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.
Fast, Reliable Air Duct Cleaning Across Monrovia
Air duct cleaning in Monrovia typically runs $380 – $690 for a full single-family home, depending on the number of furnaces, accessibility, and how much debris has accumulated in the system. Most Monrovia homes have older ductwork, so the job usually takes four to seven hours and includes a camera inspection before any work begins. Call (626) 469-5477 for a straight answer on whether your ducts actually need it. We’ll give you one written price before we touch anything.
Why Hollis Air Duct Pasadena Is Monrovia’s Preferred Air Duct Cleaning Company
Monrovia homeowners call us because we write the price down before work starts, and it doesn’t move. That matters in a town with as many pre-1950 homes as Monrovia has. Older ducts hide surprises: collapsed elbows, disconnected sections, return plenums pulling attic dust. A crew that quotes low and “adjusts” the bill after counting 14 registers instead of 8 is a known problem here. We don’t play that game. One flat price per system, agreed in writing, before the equipment comes off the truck.
Our technicians are background-checked and uniformed. They arrive inside the quoted window. They follow The Garrison Code on every job: price in writing, work by the book, leave the site clean. If the work fails within a year, The 365-Day Done Right Promise means we return and make it right at no charge. No renegotiation. No “that part wasn’t covered.” It’s in writing.
Roy Castellanos leads our Monrovia work. He knows the foothill neighborhoods northeast of Foothill Blvd, where ducts were retrofitted into cramped attics and access panels are anything but standard. Roy keeps the crews squared away and the promises simple.
Styles & brands we work with
HVAC Duct Cleaning in Monrovia
HVAC Duct Cleaning in Monrovia means pulling built-up dust, pet dander, and San Gabriel Mountain grit out of the supply and return lines so the air handler isn’t pushing debris through every room. On a typical Monrovia home built before 1960, the job costs $380 – $690 for the whole system, negotiated as one price before we start. This isn’t a per-vent estimate that climbs once we count registers in a retrofit. We quote it straight.
Full System Cleaning
We connect a HEPA-filtered negative pressure unit to the system and agitate the interior of the duct walls with rotary tools. This pulls contamination out rather than brushing it into the living space. The process covers both supply and return sides, and we check the plenums, the blower compartment, and the filter rack.
Video Inspection
Before and after, we run a camera scope through the lines. You see what’s actually in there. If a section is collapsed or disconnected, we show you the footage and tell you plainly whether cleaning alone will fix the problem. No scaring you into an upsell. Just the truth.
Vent Cleaning in Monrovia
Vent Cleaning in Monrovia covers the visible register boxes, grilles, and the first few feet of duct behind them where lint, hair, and dust concentrate. On older Monrovia homes, registers tend to be floor-mounted and decades old, so they collect more than new builds. The work is included in the flat system price for a full cleaning, typically $380 – $690 depending on system size and access.
Supply and Return Duct Cleaning
Supply ducts carry conditioned air out. Return ducts bring room air back to the furnace. Both need attention. In many Monrovia Craftsman homes, the return side is undersized for the volume of air the blower tries to pull, which makes it pull dirt from every air leak around it.
Registers and Grilles
We remove, clean, and reseat the register covers. We also seal any gaps between the duct boot and the flooring. That gap is where dust from the crawlspace or attic gets drawn into the airflow day after day.
Trusted Brands We Service in Monrovia
We work on systems running filtration and air-moving components from Aprilaire, Honeywell, and Abatement Technologies, and we clean using professional-grade equipment from Rotobrush and Nikro. When a Monrovia job calls for a replacement filter housing, a new access panel, or a section of flex duct, we carry the common sizes for the area’s older homes. That means we don’t drive back across the county for a part, and you don’t wait another week for a callback. We use the same equipment commercial crews use, explained in plain terms when you ask.
Common Air Duct Cleaning Problems We See in Monrovia Homes
- Original galvanized ducts with heavy interior rust. Monrovia’s pre-1950 homes often have galvanized ductwork that is 70 to 100 years old. Moisture from occasional humidity and decades of temperature cycling causes interior scaling, which holds dust that a standard vacuum won’t release. We have to agitate the duct walls to break it loose.
- Undersized returns pulling attic air. In the foothill neighborhoods north of Foothill Blvd and around Myrtle Avenue, we’ve found return ducts that are simply too small for the air handler. The negative pressure draws air through cracks in the framing, which means attic dust and insulation fibers get pulled straight into the system.
- Non-standard access panels. Older homes along streets like Canyon Blvd and Lime Avenue often have duct access points that were hand-cut during a retrofit. They’re not standard sizes, so they don’t seal properly after cleaning. If we don’t seal the panel, Santa Ana winds and attic dust re-enter within weeks.
- Construction debris, not just dust. Renovations in Monrovia’s older housing stock leave drywall dust, plaster chunks, and sawdust inside the duct runs. Builders rarely seal ducts during remodeling. Debris gets pushed toward the registers and settles there, so the first sign is reduced airflow to specific rooms.
See the difference
Before
After
Before
After
Before
AfterPricing for Air Duct Cleaning in Monrovia, CA
A full air duct cleaning in Monrovia runs $380 – $690 for a single system in a typical single-family home, which includes supply and return ducts, the blower compartment, the air handler, registers, grilles, and a camera inspection before and after. Larger homes, multiple furnaces, or systems with long runs in difficult attic spaces can push the price toward $700 – $850. We don’t quote per vent, because vent counts in older Monrovia homes are unpredictable. You get one price per system, written down, before work starts. Call (626) 469-5477 for a free estimate and an honest read on whether you even need it yet.
We Also Serve Cities Near Monrovia
Hollis Air Duct Pasadena serves Monrovia and the surrounding foothill communities. If you’re in Arcadia, Duarte, Temple City, or El Monte, our Air Duct Cleaning team can reach you the same week for a written quote. We know the housing stock in this region well enough to tell you what to expect before we arrive.
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 in Monrovia
Craftsman and Spanish Colonial homes built before 1950 often have original galvanized ducts, no insulation in the attic, and undersized returns. That combination leads to faster dust accumulation than newer construction. We typically see meaningful buildup within 3 to 5 years in these homes, compared to 5 to 7 years for a newer house. The real answer: if your filters are clogging faster than once per quarter, or you can see dust building on registers within days of wiping them, the ducts are probably overdue. Call (626) 469-5477 and we’ll help you determine whether cleaning is warranted now or can wait.
Because per-vent pricing is how Monrovia homeowners get burned. Vent counts in older homes are unpredictable. A company quoting $29 per vent may count 8 on the phone and then “find” 16 once the technician walks the house. That doubles the price on the spot. We quote one flat price per system before work starts. It covers the entire system regardless of how many registers we find. You know the number before we touch anything.
Yes. We run a camera scope through the ducts before we start and again after we finish. You get to see exactly what was in there and what it looks like when we’re done. We don’t expect you to take our word for it. The footage belongs to you. If we find a collapsed section or a disconnected joint during inspection, we show you that too, and we explain what it means for your system. You decide what to do, not us.
It does. Monrovia sits at the base of the San Gabriels. Santa Ana winds push fine mountain dust into homes through gaps in windows, doors, and framing. The diurnal temperature swing means your HVAC runs often in both heating and cooling seasons. More air passes through the ducts, more dust accumulates faster. Foothill homes above Foothill Blvd get the worst of it, especially those with attic vents facing north toward the mountains.
Yes. Many of Monrovia’s older homes have cramped attics with non-standard access. We use flexible camera scopes to inspect the runs, and our negative pressure equipment is designed to be set up in tight spaces. The cleaning happens from the register openings and the access points we can reach. We don’t skip sections we can’t see; we adapt the process to the structure of your home. That’s what working in Monrovia’s older housing stock requires.
We schedule Monrovia jobs within the week in most cases. Dispatch and scheduling are coordinated from the brand’s Los Angeles office, and crews serve Monrovia locally. You’ll get a written price before work starts and a firm arrival window. We don’t do rubber-band time windows. We tell you when to expect us and we show up inside that window.
If any part of the cleaning or the duct access work fails within a year, we return and fix it at no charge. That includes a free second visit. The promise is written into the paperwork on every job. This matters in Monrovia because older duct systems can have hidden weak points. If a seal fails, a panel pops open, or a section we worked on detached, we handle it. No argument. No invoice.
Call Us for an Honest Assessment
If you live in Monrovia and you’re wondering whether your ducts need cleaning, call (626) 469-5477. We’ll give you a straight answer and a written price. No scare tactics, no per-vent surprises, no hard sell. Just the facts about your system and what it costs to do the job right.
Written by Roy Castellanos, Owner at Hollis Air Duct Pasadena, serving Monrovia and the surrounding foothill communities.