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 Los Angeles Homeowners Choose Lennox Air Duct Cleaning
Lennox air duct cleaning in Los Angeles is a specialized job because Lennox systems, particularly the high-end variable-capacity models, have tighter tolerances than most. We’re Kestrel Air Duct Los Angeles, an independent Lennox service provider, and we clean the entire air path on these systems: the return drops, the plenums, the supply runs, and the air handler itself. We’re not affiliated with or authorized by Lennox, and we’ll never imply otherwise. What we are is the crew that sees the same Lennox equipment every week across this city, from Palms to Hancock Park to the South Bay. Call (213) 733-0665 if you want someone who knows what a CBX32M air handler looks like from the inside.
Most Los Angeles homes run between $350 and $650 for a full Lennox duct cleaning, depending on the number of runs, the condition of the flex duct, and whether the blower wheel needs pulling. That’s the honest range. You’ll get the written price before any work starts. Every time.
Why Trust Kestrel Air Duct Los Angeles for Your Lennox Air Duct Cleaning?
Dale Whitmore, our owner, grew up in Palms, not far from the old Helms Bakery building. He learned HVAC fundamentals at Los Angeles Trade-Technical College before focusing entirely on duct diagnostics. Two decades in, he can tell you what a Lennox SLP98V sounds like when its blower wheel is caked with debris versus when a return flex duct has collapsed. That distinction matters. A company that only cleans grilles won’t catch the collapsed duct. We do, because we inspect the entire run with a video camera before we ever start agitation.
Every technician on our Los Angeles team is background-checked, uniformed, and trained on Lennox-specific configurations. We know where the filter cabinet sits on a SignatureSeries SLP99V, how the iComfort thermostat communicates with the variable-speed blower, and what happens when a coil starts fouling on an XC25. The Kingswell Way governs every visit: we say the price, show up in the window we gave, leave the place cleaner, and put the guarantee in writing. The 365-Day Done Right Promise means if the work falls short within the year, we return and make it right at no charge.
Styles & brands we work with
Common Lennox Air Duct Cleaning Problems We Fix in Los Angeles
After every major Santa Ana wind event, our East and South LA call volume triples, and our North Hollywood Lennox service team stays busy too. A technician can tell by the color of the dust whether it’s from the San Gabriels, the concrete canyons of downtown, or wildfire ash from the hills. Here’s what we find on Lennox systems in Los Angeles:
- Flex duct disconnects at Lennox plenums: Los Angeles attics run hot, sometimes 140°F in August. The plastic zip ties and cheap tape used on many installations degrade and fail. The flex duct slips off the takeoff collar at the plenum. Conditioned air dumps into the attic instead of the bedroom. We reattach with proper fasteners and seal the collar with mastic, which stays put for decades in LA heat.
- Evaporator coil fouling on XC25 units: The XC25 is Lennox’s variable-capacity air conditioner, and it’s a fine machine. But in Los Angeles, construction dust, wildfire ash, and pet dander infiltrate the system. The coil becomes an insulating blanket, efficiency drops, and the compressor works harder. We clean coils with professional-grade cleaners and rinse them thoroughly. On a rooftop unit in the Valley, this alone can restore a 15% efficiency loss.
- Blower wheel imbalance on ECM motors: Lennox ECM motors are efficient and quiet. They’re also sensitive to debris. When dust accumulates unevenly on the blower wheel, the motor vibrates. It may not fail immediately, but it’s working harder than it should. We remove the blower wheel, clean it in place or pull it for a deep clean, and restore balance. Ignored long enough, an ECM motor replacement runs into the thousands.
- Duct leakage at Lennox takeoff collars: The metal collars where branch ducts tap into the main trunk line often leak at the seams. You get uneven room temperatures: one bedroom freezing, another sweltering. In Los Angeles’s 1920s-1960s housing stock with original galvanized steel ducts, these collars are often original and never sealed. We find the leaks, apply mastic or aluminum tape, and balance the system. The difference is immediate.
- Collapsed return flex duct on SLP98V furnaces: This is the short-cycling culprit. When the return duct collapses, the furnace can’t pull enough air. Static pressure rises, the limit switch trips, and the system shuts down. A video inspection finds the collapsed section. We replace the duct, seal the plenum, and clean the blower wheel. One Hancock Park home had this exact failure; after our repair, the furnace ran quietly and stopped cycling on and off.
Lennox Parts & Our Repair-vs-Replace Approach
We use OEM Lennox filters, access panels, and sealants when available. They fit, they’re built for the equipment, and they don’t void any warranty considerations. For flex duct, mastic, insulation, and other consumables, quality aftermarket materials are standard and completely appropriate. There’s no reason to pay a premium for a Lennox-branded roll of silver tape.
The repair-vs-replace decision matters to us because it matters to your wallet. If a Lennox duct section has a tear but the rest of the run is sound, we patch and seal. We don’t oversell replacement. If a section has collapsed or is full of mold, replacement is the only honest option. Our video inspection gives you the evidence. You’ll see the before and after photos of your own ducts. And you’ll get the written price for repair before we start. Always.
Our Lennox Service Process – Step by Step
- 1
Diagnosis: We start by listening. What are you seeing in the house? Dust on every surface? One room always warm? Then we inspect the Lennox system with a camera. We look at the return plenum, the supply runs, the coil, and the blower wheel. We’ll show you what we find.
- 2
Repair or clean: We clean the full air path. Rotobrush rotary brush systems dislodge debris at the duct wall. Nikro negative-pressure units pull contaminants out under vacuum. Abatement Technologies HEPA filtration keeps loosened particles from entering the living space. If we find a disconnected flex duct or a leaking collar, we fix it before cleaning.
- 3
Test: We put the system back together and run it. We check static pressure on variable-capacity Lennox systems. We listen for vibration. We confirm the iComfort thermostat is reading normal.
- 4
Warranty: Every job is covered by the 365-Day Done Right Promise, in writing. If the work falls short within the guarantee period, we return and make it right at no charge. That’s not a courtesy. It’s the Kingswell Guarantee, and it’s been our standard since 2004.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in Los Angeles
We service the full Lennox line in Los Angeles homes, including Lennox repair in Los Angeles. The SLP98V variable-capacity gas furnace is one we see weekly. The XC25 variable-capacity air conditioner, the CBX32M air handler, and the SignatureSeries SLP99V are all regulars on our schedule. We stock common Lennox filter sizes, sealants, and access hardware on our trucks. If you need a specific part, we’ll source it locally and tell you the price before we order. Early G-series gas furnaces from the 1980s and 1990s are still in service in Los Angeles’s mid-century homes, and we work on those too.
If your Lennox system has a zoning setup, we pay close attention to the dampers and bypass ducts. Dirty zoning systems are often the reason one floor of a Los Angeles house feels fine while another is miserable.
We Also Service These Brands
We’re Lennox specialists, but we service all major brands. We see plenty of Trane and Carrier systems across Los Angeles, and the same principles apply: inspect the full air path, find the real problem, fix it honestly. Being multi-brand means we’re not married to one answer. We recommend what’s right for your home, not what’s convenient for our parts shelf.
FAQs – Lennox Air Duct Cleaning Service in Los Angeles
No. We are an independent Lennox service provider. We’re not authorized by, affiliated with, or sponsored by Lennox. What we offer is hands-on experience with Lennox equipment across Los Angeles, week in and week out. Our independence means we recommend what’s right for your system, not what a manufacturer program tells us to sell.
We use OEM Lennox filters, access panels, and sealants where they matter most. For flex duct, mastic, and insulation, quality aftermarket materials are the standard. They perform just as well and cost significantly less. We’ll always tell you which parts are going in and why.
Most Lennox in Van Nuys and across Los Angeles take between 3 and 5 hours for a full cleaning, including the air handler and coil if needed. Larger homes with zoning or multiple returns may run longer. We’ll give you a defined arrival window and stick to it. Call (213) 733-0665 for an exact estimate on your system.
We service the entire Lennox line: SLP98V and SLP99V variable-capacity gas furnaces, XC25 variable-capacity air conditioners, CBX32M air handlers, and early G-series furnaces still running in Los Angeles homes built in the 1950s and 1960s. If it’s a Lennox, we know it. If we don’t, we’ll say so before we touch anything.
No. Air duct cleaning and the repairs we perform do not void a Lennox manufacturer’s warranty. Cleaning the air path and sealing ducts are routine maintenance. If you have a specific warranty concern about a particular component, we’ll address it directly before any work begins. The written price you get covers everything we do; nothing changes at the door.
Most Los Angeles homes run between $350 and $650 for a full Lennox duct cleaning. The range depends on the number of duct runs, the age and condition of the flex duct, and whether the blower wheel or coil needs removal for deep cleaning. We never quote a per-vent price. You get one written price per system, agreed before work starts. Call (213) 733-0665 for a free estimate, and you’ll know the exact number before we schedule anything.
Every 3 to 5 years for most Los Angeles homes. If you live in a wildfire-adjacent area or have pets, every 2 to 3 years. The SLP98V’s variable-speed blower runs at lower speeds for longer periods, which means more air passes through the filter and ducts over time. That’s efficient for comfort, but it also means fine particulates keep moving. After a major Santa Ana wind event, your filter is doing overtime. Check it. If it’s dark after 30 days, your ducts are due sooner.
Yes. Set the iComfort thermostat to OFF before we begin. We’ll also cut power to the air handler at the disconnect. This protects the ECM blower motor and prevents the system from kicking on mid-cleaning while the return plenum is open. We’ll restore power and verify the thermostat settings when we’re done. It’s a 30-second step that prevents a very expensive mistake.
Indirectly, yes. A severely fouled evaporator coil or a collapsed return duct restricts airflow. Low airflow drops the coil temperature below freezing. The XC25 is a variable-capacity unit, so it modulates, but even it can’t overcome a plugged coil forever. If your XC25 is freezing up or short-cycling, a video inspection of the coil and return path is the first diagnostic step. Call (213) 733-0665 and we’ll schedule it.
Yes, they do. Zoning systems have dampers, bypass ducts, and multiple thermostats. If the bypass duct is clogged or the dampers are caked with dust, the system won’t balance. We inspect each zone’s duct path separately and clean the dampers and bypass. Skipping the zoning components means one floor stays uncomfortable, no matter how clean the main trunk line is.
That musty smell is almost always microbial growth on the evaporator coil or in the drain pan. In Los Angeles’s low-humidity climate, you’d think it wouldn’t happen, but the coil runs cold and produces condensation every time the AC runs. Dust and pet dander land on that wet coil, and over time, it gets biological. Cleaning the coil and treating the drain pan solves it. If the smell persists, we’ll look at the duct lining itself, but coil cleaning fixes most cases.
Book Your Lennox Service in Los Angeles, CA
We answer the phone 24/7 with a live person, not a voicemail menu. Tell me what you’re seeing in the house, and I’ll tell you honestly whether we can fix it and what it’ll cost. Call (213) 733-0665 for a free estimate on your Lennox air duct cleaning in Los Angeles. Written price before work begins. Guarantee in writing. Done right.
Written by Dale Whitmore, Owner at Kestrel Air Duct Los Angeles, serving Los Angeles since 2004.