrovia
Dryer vent cleaning in Monrovia matters more than most owners realize, because lint builds up faster when a vent run is long, has multiple bends, or terminates on a roof instead of an exterior wall. Many older Monrovia homes have vent runs that were added as an afterthought, routed through crawlspaces or attics with materials that never should have been used. We clean the full run from dryer to termination and show you what came out. Details are on the Dryer Vent Cleaning in Monrovia page.
Duct Sealing in Monrovia
Duct sealing addresses the leaks most homeowners never see: joints that separated when the house settled, boots that lost their seal around the register, runs that were never properly connected at install. In Monrovia, where HVAC systems cycle hard through hot summers and cool mountain nights, leaking ducts pull attic air into the system and push conditioned air out of it. We seal with mastic, which is the durable, code-accepted method, not foil tape. Read more on the Duct Sealing in Monrovia page.
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 Monrovia
Our equipment is professional-grade and chosen for the work it does, not the name on the box. We run Rotobrush rotary brush systems and Nikro negative-air machines, and we stock replacement filters and components from Honeywell, Aprilaire, Abatement Technologies, and Guardsman. When a filter housing or an access door needs replacement, we bring the part in the van. Our full our brands list includes everything we service and install.
See the difference
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After
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AfterPricing for Air Duct Cleaning Company in Monrovia, CA
| Service | Typical range in Monrovia |
|---|---|
| Whole-home air duct cleaning (up to 10 vents) | $395 – $595 |
| Each additional vent beyond 10 | $25 – $35 |
| Dryer vent cleaning | $85 – $165 |
| Duct sealing, per access point | $95 – $175 |
| Furnace or air handler cleaning | $150 – $350 |
| AC evaporator coil cleaning | $175 – $375 |
| Blower motor and housing cleaning | $125 – $300 |
| Return air duct cleaning (individual run) | $85 – $200 |
| Duct sanitization treatment | $195 – $395 |
What pushes a Monrovia job toward the upper end is access: older foothill homes with non-standard attic panels, tight crawlspaces, or duct runs that require additional time to reach will cost more than a straightforward single-story with a walkable attic. The price is written down before we start, and it doesn’t move at the door.
Neighborhoods We Serve in Monrovia
We cover all of Monrovia, from the foothill streets northeast of Foothill Blvd down to the neighborhoods south of Huntington Drive. Scheduling is coordinated from the brand’s Los Angeles office, and our crews work Monrovia daily.
- North Monrovia (foothills)
- Old Town Monrovia
- Monrovia Heights
- South Monrovia
- Mayflower Village area
Service Area – Cities Near Monrovia
In addition to Monrovia, we serve the surrounding San Gabriel Valley communities. Homeowners in Arcadia, CA, Duarte, CA, Temple City, CA, and El Monte, CA can book the same written pricing and 365-Day Done Right Promise. If you’re in a neighboring community and unsure whether we cover your street, call and ask.
Serving Monrovia, CA - Our Local Coverage Area
We’re based in the Monrovia 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 Monrovia
Most Monrovia jobs are scheduled within 3 to 7 business days, depending on the season. Early summer fills faster because homeowners want the work done before the heat really sets in. Call us at (626) 469-5477 and we’ll give you the next available window in plain terms.
Air duct cleaning and dryer vent cleaning do not require a permit in the City of Monrovia. Duct sealing is also permit-free standard HVAC maintenance work. If you’re replacing duct runs or making structural changes to attic access, that’s a different conversation, and we’ll tell you before any work begins.
Interior duct cleaning and sealing rarely needs HOA sign-off in Monrovia’s older neighborhoods, but some of the newer planned communities have stricter rules. If you have a question, check your CC&Rs first. We’re happy to provide a written description of the work for any HOA that asks for one.
Ready to talk? Call us at (626) 469-5477 for a free estimate, or to get the written price locked in before we arrive. No per-vent pricing, no bait-and-switch, no moving numbers. Just a clean job at a figure you approve in advance.
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 Monrovia Customers Say
"Good job on the ducts. Ran about an hour over the estimate, though they told me early. Air smells cleaner."
- Mike E."Careful with the carpet and furniture. Even wiped down the vent covers before putting them back."
- Leo B."Sealed some leaking duct joints in the crawl space with mastic. Rooms that were always cold now get air."
- Ronald W.