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.
Why Chatsworth Homeowners Choose Lennox Air Duct Cleaning
We provide independent Lennox air duct cleaning service across Chatsworth, focusing on the coil fouling, flex duct collapse at plenum connections, and return-air leaks that quietly rob these systems of airflow in valley heat. Duct Cleaning Chatsworth works on Lennox Elite Series, Merit Series, Dave Lennox Signature Collection, and XC Series equipment, and our approach differs from a general duct cleaner because we treat the whole airway: ducts, plenum, blower, and the evaporator coil. We are not affiliated with or authorized by Lennox, but the equipment brand is one we know from years of hands-on service in the San Fernando Valley. Call (888) 494-4745. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Chatsworth sits at the wind-scoured northwest edge of the San Fernando Valley, where summer afternoons push dust through the Santa Susana Pass and canyon mouths straight into return-air grilles. What that means for a Lennox system is a distinctive load of fine airborne grit, pollen, and animal dander from the horse properties and trail corridors that back onto the hillsides. It all lands on the evaporator coil and packs into the flex runs in an attic that bakes all day. If the ducts and coil are ignored long enough, that Lennox unit works harder to move less air, and the electric bill reflects it.
Why Trust Duct Cleaning Chatsworth for Your Lennox Air Duct Cleaning?
We trust our process because we’ve built it around how Lennox systems actually behave in the field, not around a brochure description. The Merit Series and Elite Series share the same vulnerability in this climate: high static pressure from old or undersized return ducts, which stresses the blower and pulls more dust than the filter can stop. Our work on Lennox equipment starts with airflow measurement before we touch a brush, because a clean duct connected to a fouled coil is half a job.
Stan Maddox, who owns Duct Cleaning Chatsworth, grew up in Shadow Hills on the northeast edge of Chatsworth and learned HVAC fundamentals at Los Angeles Pierce College in Woodland Hills before spending well over a decade cleaning and repairing duct systems in older Valley ranch homes. He has been methodical about negative-pressure containment and rotary brush work long before it was something to put on a website. “If I can’t tell you exactly what we’re doing to your ducts and why, I shouldn’t be in your house.” His youngest daughter has asthma, which is what pushed him toward indoor air quality work in the first place, and it’s the reason we care about what a Lennox system pushes into the living space after we finish.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Common Lennox Air Duct Cleaning Problems We Fix in Chatsworth
- Flex duct runs collapsing or tearing at the plenum connection. Hot attic air over years makes the inner liner of flex duct brittle, especially where it meets the metal plenum. On Lennox Merit and Elite installations we routinely find the flex has pulled away or folded inward, cutting airflow before the air even reaches the register. Cleaning the duct is pointless if the connection is torn, so we inspect and repair the transition first.
- Evaporator coils in cased coil housings loading with dust and debris. When the filter has been undersized or missed a few changeouts, the evaporator coil becomes a dust trap. A fouled coil on a Lennox system reduces heat transfer and can eventually freeze, which is why we clean the coil during a full system cleaning rather than treating it as a separate job. Coil cleaning is not optional in Chatsworth, not with the dust load these hills produce.
- Return duct undersizing or leaks causing high static pressure. Many older Chatsworth ranch homes were retrofitted for central air with returns that are too small for the blower in a modern Lennox unit. The result is high static pressure, a blower motor that works harder than it should, and more dust pulled through gaps in the return path. We measure static pressure and seal what we can, rather than blaming the equipment.
- Mastic or tape failure at metal duct joints. The dry heat of a Chatsworth attic cooks tape adhesive until it peels and crumbles, and old mastic cracks along the seams. Air that should be going to the bedrooms is instead blowing into the insulation. We find and seal these leaks with fresh mastic, which is a far more durable fix than tape.
- Dryer vent lint buildup that backs up into the laundry room. Many Lennox-serving homes in Chatsworth have laundry closets or garages attached to long dryer vent runs, and the lint from those runs eventually restricts airflow and creates a fire risk. We treat dryer vents as a separate service because they are a serious fire-safety issue, not an add-on.
Lennox Parts & Our Repair-vs-Replace Approach
We use OEM Lennox parts when they are available and cost-effective, but for common duct components like flex duct, mastic, registers, and grilles, we rely on quality aftermarket equivalents that meet or exceed OEM specifications. We are not a Lennox dealer, and we do not pretend to stock factory components for every model. What we do promise is honesty about the economics: if a duct repair on an older system keeps it running for years, we say so. If the equipment is aged and the repair is a poor investment, we say that too. Either way, pricing is set by written estimate before any work begins, and there is nothing added onto the invoice that was not on the estimate. Call (888) 494-4745 to discuss what you’re seeing.
Our Lennox Service Process – Step by Step
- 1
Diagnosis and static pressure check. We measure airflow and inspect the return, supply plenum, flex runs, and registers for leaks, damage, and contamination. On Lennox systems, this includes checking the coil for fouling and the blower wheel for dust buildup.
- 2
Containment and cleaning. We run negative-pressure containment with professional-grade Rotobrush and Nikro equipment, the same platforms used by certified remediation crews. The coil gets cleaned with a purpose-formulated cleaner, not a scrub that could bend fins.
- 3
Duct sealing and repair. We repair torn flex, seal metal duct joints with mastic, and correct obvious airflow restrictions. If a flex run has collapsed, we replace it, and we never patch a tear with tape and call it done.
- 4
System test and airflow verification. After everything is sealed and clean, we run the system and confirm airflow at the registers. If static pressure is still high or the blower is noisy, we tell you before we leave, not in a follow-up email.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in Chatsworth
We service Lennox split systems, packaged units, and the ductwork and coils connected to them, from the Elite Series and Dave Lennox Signature Collection equipment in larger hillside homes to the Merit Series and XC Series units common in mid-century ranch houses and 1980s-2000s tract subdivisions across Chatsworth. The focus stays on what we can genuinely address: full system cleaning, evaporator coil cleaning, duct sealing, and air duct repair. We do not sell or install complete Lennox HVAC systems, and we do not claim to be a factory-authorized service center. We are an independent shop that knows the ductwork side of these systems better than most.
We Also Service These Brands
While our Lennox service runs deep, we apply the same cleaning and repair standard to Trane and Carrier systems, along with most other residential brands. The ductwork and airflow principles are the same; the failure patterns differ by brand, and we know what to look for on each. If you own a Lennox system with duct issues, our process does not change.
FAQs – Lennox Air Duct Cleaning Service in Chatsworth
No. We are an independent Lennox service provider, not a factory-authorized dealer or warranty center. Our experience with Lennox equipment comes from years of hands-on service in the San Fernando Valley, not from a manufacturer’s certification program. That independence lets us recommend repair or replacement based on what is right for the homeowner, not what pushes a brand’s parts department.
In Chatsworth, most Lennox households benefit from a full system cleaning every 3 to 5 years, though homes backing onto horse properties, canyon mouths, or unpaved trail corridors may need it sooner. The dust load here is not subtle – after a Santa Ana wind event or brush-fire smoke episode from the nearby hills, supply registers show the evidence quickly. If you see dust streaks around the registers or the coil is visible and dark, it is time to call (888) 494-4745 for an estimate.
Yes, and it is usually not the ducts doing it directly. A heavily fouled evaporator coil, often caused by dust pulling through undersized filters or return leaks, reduces heat transfer until the coil temperature drops below freezing. The coil ices over, airflow drops further, and the compressor works against a solid block. Dirty ducts are the source of the coil fouling, which is why we clean the coil during full system cleaning, not as a separate upsell.
Chatsworth’s mix of mid-century ranch homes, 1980s-2000s tract subdivisions, and hillside custom homes means we see a lot of flexible duct in attics, along with hard-pipe metal duct in some of the older ranches. The flex runs are the weak point: attic heat makes the inner liner brittle, and the connections at the plenum tear or separate. Hard-pipe ducts leak at joints where old mastic has cracked. We inspect both before recommending a cleaning scope.
Yes. Cleaning ducts while leaving a dust-caked blower wheel and a fouled evaporator coil is like changing the oil and leaving the old filter in. The blower is what pushes air through the Lennox system, and a dusty wheel is out of balance and less efficient. The coil is where the actual heat exchange happens, and a dirty coil compromises everything downstream. We include blower and coil cleaning in full system cleaning, not as an add-on charge.
Chatsworth Lennox air duct cleaning typically runs between $450 and $1,200 depending on system size, number of returns, coil accessibility, and whether duct sealing or flex replacement is needed. We price per job, not per vent, and the written estimate sets the final number before any work begins. Call (888) 494-4745 for a free estimate – we will walk through what your system actually needs, not a package price pulled from a brochure.
We use OEM Lennox parts when they are available and cost-effective, but for common duct components like flex duct, mastic, registers, and grilles, we use quality aftermarket equivalents that meet or exceed OEM specifications. The parts that matter for airflow and sealing do not have a Lennox logo on them, and the aftermarket versions are often made by the same manufacturers that supply the OEM. What matters is correct sizing and proper installation, which is what we control.
No, not with our work. A manufacturer warranty exists on the equipment, not the ductwork, and cleaning or sealing ducts does not void a Lennox equipment warranty. However, if a component like a coil or blower fails under warranty, the manufacturer may require a factory-authorized contractor to handle the replacement. We can clean the system and identify the issue, and if it is a warranty component, we will tell you to contact an authorized Lennox dealer for the covered part. We do not pretend to be that dealer.
Book Your Lennox Service in Chatsworth, CA
If your Lennox system is pushing weak airflow, dusty air, or a burning smell into the living space, we can diagnose the whole airway, not just the ducts. Call (888) 494-4745 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. Duct Cleaning Chatsworth serves the entire Chatsworth area from the 1950s ranch homes near the old Santa Susana train depot to the newer subdivisions and hillside properties up toward the trailheads.
Written by Stan Maddox, Owner at Duct Cleaning Chatsworth, serving Chatsworth since 2017.