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 Houston Homeowners Choose Lennox Air Duct Cleaning
We provide independent Lennox Air Duct Cleaning services throughout Houston, and the short version is this: we diagnose and clean the duct systems behind Lennox HVAC installations all over Harris County, from decades-old G14 furnaces to current SLP99V and XC20/XC25 split systems. We are not a Lennox dealer and we have no factory affiliation, which means our recommendations are based on what your ducts actually need, not what the manufacturer wants sold. Houston’s humidity gets into every part of a Lennox system, and we built our whole process around dealing with that specific problem. Call (254) 347-2738 and we’ll give you a written price before any work starts.
What makes our Lennox work different is that we know where these systems fail in this climate. A generic duct cleaner sees flex and registers. We see the PureAir gasket that’s pulling attic air into your return trunk, the A-coil drain pan holding water after a spring storm, and the iComfort thermostat throwing a low-airflow alert because your 1990s retrofit duct runs are undersized. That’s the difference between cleaning a duct system and fixing the reason it keeps getting dirty. Dale Whitmore built our Houston team on negative-air extraction paired with rotary brush agitation, and every job runs under the written Kingswell Guarantee.
Why Trust Kestrel Air Duct Houston for Your Lennox Air Duct Cleaning?
Dale Whitmore grew up in the San Fernando Valley and picked up the fundamentals of HVAC and duct systems at Los Angeles Trade-Technical College before making Houston his working home. For years now, he and his crew have cleaned duct systems in homes from the Heights to high-rises near the Galleria, dealing firsthand with the humidity and mold pressure that Houston summers reliably dish out. When you call us about Katy Lennox service or any Lennox system, you’re talking to people who have pulled apart enough CBX25UH air handlers to know exactly where fine dust collects in the blower wheel and secondary heat exchanger.
We carry OEM and OEM-equivalent Lennox seals, gaskets, and coil doors because fitment matters on these units. A slightly-off gasket on a PureAir S housing means unfiltered attic air keeps getting pulled into your return trunk, and that defeats the entire point of cleaning. Our technicians are background-checked, uniformed, and they run Rotobrush rotary brush systems, Nikro negative-pressure units, and Abatement Technologies HEPA filtration on every job. The 365-Day Done Right Promise is in writing on every single job we do, and if the work falls short within that year, we return and make it right at no charge. That’s the Kingswell Way: say the price, show up in the window we gave, leave the place cleaner, put the guarantee in writing, come back if it fails.
Styles & brands we work with
Common Lennox Air Duct Cleaning Problems We Fix in Houston
- Variable-speed air handlers packing dust into the blower wheel. The Lennox CBX25UH and similar high-efficiency variable-speed air handlers trap fine dust in the blower wheel and secondary heat exchanger. Houston’s humidity makes that dust stick instead of passing through, which causes airflow loss and static pressure spikes. We pull the blower housing, clean the wheel with rotary brush agitation, and run negative-air extraction to pull the loosened debris out of the cabinet rather than pushing it through your supply ducts.
- PureAir S gasket leaks pulling attic air into the return. Lennox PureAir S air purification systems often develop gasket leaks around the filter housing. Once that seal fails, the system pulls unfiltered attic air into the return trunk, and your ducts end up filled with insulation fibers and whatever else lives up there. We replace the gasket with OEM-equivalent material and reseal the housing before cleaning the contaminated branch runs.
- G14 and G16 A-coil drain pans holding water and mold. Older Lennox G14 and G16 furnaces with A-coil transitions commonly hold water in the drain pan after Houston’s heavy spring rains. That standing water breeds mold, and the musty air gets pushed through supply registers into every room. We clear the drain line, treat the pan, and clean the evaporator coil so the system stops recirculating that smell.
- iComfort S30 and S40 low-airflow alerts from undersized return ducts. Lennox iComfort S30 and S40 thermostats can throw low-airflow alerts when only 30 to 40 percent of return ducts are actually open. We see this on 1990s Lennox retrofits in Houston ranch homes where the original duct sizing never accounted for the new high-efficiency system. We video-inspect the return trunk and branch runs to find the restriction, then correct it with duct sealing or replacement rather than just clearing the thermostat code.
- Mud and moisture in crawlspace duct runs after heavy rain. In older Houston neighborhoods with pier-and-beam foundations, ductwork often runs through damp crawlspaces. After a big storm, that flex absorbs moisture and collects mud, which leads to musty smells that homeowners mistake for a dirty furnace. We inspect the runs, replace or seal the damaged sections, and clean what’s salvageable instead of just masking the odor.
Lennox Parts & Our Repair-vs-Replace Approach
For Lennox-specific seals, gaskets, and coil doors, we prefer OEM or OEM-equivalent parts to keep fitment exact. That matters on a PureAir housing or a CBX blower cabinet where a slightly-off gasket means air bypassing the filter or the coil. But for duct components, we use high-grade aftermarket materials: flex duct, mastic, registers, turning vanes. The builder-grade original runs in most Houston homes are not worth matching; a quality aftermarket flex often outlasts what the tract builder installed in 1998.
We also say openly when something is past repair. A corroded Lennox plenum that’s rusted through at the seams, or collapsed flex with a tear the length of the run, is not worth re-sealing. We’ll show you the video inspection footage and explain what we’re seeing. If it can be salvaged with mastic and new gaskets, we’ll do that and save you the cost of replacement. If it can’t, we’ll tell you that too. Then we’ll give you a written price for the work before anything gets touched. Call (254) 347-2738 and we’ll help you figure out which category your system falls into.
Our Lennox Service Process – Step by Step
- 1
Video inspection of the full duct system. Before we clean anything, we run a camera through the return trunk, supply plenum, and branch runs. On Lennox systems we’re specifically checking for PureAir gasket leaks, A-coil drain pan standing water, and the static pressure issues that variable-speed systems develop in Houston’s humidity.
- 2
Seal the leaks and replace failed components. If the inspection finds a torn flex joint or a failed gasket, we fix that before cleaning. There’s no point scrubbing a duct system that’s actively pulling attic air or crawlspace moisture through a hole.
- 3
Rotary brush agitation and negative-air extraction. We run a Rotobrush spinning brush through the ducts to scrub the walls clean, while a Nikro negative-pressure unit pulls the loosened debris out of the system. An Abatement Technologies HEPA filter keeps everything contained so the dust we remove doesn’t end up in your living room.
- 4
Evaporator coil and blower housing cleaning. On Lennox variable-speed air handlers, the blower wheel and evaporator coil collect fine dust that Houston’s humidity turns into a sticky paste. We pull the housing, clean both, and reassemble with fresh OEM-equivalent gaskets where needed.
- 5
System test and static pressure check. After everything is back together, we run the system and measure static pressure. On a properly cleaned and sealed Lennox system, we expect to see a measurable drop. A customer in Meyerland with an EL296V furnace and XC20 condenser saw static pressure fall from 0.9 inches to 0.5 inches after we replaced the torn flex joint and cleaned the coil. That’s the kind of before-and-after number we verify before we leave.
- 6
Warranty documentation in writing. Every job gets the 365-Day Done Right Promise on paper. If the work falls short within that year, we return and make it right at no charge. That’s not a sales line; 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 Houston
We work on the full Lennox range: Merit Series entry-level systems like the ML14XP1 heat pump and ML180UHE furnace, Elite Series units like the EL296V two-stage furnace and EL18XCV variable-speed air conditioner, and Signature Series equipment including the SLP99V modulating furnace and XC25 variable-capacity condenser. We also service Dave Lennox Signature Collection systems paired with S40 smart thermostats, which is where the PureAir S integration and iComfort controls become part of the duct-cleaning picture. We stock common OEM-equivalent gaskets and seals locally, so most repairs don’t wait on a parts order. Trane and Carrier owners are equally served by the same crews and the same written process.
We Also Service These Brands
Most Houston homes with a Lennox system have a mix of brands across the air handler, condenser, and controls. We regularly work on Trane and Carrier installations alongside Lennox equipment, and the same written price and 365-Day Done Right Promise apply no matter what badge is on the unit. If your system is multi-brand, that’s not a problem for us.
FAQs – Lennox Air Duct Cleaning Service in Houston
No. We are an independent service provider with no factory affiliation, which means our recommendations are based on what your ducts and your system actually need. Lennox does not require authorized service for duct cleaning, and an independent provider can often be more direct about repair-versus-replace decisions because there’s no manufacturer relationship influencing the call.
For Lennox-specific seals, gaskets, and coil doors, we use OEM or OEM-equivalent parts to keep fitment exact. For duct components like flex, mastic, registers, and turning vanes, we use high-grade aftermarket materials that often outlast the builder-grade original runs in Houston homes. We’ll tell you which is which and why before any work begins.
Most Lennox in Pearland and Houston duct cleaning jobs run four to six hours for a typical single-family home. If we find a PureAir gasket leak or a torn flex joint during the video inspection, that adds time for the repair work. We’ll give you a clear arrival window and a written estimate before we start, so you know what you’re getting into and approximately how long it will take.
Actually, yes. The PureAir S is a good filtration system, but it doesn’t eliminate the need for duct cleaning. It captures fine particles at the air handler before they enter the supply side, but it does nothing for the return ducts that pull air from your living space. In Houston, return ducts still collect dust, pet hair, and the sticky grime that humidity creates. And if the PureAir gasket housing develops a leak, unfiltered attic air bypasses the filter entirely. We recommend inspecting that gasket seal annually.
It can be either, but on Lennox systems in Houston we most often trace it to undersized or partially closed return ducts. The iComfort S30 and S40 are programmed to sense airflow restrictions, and they’ll alert even when the blower itself is fine. If only a third of your return ducts are open, or the original 1990s retrofit duct runs are too small for your newer variable-speed air handler, the thermostat will flag it. We video-inspect the return trunk and branch runs to find the restriction before touching the furnace. Call (254) 347-2738 and we’ll figure out which it is.
Most Lennox duct cleaning jobs in Houston run between $450 and $950 for a full system, depending on the size of the home, the number of returns, and whether we find failed components like a PureAir gasket or a torn flex joint that need repair. If we discover something during the video inspection that changes the scope, we’ll give you a written revised price before any additional work starts. You’ll never get a door-step revision from us. Call (254) 347-2738 for an exact quote on your Houston home. Estimates are free.
Book Your Lennox Service in Houston, TX
Clean ducts, straight price, no guesswork. That’s the whole offer. If your Lennox system’s ducts are due, call (254) 347-2738 and we’ll schedule a video inspection and give you a written price before a single vent is touched.
Written by Dale Whitmore, Owner at Kestrel Air Duct Houston, serving Houston since 2004.