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 Dallas Homeowners Choose Lennox Air Duct Cleaning
We provide independent Lennox Air Duct Cleaning services throughout Dallas, and most jobs run between $450 and $900 for a full system cleaning depending on square footage and duct configuration. What sets our Lennox work apart is simple: we know these systems from the inside out, from the Signature Series variable-speed blowers to the PureAir filter cabinets that leak unfiltered air when a gasket wears. We are not authorized by Lennox, and we say that plainly, but we clean and service more Lennox-equipped Dallas homes in a month than most companies see in a year. Call (361) 314-5449 for a written price before any work begins.
Why Trust Kestrel Air Duct Dallas for Your Lennox Air Duct Cleaning?
Dale Whitmore, our owner, learned the mechanical side of HVAC systems at Los Angeles Trade-Technical College before spending two decades working his way across Texas until Dallas became home base for his crew. That background means something specific when we open up a Lennox system: we’re not guessing. We know the access panel layouts on the XC25 and SLP98V, we know where the evaporator coil sits relative to the supply plenum, and we know the exact places debris hides downstream of those high-efficiency blowers. A technician who has never worked on Lennox equipment will spend half the job figuring out where to connect. Our techs walk in already knowing.
We are an independent Lennox service provider. That’s worth saying twice because some Dallas companies imply otherwise. Lennox does not authorize or endorse any duct cleaning company, and if a contractor tells you they’re “factory authorized” for duct cleaning, ask for the paperwork. What we offer instead is real, repair-driven familiarity with Lennox products, OEM-compatible parts where it matters, and a written guarantee on every job. The 365-Day Done Right Promise says it plainly: if the work falls short within one year, we come back and make it right at no charge. That’s in writing, not a sales line.
Styles & brands we work with
Common Lennox Air Duct Cleaning Problems We Fix in Dallas
- Kinked flex ducts on zoned systems. Lennox Signature and Elite Series systems often use zoning dampers with multiple flex duct runs. If the installer kinked a run during installation, airflow drops and dust settles in the low-flow sections. We find this constantly in Dallas homes built 1990-2010, where zoning was popular and installers were rushing. The fix is replacing or re-routing the flex run, then cleaning the entire branch to remove accumulated dust.
- Biofilm on high-efficiency evaporator coils. The XC25 and other high-efficiency Lennox coils run colder and pull more moisture from the air. That moisture creates a home for biofilm, which eventually breaks loose and lines the supply ducts with sticky debris. You can’t just brush this off. It requires coil cleaning followed by full duct cleaning, or the contamination comes right back.
- PureAir and MERV-16 filter cabinet bypass leaks. Lennox PureAir cabinets are excellent filters, but the access door gasket wears out over time. When it does, unfiltered air bypasses the filter entirely and loads the ductwork with fine particulate. We check the gasket on every Lennox cleaning. If it’s worn, we replace it, then clean the ducts downstream of the bypass.
- Dust accumulation from continuous-fan operation. Variable-speed Lennox blowers running in “ON” mode pull air through the return ducts constantly. If your return ducts have even small leaks, or if the chase ways in your walls were never sealed, that continuous draw pulls dust, insulation, and attic debris into the system. This is especially common in older Dallas homes with original ductwork and unsealed chases. The fix is sealing the returns, then cleaning everything downstream.
- Separated duct joints from foundation movement. Dallas sits on expansive clay soil, and it moves. That movement cracks and separates duct joints, especially in slab-on-grade ranch homes from the 1960s and 70s. Once a joint separates, the duct pulls attic air, insulation, and dust directly into the supply stream. We find these separations with a video inspection and seal them with mastic before cleaning.
Lennox Parts & Our Repair-vs-Replace Approach
When a Lennox system needs parts, we use OEM Lennox filters, access panels, and gaskets whenever they’re available. That’s not a cost-cutting decision; it’s a fit decision. A non-OEM access panel that doesn’t seal properly creates the same bypass problem as a worn gasket. For ductwork components like flex duct, mastic, and insulation, we use high-quality aftermarket materials that meet or exceed spec. Flex duct is flex duct, and the aftermarket brands we carry are the same ones used in new Lennox installations.
Here’s our honest stance on repair versus replace. If your Lennox duct system is 18 to 20 years old, the flex runs are failing, and you’ve got major leakage, we will tell you. Cleaning a system that leaks 30% of its air is throwing money away. We’d rather recommend a duct sealing package or replacement before another cleaning. Our crew recently cleaned a 3,200 sq ft two-story Dallas home with a Lennox SLP98V furnace and XC25 air conditioner. The homeowner complained of constant dust despite a MERV-16 filter. We found a 6-inch tear in the return flex duct from a past remodel, pulling attic insulation into the system. We repaired the flex, sealed all connections with mastic, cleaned the entire system including the evaporator coil, and the homeowner’s laser particle counter readings dropped 80%. That’s the difference between cleaning and actually fixing the problem. Call (361) 314-5449 if you want a straight answer about whether your ducts need cleaning or repair.
Our Lennox Service Process – Step by Step
- 1
Diagnosis. We start with a video inspection of your Lennox duct system, including the return side, supply plenum, evaporator coil, and filter cabinet. On Lennox systems, we specifically check the PureAir gasket, zoning damper operation, and flex duct connections. You get the written price before we touch a single vent.
- 2
Repair first. If we find a torn flex run, separated joint, or failed gasket, we fix it before cleaning. There is no point cleaning a system that will re-contaminate itself. We use mastic and proper fasteners, not duct tape.
- 3
Cleaning. We run negative-air extraction from the main trunk so every register pulls clean. Our Rotobrush rotary brush system dislodges debris at the duct wall, the Nikro negative-pressure unit pulls it out, and Abatement Technologies HEPA filtration keeps loosened particles out of your living space. For Lennox systems with high-efficiency coils, we include evaporator coil cleaning as part of the job.
- 4
Testing and warranty. After cleaning, we run airflow checks and a final video inspection. You get before-and-after photos of your own ducts. Then we put the 365-Day Done Right Promise in writing: if it’s not done right, we come back and make it right within one year at no charge.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in Dallas
We work on the full range of Lennox residential equipment with Dallas Lennox service. That includes the Dave Lennox Signature Collection with the SLP98V variable-capacity furnace and XC25 variable-speed air conditioner, the Elite Series including the EL296V and XC20, and the Merit Series like the ML196 furnace and 14ACX air conditioner. We also service Lennox PureAir and MERV-16 filter cabinets, iComfort zoning systems, and the associated ductwork. We stock common Lennox-compatible filters, gaskets, flex duct, and mastic locally so most repairs happen same-visit, not a week later after parts arrive.
We Also Service These Brands
While Lennox is a big part of our Dallas work, we service Trane and Carrier systems with the same depth of knowledge. If you have a mixed system, or you’re not sure what brand you have, call us. The cleaning process is similar across brands, but the specific access points, coil locations, and filter cabinet quirks differ, and we know the differences.
FAQs – Lennox Air Duct Cleaning Service in Dallas
No. We are an independent Lennox service provider. Lennox does not authorize any duct cleaning company, so if someone claims factory authorization, that claim deserves scrutiny. What we bring instead is years of hands-on experience with Lennox equipment in Dallas homes, from compact Merit Series systems to full Signature Collection installations.
Yes, for parts where OEM matters. We use OEM Lennox filters, access panels, and gaskets. For ductwork materials like flex duct, mastic, and insulation, we use high-quality aftermarket products that meet or exceed the original specifications. The distinction is simple: use OEM where fit and sealing matter, use quality aftermarket where the material is functionally identical.
For Lennox service in Plano and Dallas, most homes take between 3 and 5 hours for a complete system cleaning, including evaporator coil cleaning and duct sealing if needed. Larger homes with zoning systems or multiple PureAir cabinets can take longer. We’ll give you a time window before the job and a written price before we start.
We service all residential Lennox series: the Dave Lennox Signature Collection (SLP98V, XC25), Elite Series (EL296V, XC20), and Merit Series (ML196, 14ACX). We also work on PureAir and MERV-16 filter cabinets, iComfort zoning, and all associated ductwork. If it says Lennox on the equipment, we’re familiar with it.
No. Duct cleaning does not void the warranty on your Lennox furnace, air conditioner, or heat pump. Those warranties cover the equipment itself, not the ductwork. However, a careless cleaning company can damage equipment, and that damage would not be covered. That’s why we use negative-air extraction rather than pushing debris downstream, and why we know where to connect without damaging Lennox coils or blowers.
Most Dallas homes needing Lennox repair in Carrollton and surrounding areas run between $450 and $900 for a complete cleaning, including the evaporator coil. Smaller single-story homes might fall under that range; larger two-story homes with zoning or significant duct repair will run higher. The written price is in your hands before we start. Call (361) 314-5449 for an exact quote. Estimates are free.
No. A PureAir filter cleans the air passing through it, but it only filters air that actually goes through the cabinet. If the gasket is worn, if return ducts leak, or if pollutants enter downstream of the filter, your ducts will still accumulate dust. We’ve cleaned many Dallas Lennox systems with PureAir filters that had significant buildup because of bypass leaks or return-side leakage.
Because dust is entering the system after the filter, or the filter is bypassing. Variable-speed Lennox blowers run more hours than single-speed units, especially in “ON” mode. That continuous operation pulls air through any leak in the return ducts, wall chases, or filter cabinet. The fix is sealing the leaks, not changing the filter more often. Call (361) 314-5449 and we’ll find the entry point.
Yes, and this is not optional on high-efficiency Lennox systems. The XC25 runs a colder coil that pulls more moisture, and that moisture accelerates biofilm growth. If you clean the ducts but leave the coil, the contamination spreads back into the supply ducts within months. We include coil cleaning as a standard part of Lennox system cleaning, not an upsell.
Indirectly, yes. The iComfort thermostat reads what the sensors tell it, but a restricted system with dirty ducts, a loaded coil, or a clogged filter will cause uneven temperatures and humidity swings. The thermostat is reporting accurately. The system is underperforming. Cleaning the ducts and coil often resolves the comfort complaints that owners mistake for a thermostat problem. Call (361) 314-5449 if your Dallas home has uneven temperatures despite a functioning iComfort system.
Combined agitation and negative-air extraction. The metal trunks can handle aggressive brush agitation to dislodge caked-on debris. The flex branches need gentler treatment to avoid tearing the inner liner. We adjust the Rotobrush speed and pressure section by section. This is exactly the kind of mixed-material duct system common in Dallas homes from the 1980s and 90s, and it’s why one-size-fits-all cleaning doesn’t work. Call (361) 314-5449 for a system-specific assessment.
Book Your Lennox Service in Dallas, TX
Clean ducts, clear price, nothing hidden in either one. That’s the way we’ve worked since 2004 under the Kingswell Guarantee, and it applies to every Lennox system we service in Dallas. Call (361) 314-5449 for a free estimate and a written price before any work begins. A live person answers, any time of day.
Written by Dale Whitmore, Owner at Kestrel Air Duct Dallas, serving Dallas since 2004.