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 Marietta Homeowners Choose Lennox Air Duct Cleaning
Kestrel Air Duct Marietta provides independent Lennox in Marietta air duct cleaning service throughout the area, with a focus on the specific ways Lennox variable-speed systems interact with duct contamination. What makes our Lennox work different comes down to this: we understand how a Lennox blower wheel collects fine dust, how that dust breaks loose during cleaning, and how to keep it from lodging in your evaporator coil fins. We’re not a manufacturer-authorized dealer, and we’re upfront about that. We’re independent technicians who see Lennox systems daily across Marietta’s older Craftsman bungalows near the Square and the sprawling 1970s-2000s subdivisions out toward East Cobb. Call (762) 533-6494 for a written estimate before any work begins.
Why Trust Kestrel Air Duct Marietta for Your Lennox Air Duct Cleaning?
Dale Whitmore, our owner, built his reputation on thorough negative-air extraction, which means a high-powered vacuum creates suction at the trunk line so loosened debris gets pulled out instead of redistributed through your home. He pairs that with rotary brush agitation: a spinning brush physically scrubs the duct walls before anything gets vacuumed away. When it comes to Lennox equipment specifically, that matters more than you’d think. Lennox variable-speed motors like the X13 and X13-V move air differently than single-speed units, and if a cleaning crew doesn’t account for that airflow pattern, they’ll knock debris loose and send it straight into the coil.
We work on Lennox Signature, Elite, and Merit series systems across Marietta. We stock OEM Lennox filters and coil-safe cleaners for the equipment side, and we keep quality aftermarket mastic and R-8 flex on the truck for duct sealing and insulation work that meets or exceeds factory specs. Every job runs under the Kingswell Guarantee: a written price before work begins, a defined arrival window, a clean job site, and a written guarantee on the work with a free return visit if the work fails within the guarantee period. Dale put it plainly once: a promise you can’t hold someone to isn’t worth much. That’s the standard our uniformed, background-checked technicians work under on every single Lennox service call in Marietta.
Styles & brands we work with
Common Lennox Air Duct Cleaning Problems We Fix in Marietta
- Blower wheel dust loading on Signature SLP98V furnaces. The variable-speed blower in the SLP98V pulls air through the return side constantly during heating season. In Marietta, where pine and oak pollen hang in the air from March through May, that blower wheel becomes a pollen trap. The fine dust cakes onto the wheel blades, throws the wheel out of balance, and reduces airflow. We pull the blower assembly, clean the wheel and housing by hand, and reinstall with new gaskets.
- Evaporator coil loading after duct cleaning on Elite XC16 systems. This is the one that catches people off guard. A duct cleaning crew agitates the ducts, debris breaks loose, and the variable-speed blower pulls it downstream into the evaporator coil fins. On an XC16 running in Marietta’s humid summers, that wet coil grabs every particle. We see this pattern weekly. Our process includes coil inspection and coil-safe cleaning after any duct agitation, so the debris doesn’t sit there and harden.
- Flex duct kinks and tears at take-off collars on Merit ML180 air handlers. The ML180 is a solid workhorse, but the flex duct connections at the air handler take-off collar are a weak point. In Marietta attics, where summer heat bakes everything above 120 degrees, the flex liner gets brittle. It kinks, it tears, and attic insulation gets pulled straight into the airstream. We repair or replace the flex run, seal the collar properly with mastic, and verify airflow before we leave.
- Pollen-packed return ducts restricting airflow to the heat exchanger. Marietta’s long spring means Lennox systems here run constantly through peak pollen season. Return ducts fill with a dense, sticky pollen mat that restricts airflow to the heat exchanger. On gas furnaces, that’s not just an efficiency problem. Restricted airflow means the heat exchanger runs hotter than it should. We remove the pollen load and recommend a filtration upgrade if the homeowner wants to slow the buildup between cleanings.
- Fiberglass duct board shedding in supply plenums. Older Lennox installations in Marietta, particularly in homes built in the 1970s through the early 1990s, often used fiberglass duct board for the supply plenum. Over decades, the interior lining breaks down and sheds fiberglass particles into the airstream. The homeowner sees dust on furniture no matter how often they change filters. We seal the duct board seams with mastic or replace the plenum section if the board has deteriorated past the point of sealing.
Lennox Parts & Our Repair-vs-Replace Approach
For Lennox equipment, we use OEM parts where it matters: filters, coil cleaners, and anything that touches the sealed system or electronic controls. For duct sealing and insulation, we prefer quality aftermarket mastic and R-8 flex that matches or exceeds factory specs. That’s not a cost-cutting measure. It’s the right material for the job, and we stand behind it under the 365-Day Done Right Promise.
Our repair-vs-replace stance is honest, and we’ll tell you the truth even when the cheaper option is what you want to hear. If a flex duct run has a single tear at the take-off collar, we repair it and seal it properly. If the duct board or flex is crumbling, saturated with mold, or has been patched repeatedly, replacement is cheaper than repeated sealing. We’ll show you what we’re seeing, explain the options, and give you a written price before any work begins. Call (762) 533-6494 to schedule an inspection.
Our Lennox Service Process – Step by Step
- 1
System diagnosis and video inspection. We start by listening to the system run and noting the airflow pattern. Then we put a camera into the supply and return plenums. On Lennox variable-speed systems, we pay special attention to blower wheel condition, coil loading, and flex duct integrity at the take-off collars. You see what we see.
- 2
Duct cleaning with negative-air extraction and rotary brush agitation. We connect the negative-air unit at the trunk line so the system is under constant suction, then run the rotary brush through each duct. The brush scrubs the walls; the vacuum pulls everything out. For Lennox variable-speed systems, we never clean against the blower’s natural airflow pattern, because that’s how debris ends up in the coil.
- 3
Blower and coil service as needed. If the blower wheel is caked or the coil is loaded, we pull the blower assembly, clean the wheel and housing, and use a coil-safe cleaner on the evaporator. We don’t skip this step just because the customer only asked for duct cleaning. If we see it, we show you and quote it before we touch it.
- 4
Duct sealing and insulation repair. We seal take-off collars, plenum seams, and any accessible duct joints with mastic. If flex runs are torn or kinked, we repair or replace them with R-8 flex that meets code for Marietta’s climate.
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Post-service verification and written guarantee. We re-check static pressure and airflow before and after. You get before-and-after photos of your ducts. And you get the 365-Day Done Right Promise in writing: if it’s not done right, we make it right at no charge within the guarantee period.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in Marietta
We service the full range of Lennox residential equipment in Marietta homes, from the Dave Lennox Signature Collection with S30 thermostat-linked systems to the builder-grade Merit Series. That includes Signature SLP98V modulating gas furnaces and XC25 variable-capacity air conditioners, Elite EL296V and XC16 systems, and Merit ML180 furnaces with 13ACX outdoor units. We clean evaporator coils, blower assemblies, and offer Air Duct Cleaning services for full duct systems on all of these. We also install and service duct sealing on Lennox systems, and we stock common OEM Lennox filters and coil-safe cleaners locally so we’re not waiting on a shipment when your system needs attention. You won’t see us advertising equipment replacement as our main service. Duct cleaning and dryer vent cleaning are what we do, and we do them thoroughly.
We Also Service These Brands
While this page covers our Lennox expertise, Kestrel Air Duct Marietta works on all major residential HVAC brands. We regularly service Trane and Carrier systems across Marietta and nearby areas like Lennox in Woodstock, and the same negative-air extraction and rotary brush agitation process applies regardless of what name is on the air handler. If your home has a mixed system or you’re not sure what you’ve got, call us and we’ll identify it.
FAQs – Lennox Air Duct Cleaning Service in Marietta
In most Marietta homes we inspect, the dust isn’t coming through the filter. It’s already in the ducts and the supply plenum. We’ve seen supply plenums lined with old fiberglass duct board shedding into the airstream, and blower wheels caked with lint that breaks loose during operation. A new filter can’t stop dust that’s already downstream of it. The fix is a thorough duct cleaning plus blower wheel cleaning and duct board sealing. Call (762) 533-6494 and we’ll put a camera in your plenum so you can see exactly where the dust is coming from.
Sometimes, yes. If the coil is accessible through a service panel and the buildup is light, we can clean it in place with a coil-safe cleaner and a soft brush. But on many Lennox installations in Marietta and surrounding areas where we provide Lennox service in Roswell, especially in tight attic and closet air handler setups, we need to remove the plenum to clean the coil properly. We’ll tell you which applies to your system before we quote the work. You’ll know the price before we start.
Duct sealing matters less in a conditioned basement than in an unconditioned attic, but it still matters if the ducts are leaking at the take-off collars or seams. Leaky ducts pull unconditioned air into the system, which means your Lennox equipment runs longer to hit the thermostat setting. In Marietta’s humid summers, that also means pulling damp air into the system. If your ducts are leaking, sealing them is worth it regardless of where they run. We’ll show you the leaks during the video inspection.
You don’t use aggressive metal brush heads on flex duct. The liner is a thin plastic film over insulation, and a metal brush will tear it. We use soft-bristle rotary brushes sized for the duct diameter, and we run the negative-air unit at the trunk line so the system stays under negative pressure the whole time. On Lennox variable-speed systems specifically, we’re careful to clean with the airflow pattern, not against it, so loosened debris flows toward the vacuum instead of into the coil. That’s the difference between a clean system and a coil full of dust two weeks later.
In Marietta’s pollen-heavy climate, we recommend pulling and cleaning the blower wheel every three to five years on variable-speed Lennox furnaces like the SLP98V and EL296V. If you have pets, run the fan continuously, or live in an area with heavy construction dust from teardown-rebuilds in East Cobb, you may need it more often. The blower wheel is upstream of the filter in many configurations, so it collects whatever the return ducts pull in. A visual inspection during a duct cleaning will tell you where your system stands.
Most homes in Marietta run between $450 and $900 for a full Lennox air duct cleaning, depending on the size of the home, the number of supply and return runs, and whether the blower wheel and evaporator coil need service as well. If duct sealing or flex replacement is needed, that’s quoted separately after the video inspection. We give you a written price before any work begins, no per-vent pricing, and the 365-Day Done Right Promise in writing. Call (762) 533-6494 for an exact quote. Estimates are free.
Book Your Lennox Service in Marietta, GA
Clean ducts, straight answers, price up front – that’s the whole deal. Call Kestrel Air Duct Marietta at (762) 533-6494 for a free estimate on Lennox air duct cleaning, evaporator coil cleaning, blower cleaning, or duct sealing. We answer with a live person, show up in the window we gave, and put every guarantee in writing.
Written by Dale Whitmore, Owner at Kestrel Air Duct Marietta, serving Marietta since 2004.