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 Brentwood Homeowners Choose Lennox Air Duct Cleaning
We provide independent Lennox service in Brentwood, from the two-story tract homes in Shadow Lakes to the newer infill along the Highway 4 corridor. What makes our Lennox work different is simple: we clean and seal the ductwork that feeds your Lennox equipment, not just the inside of the vents. Most Brentwood Lennox systems are 15 to 30 years old, running original flex duct through hot attics, and the problems we find are almost always airflow problems: collapsed supplies, leaking plenums, filthy cased coils. That’s the work we do every week, and it’s why a cleaning call on a Lennox home often becomes a repair-and-reseal job. We are not an authorized Lennox dealer and never claim to be. We’re an independent Brentwood duct specialist that knows Lennox equipment from the duct side out. Call (833) 631-4988 to talk to someone who has actually opened up Lennox systems in your neighborhood.
Why Trust Duct Cleaning Brentwood for Your Lennox Air Duct Cleaning?
Rick Sommer grew up in Brentwood and still lives a few minutes from Marsh Creek, where he rode his bike as a kid through the same open country that’s now filled with master-planned neighborhoods. He learned HVAC fundamentals at Los Medanos College in Pittsburg, then spent years in the field before focusing exclusively on air duct work here. What that means for your Lennox system: we’ve pulled thousands of flex runs out of Brentwood attics and we know what Lennox equipment does to ductwork, and what ductwork does to Lennox equipment.
We work on Merit Series air handlers, Elite Series condensers, and Signature Collection variable-speed systems every month. We know what a Lennox cased coil looks like when it’s been running dirty for six Brentwood summers. We know how a sagging return plenum starves a variable-speed blower. The duct doesn’t lie, open it up and you’ll know exactly what you’ve been breathing. Our team brings Rotobrush and Nikro cleaning systems to every job, contractor-grade equipment that most Brentwood homeowners have never seen, plus Abatement Technologies tools for contaminant control when the job calls for it. We clean, we find problems, and we fix them. That’s the whole job description.
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 Brentwood
- Collapsed or torn flex supply runs behind Lennox air handlers. Brentwood attics hit 130°F in summer and that heat bakes the outer jacket off flexible duct. The inner liner sags, kinks, or tears at the takeoff collar. We see this constantly on Merit Series air handler installations in homes built between 1995 and 2010. Bedrooms at the end of long runs go warm and stay warm. Cleaning won’t fix a collapsed run, so we identify it with a video inspection and replace the damaged section.
- Fouled Lennox cased coils and overflowing drain pans. The cased coil sits above the furnace or air handler and catches everything the filter misses. Over years, dust and biofilm pack the coil fins and the condensate pan below it. The pan fills, overflows, and you get water in the cabinet and into the ductwork. We clean the coil, flush the pan, and clear the condensate line as part of a full system cleaning on Elite and Merit systems.
- Undersized or unsealed return ducts starving variable-speed blowers. Lennox Signature Collection systems with variable-speed ECM blowers need proper return airflow. When the return is too small or pulling attic air through failed tape at the cabinet, static pressure climbs and the blower ramps up, wearing out faster and making noise. We seal the return plenum, enlarge the return if needed, and get static pressure back to spec. This is a cleaning-and-sealing job, not a new furnace job.
- Loose mastic and tape at Lennox plenum transitions. The connection between your Lennox indoor unit and the main supply or return trunk is called a plenum transition. In Brentwood’s dry heat, tape hardens and fails, mastic cracks, and conditioned air pours into the attic. A duct cleaning call on a Lennox system frequently turns into a re-seal job at these transitions. We use fresh mastic and UL-listed tape to close the gaps, then verify with a smoke test.
- Dirty return ducts loading up filters and Healthy Climate media cabinets. Lennox Healthy Climate media cabinets hold a thick, high-efficiency filter, but if the return ducts feeding that cabinet are packed with construction dust or wildfire particulate, the filter loads up in weeks instead of months. We clean the entire return side, from the grille to the cabinet, so your Lennox filtration actually has a chance to do its job. After the Camp Fire smoke event in 2018, Brentwood returns were black with particulate in homes that had never been cleaned.
Lennox Parts & Our Repair-vs-Replace Approach
We’re realistic about parts. Where the OEM part matters, like a Lennox filter cabinet, drain pan, or blower component, we use genuine Lennox. Fit is exact, warranty continuity holds, and there’s no mystery when the next technician opens the panel. Where the OEM part adds no value, like flexible duct, mastic, insulation, and takeoff collars, we use quality aftermarket materials. A flex run is a flex run, but a cheap one fails in three Brentwood summers. We buy the good stuff because we’re the ones replacing it if it fails.
On the repair-versus-replace question, we give you an honest read. A badly fouled Lennox coil can sometimes be cleaned and returned to service. A heat exchanger showing signs of failure is a different conversation. We don’t default to replacement and we don’t upsell you into equipment you don’t need. We show you the video, explain what we found, and let you decide. Call (833) 631-4988 if you want a straight answer on your Lennox repair in Bel Air or Brentwood system.
Our Lennox Service Process – Step by Step
- 1
Diagnosis and video inspection. We start with a conversation about what you’re noticing, then run a camera through the supply and return ductwork. On a Brentwood Lennox job, we’re looking specifically for collapsed flex, plenum leaks, and coil fouling. We show you the footage. You should see what we see.
- 2
Repair, seal, and prepare. Before cleaning, we fix what’s broken: collapsed runs, failed tape, cracked mastic, sagging hangers. We seal the plenum transitions on your Lennox cabinet so the cleaning airflow actually works and the system holds air when we’re done. Cleaning a leaky system sends half the agitation pressure into the attic instead of through the ducts.
- 3
Full system cleaning. We run our Rotobrush or Nikro system through every supply and return run, the trunk lines, the plenums, and the air handler cabinet. For a Lennox system that includes the cased coil and drain pan when we find fouling. This is negative-air, HEPA-filtered cleaning, not a shop vac on a stick.
- 4
Post-cleaning verification and test. We run the Lennox blower, check static pressure across the system, verify return and supply airflow at the registers, and re-inspect with the camera where needed. You get before-and-after footage and a clear picture of what changed. The goal isn’t cleaner-looking registers. It’s a Lennox system moving the right amount of air through sealed, clean ductwork.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in Brentwood
Our Wilshire Center Lennox service team also handles Brentwood – we install ductwork, filtration, and airflow components across the entire Lennox residential lineup: Merit Series gas furnaces and air handlers, Elite Series EL and XC air conditioners and heat pumps, and Signature Collection variable-capacity systems. That includes working around, cleaning, and maintaining Lennox Healthy Climate filtration cabinets and duct-mounted media units. We stock common Lennox filter cabinet sizes, drain pans, and blower motor components locally in Brentwood, along with the flex duct, mastic, and insulation needed for repair work. If your Lennox system was installed in the 1990s or 2000s and the ducts have never been touched, we can clean it all back to functional, sealed condition.
We Also Service These Brands
Our Brentwood duct cleaning and repair crew works on Trane and Carrier systems as often as we work on Lennox. The ductwork problems are usually the same: hot attics, failing tape, collapsed flex, dirty returns. The equipment quirks differ, and we know those too. If you have a mixed system or a second home with different equipment, one call covers it.
FAQs – Lennox Air Duct Cleaning Service in Brentwood
Yes. A dirty return duct restricts airflow, and a Lennox variable-speed ECM blower responds by ramping up to hit its target CFM. That means higher static pressure, more motor heat, more energy use, and a louder system. In Brentwood tract homes with undersized returns, a dirty return compounds the problem and shortens blower life. Cleaning and sealing the return side is the single highest-impact thing we do for variable-speed Lennox systems. If your blower has been running loud or ramping erratically, call (833) 631-4988 and we’ll put a camera in the return to see what’s going on.
Most of the time, yes. The cased coil sits in the airstream above the furnace or air handler, and when the coil fins are packed with dust and the drain pan is full of biofilm sludge, condensate overflows into the cabinet and down into the ductwork. It’s a cleaning problem first: the coil and pan are fouled. We clean the coil, flush the drain pan and condensate line, and in most cases that stops the overflow. If the pan is rusted or cracked, we replace it with an OEM Lennox pan. Call (833) 631-4988 and we’ll diagnose it before you buy anything.
Yes, and we do it regularly. The Healthy Climate media cabinet holds a thick filter that’s a big part of your system’s filtration. We clean the return ducts feeding that cabinet and inspect the cabinet itself for bypass leaks around the filter frame. A bypass leak lets unfiltered air skirt the filter and head straight into the coil. We seal the cabinet, replace the media filter if needed, and verify airflow through the system. The ductwork and the cabinet work as one unit, so we treat them that way.
No. Duct sealing with mastic and UL-listed tape is a standard, code-compliant repair that doesn’t touch your Lennox equipment warranty. We’re an independent service provider, not a Lennox authorized dealer, so we don’t represent ourselves as doing warranty work. What we do is seal the leaky plenum transitions, return ducts, and supply connections on and around the Lennox cabinet. That improves airflow and system performance. It doesn’t void anything. If you have a specific warranty concern, ask us before we start and we’ll walk you through what we’re doing and why.
The symptom is uneven room temperatures: some rooms get plenty of air, others stay warm or cold no matter what the thermostat says. In Brentwood two-story homes, the rooms at the end of long flex runs are the first to suffer. The other tell is a sudden drop in airflow in one vent, often accompanied by a soft whistling at the register. The only way to know for sure is to inspect the duct with a camera, which is exactly what we do. Collapsed flex doesn’t fix itself and no amount of filter changes or thermostat adjustments will help. Call (833) 631-4988 and we’ll put eyes on it.
For a typical Brentwood two-story Lennox home with 15 to 30 year old flex duct, a full cleaning and inspection runs from $500 to $1,000, depending on the number of supply and return runs and the condition of the system. If we find collapsed flex, leaking plenums, or a fouled coil, repair work is quoted separately before we do it. No per-vent pricing, no surprises after we start. You get one flat price per system, agreed to before work begins. Call (833) 631-4988 for an exact quote on your Lennox system. Estimates are free.
Book Your Lennox Service in Brentwood, CA
If your Brentwood Lennox in Sawtelle or Brentwood system is running with dirty ducts, uneven airflow, or a coil that won’t stop overflowing, we can fix it. We clean, seal, and repair the ductwork that feeds your Lennox equipment, using professional-grade tools and honest pricing. Call (833) 631-4988 for a free estimate and real answers.
Written by Rick Sommer, Owner at Duct Cleaning Brentwood, serving Brentwood and the far-east Contra Costa valley.