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 Mountain View Homeowners Choose Lennox Air Duct Cleaning
We provide independent Mountain View Lennox service for air duct cleaning, sealing, and repair, and what sets our work apart is that we treat the cabinet, plenum, coil, and flex runs as one connected airflow system, not just a set of dirty tubes. Most duct cleaners in Mountain View will vacuum a register and call it done. A Lennox system, especially a variable-speed air handler, needs more than that: gasket integrity, plenum sealing, coil condition, and blower-wheel cleanliness all determine whether air actually reaches the rooms it’s supposed to. We’re an independent service company, not authorized or endorsed by Lennox, but we’ve spent years working on their G-series furnaces, Merit and Elite families, and Signature Collection air handlers across Santa Clara County. If you own a Lennox system in Mountain View and want the ductwork and air handler cleaned and sealed properly, call (866) 528-3938.
Why Trust Duct Cleaning Mountain View for Your Lennox Air Duct Cleaning?
We know how Lennox cabinets and plenums actually fail in the field, because we’ve pulled enough of them apart over the years to see the patterns. The factory gasketing on Lennox furnace cabinets dries out. The mastic at plenum seams cracks and opens. The ECM blower wheels on variable-speed air handlers cake with dust pulled in through those very gaps. None of that is obvious from looking at a register. It’s what makes a Lennox system’s static pressure climb while the rooms furthest from the blower stay warm in summer and cold in winter. Dave Hanson, our owner, grew up in the Shoreline West neighborhood of Mountain View and trained in the HVAC program at Foothill College in Los Altos Hills, where he built the foundation for our Lennox repair in Los Altos expertise. Since then, he’s spent more than two decades doing duct work across Santa Clara County, with a reputation built on methodical negative-pressure cleaning, the kind that pulls debris out rather than just loosening it and hoping for the best. When we work on a Lennox system, we check the cabinet seams, the return plenum transition, the cased coil, and the flex duct takeoffs. We use Abatement Technologies HEPA containment during cleaning so whatever we dislodge from your Lennox ducts goes into the filter, not back into your living room. That’s the difference between cleaning a Lennox system and simply moving dust around inside it.
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 Mountain View
- Lennox furnace cabinet air leaks at the seams. On the Elite G61 and G60 families especially, the factory gasketing between cabinet panels dries and shrinks over years of heat cycling. The result is a return-side leak that pulls attic air, garage air, or crawlspace air into the airstream. We find and seal these seams with mastic and proper gasket material, then verify the seal holds under blower pressure.
- Return-plenum sizing problems on variable-speed air handlers. Lennox Signature SL-series air handlers move a lot of air, and they’re unforgiving about return-side restriction. If the return plenum transition is undersized or kinked, the blower starves, static pressure climbs, and the ECM motor ramps up trying to compensate. In Mountain View, we regularly see this on older ranches where a high-efficiency Lennox air handler was installed on ductwork sized for a 1960s furnace. Cleaning the ducts won’t fix it. Resizing and resealing the transition will.
- Condensate and evaporator-coil fouling on Lennox cased coils. A Lennox coil that hasn’t been cleaned in years builds a mat of lint and biofilm that restricts airflow and coats the supply duct downstream. Older aluminum coils in Lennox cased-coil cabinets are particularly prone to trapping debris because of their fin density. We pull the coil panel, inspect the coil face, and clean it with proper coil cleaner and rinsing procedures that don’t drive water into the blower compartment.
- Deteriorated flex duct and poorly sealed takeoffs. Mountain View has thousands of 1950s and 60s ranch homes where Lennox systems were retrofitted onto original rigid-metal trunks with flex duct branches added later. In those homes, we routinely find short, kinked flex runs pulled tight around framing, takeoff collars sealed with tape that’s lost its adhesive twenty years ago, and inner liners that have separated and now leak conditioned air into the attic. We replace bad flex with properly sized, mastic-sealed runs and re-seal the takeoffs.
- Blower wheel dust loading on variable-speed motors. The blower wheels on Lennox variable-speed air handlers are sensitive to imbalance. Dust loading on one side of the wheel causes vibration and puts strain on the ECM motor. When we open a Lennox cabinet and see a caked blower wheel, we pull the assembly, clean the wheel, and check the motor mount before reinstallation. A clean blower wheel on a Lennox variable-speed system is quieter and lasts longer.
Lennox Parts & Our Repair-vs-Replace Approach
We’re not romantics about old equipment. For brand-critical components on Lennox systems, cabinet gaskets, coil panels, blower assemblies, we use Lennox OEM parts. There’s no good aftermarket substitute for a factory blower wheel or a coil panel that fits exactly the way the cabinet was designed. For the ductwork itself, flex duct, mastic, insulation, takeoff collars, we use quality aftermarket materials, because Lennox doesn’t make those parts, and the aftermarket options we stock are built to spec. When we find a Lennox cabinet, cased coil, or heat exchanger that’s failing, we’ll tell you straight whether cleaning and sealing will buy you years or whether replacement is the smarter money. Sometimes a 25-year-old Merit furnace with a rusted blower deck needs to go. Sometimes all it needs is a blower wheel cleaning, a new cabinet gasket, and a plenum seal, and it’ll run clean for another decade. We don’t push either direction. We show you what we found and let the condition of your system make the case. For an honest assessment of your Lennox system in Mountain View, call (866) 528-3938.
Our Lennox Service Process – Step by Step
- 1
Diagnosis and measurement. We start by listening to the system run. Then we measure static pressure across the Lennox air handler or furnace, check the return and supply plenums for leaks, open the cabinet, and inspect the blower wheel, cased coil, and filter condition. For a Lennox variable-speed system, we’ll also note whether the blower is ramping abnormally, which points to airflow restriction rather than a motor problem.
- 2
Cleaning and sealing. We deploy our Rotobrush and Nikro negative-pressure cleaning systems with Abatement Technologies HEPA containment running during the entire job. Duct cleaning happens under negative pressure so debris is pulled out and captured, not pushed into rooms. We clean supply and return ducts, the blower wheel, and the evaporator coil if required. We also re-seal cabinet seams, plenum transitions, and takeoff collars with mastic where we find leaks.
- 3
Repair or replacement. If the inspection turned up failed flex duct, a deteriorated cabinet gasket, or a coil beyond reasonable cleaning, that work is done at this stage. For Lennox-specific components, we use OEM parts. For ductwork, we use quality aftermarket flex, mastic, and insulation designed for the job. We pull and replace bad runs rather than patching over them.
- 4
Testing and verification. After the system is reassembled, we run it and re-measure static pressure and airflow at the registers. On a Lennox variable-speed air handler, the blower should settle back to normal ramp behavior once the restriction is gone. We’ll show you what we removed, what we sealed, and the before and after pressures if you want to see them.
- 5
Warranty and follow-up. We back our work in writing. The details depend on the scope of the job, but we’ll go over them with you before we leave, not bury them in fine print. If something isn’t right after we’re done, call us and we’ll come back.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in Mountain View
Our team works on the Lennox product families that Mountain View homes actually have: the Elite series G61 and G60 gas furnaces, the Merit ML and EL furnace lines, the Dave Lennox Signature Collection SL-series variable-speed air handlers, and Cupertino Lennox service covers these same Lennox heat pumps and packaged units from the Signature line. We clean evaporator coils, seal cabinets and plenums, clean blower wheels, and replace flex duct on all of these. If your Lennox system needs a specific OEM part, we’ll source it from Lennox supply channels and install it correctly. If the ductwork needs to be replaced, we’ll spec the right flex and fittings for your system’s airflow requirements, not whatever is on the truck. We also service and install Trane and Carrier systems, which means we’re multi-brand fluent and not locked into a single manufacturer’s way of doing things.
We Also Service These Brands
If your Mountain View home has a Trane or Carrier system, or you need Lennox in Palo Alto, we service those too. The same principles apply: measure static pressure, inspect the cabinet and plenum, clean under negative pressure, seal what leaks, and tell the homeowner what we found in plain language. Multi-brand experience gives us a wider reference for how your Lennox system behaves compared to the rest of the market.
FAQs – Lennox Air Duct Cleaning Service in Mountain View
No. We are an independent service company and are not authorized, sponsored, or endorsed by Lennox. We use Lennox OEM parts on brand-critical components, but that’s a supply decision, not a manufacturer relationship. What we offer is field experience: years of opening Lennox cabinets and plenums across Mountain View and knowing how they fail.
Yes, and this is exactly the kind of work we do routinely on SL-series air handlers in Mountain View. The ECM blower motor and its control module stay in place unless we’re pulling the blower wheel for cleaning, and when we do pull it, we disconnect power, tag the disconnect, and handle the wheel without touching the motor electronics. The variable-speed motor is sensitive to static pressure and dust loading, not to careful hands. Call (866) 528-3938 for an assessment.
It’s both, and it matters which side of the seam is leaking. If the gap is on the return side of the Lennox furnace, it’s pulling unfiltered air from the attic or garage into your system. If it’s on the supply side, conditioned air is being lost before it reaches the registers. Either way, the fix is mastic sealing and, if the metal has pulled apart badly, a proper transition repair. We see this regularly on G61 and G60 installations in Mountain View where the original mastic dried and cracked years ago.
In our experience, Lennox cased coils hold up as well as any brand, but their fin density means they trap debris effectively once it reaches them. In Mountain View, where systems run less often and sit idle for long stretches, dust settles in the ducts during those idle periods and gets blown onto the coil face when the system finally kicks on. Add a leaky return plenum and you get accelerated coil fouling. We recommend inspecting the coil whenever the ducts are cleaned, not every time, but at least during a full system cleaning. Call (866) 528-3938 and we’ll take a look.
It depends on what’s causing the high static pressure. If the restriction is a clogged blower wheel or a fouled coil, yes, cleaning those can bring pressures down. But if the cause is an undersized return plenum, kinked flex duct, or a collapsed duct section, cleaning won’t fix it. That’s a repair job. On Lennox variable-speed systems, high static pressure is often the canary in the coal mine, and the real issue is duct design or a failed seal. We diagnose the cause before we clean anything. Call (866) 528-3938 to schedule a static pressure test.
Lennox air duct cleaning in Mountain View generally runs $450 to $950 for a whole-home system, depending on square footage, number of registers, and whether the blower wheel and evaporator coil are included in the cleaning. Sealing work adds cost depending on how many seams and transitions need attention. If flex duct replacement is required, that’s quoted separately based on the runs involved. We quote a flat price per system before work begins, not a per-vent price, and the price we quote is the price you pay. Call (866) 528-3938 for a free estimate. We’ll come out, look at your Lennox system, and give you a number you can hold us to.
Yes. We regularly replace deteriorated flex duct on Lennox systems in Mountain View with properly sized, mastic-sealed flex runs using quality aftermarket ducting. The key is sizing the replacement runs for your system’s airflow requirements and, on variable-speed Lennox air handlers, making sure the return side isn’t being strangled by short, kinked runs. We don’t reuse old collars or tape. New flex, new sealing, proper connections.
Book Your Lennox Service in Mountain View, CA
A homeowner off Villa Street with a Lennox Signature SL-series variable-speed air handler called us because some rooms stayed warm no matter what the thermostat said. Our tech found the return plenum seam had opened where the mastic dried, the blower wheel was caked with dust pulled in around the cabinet, and the cased coil had a mat of lint starving airflow. We pulled the blower and coil for cleaning, re-sealed the cabinet and plenum with mastic, and airflow and static pressure came back into spec. Clean air isn’t a feeling – it’s what’s left after the debris is out. If your Lennox system in Mountain View needs a specialist, call (866) 528-3938 for a free estimate.
Written by Dave Hanson, Owner at Duct Cleaning Mountain View, serving Mountain View and Santa Clara County.