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 Gilroy Homeowners Choose Lennox Air Duct Cleaning
Duct Cleaning Gilroy provides independent Lennox air duct cleaning, coil cleaning, and repair service throughout the Gilroy area. We’re not authorized by or affiliated with Lennox, and we don’t pretend to be. What we are is a crew that has spent 15 years working on the duct, blower, and coil side of Lennox equipment in south Santa Clara County, which means we know where these systems actually fail and what a cleaning needs to address. Call (833) 589-9833 for a free estimate.
Gilroy sits at the southern tip of Silicon Valley, where hot inland air meets agricultural dust from the garlic and produce fields that surround town. That means a Lennox system here loads up with fine particulate that coastal HVAC markets never see. Spring winds push pollen and field dust into return ducts, and homes near the garlic processing areas can end up with a sulfurous note in the ductwork that no filter alone will fix. This is the environment we work in every week.
Lennox equipment is built around all-aluminum evaporator coils, sealed blower cabinets, and tightly fitted cabinet filters. Those design choices affect how a cleaning should be done, what gets missed by a generic duct-vacuum approach, and when a cleaning stops being worth the money. This page is the resource we wish every Gilroy Lennox owner had before booking service.
Why Trust Duct Cleaning Gilroy for Your Lennox Air Duct Cleaning?
We’ve cleaned and sealed enough Lennox Merit, Elite, and Signature systems in south Santa Clara County to know exactly how their all-aluminum coils, sealed blower cabinets, and cabinet-fit filters actually fail. That matters because a Lennox furnace or air handler does not clean like a generic one. The blower wheel sits inside a sealed cabinet that traps whatever the return ducts pull in, and the evaporator coil above it catches the fine stuff the filter misses.
Our owner, Todd Schaefer, grew up near the Gilroy Gardens area and has spent most of his adult life working in and around Santa Clara County’s older housing stock, where duct systems get neglected for decades at a stretch. He picked up his HVAC fundamentals at Gavilan College in Gilroy, then spent years doing hands-on duct and ventilation work before starting Duct Cleaning Gilroy in 2011. These days he’s known for running a Rotobrush aiR+ system the right way, and for being straight with customers about what actually needs cleaning versus what can wait.
We use Rotobrush contact-cleaning equipment, which means the brush physically scrubs the duct wall rather than just blowing debris toward the next register. A Nikro HEPA-rated vacuum runs the entire time, so what we loosen doesn’t re-enter your living space. On heavier contamination jobs, Abatement Technologies filtration units let us run negative-pressure containment. If the negative pressure isn’t right before you start, you’re just moving the problem around.
We inspect before we clean and repair what needs repairing. Not every company does both. That inspection is how we catch a leaking return plenum, a loose cabinet seam, or a flex connection that’s been pulling attic air for years. On a Lennox system, those small failures compound into real airflow loss.
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 Gilroy
- Dirty blower wheels and secondary heat exchanger fins. Lennox Merit and Elite furnaces pull return-side dust straight into the blower cabinet. Over a few seasons that dust packs onto the blower wheel vanes and the fins of the secondary heat exchanger. Airflow drops, the furnace short-cycles, and the system runs hotter than it should. A cleaning that never touches the blower only solves part of the problem.
- All-aluminum evaporator coils loaded with lint and biofilm. Lennox’s aluminum coils are durable, but they still collect a film of lint, dust, and biological growth when return air is dirty. Once that film builds, the coil drips condensate into the cabinet and can soak nearby flex duct. That’s the source of a lot of musty smells in Gilroy homes. Coil cleaning needs to be part of any full Lennox system cleaning.
- Loose cabinet seams, gaskets, and foil-faced flex connections. Many Lennox air handlers in Gilroy sit in garages or attics. The cabinet is only as tight as its seams and gaskets. When a seam loosens or a flex connection sags, the return side starts drawing unconditioned garage or attic air. Dust, exhaust fumes, and insulation particles end up in the coil and blower. Sealing those connections is a service call by itself for some companies. For us it’s part of the same visit.
- Plugged cabinet-style filters and return plenums. Lennox uses cabinet-fit filters that fit tightly into a dedicated slot. When those filters plug, static pressure climbs and the blower runs hot. If the return plenum itself is dusty or partially blocked, the filter can look brand new while the system starves for air. We check plenum airflow, not just the filter face.
- Return ducts drawing dust from unconditioned spaces. Gilroy has a lot of mid-century ranch homes and 1990s-2000s tract builds with flexible ductwork in attics. When return ducts draw from an open chase, a poorly sealed garage wall, or a crawlspace, they pull agricultural dust and pollen all season. That dust forms the sticky film that drags down a Lennox coil’s performance within a couple of seasons.
Lennox Parts & Our Repair-vs-Replace Approach
We’re an independent shop, so the repair-vs-replace conversation starts from honesty, not a sales quota. On a Lennox system, we fit OEM Lennox gaskets, filters, and cabinet hardware where fit matters. When a door gasket or seal is exactly matched to the cabinet, a generic substitute doesn’t seal the same way. We use quality aftermarket mastic, foil tape, and flex when the OEM part adds cost without benefit. We’re not going to charge Lennox part prices for something that works just as well at half the cost.
What we don’t do is pretend cleaning fixes everything. When a Lennox coil is corroded through or a heat exchanger is cracked, we’ll say that plainly. Cleaning and sealing a coil that’s already failing is a bandage. If the system is at the end of its life, we’ll tell you that before we spend your money on a cleanup that won’t hold. That’s how Todd has run the business from the start, and it’s why a lot of our Gilroy work comes from referrals.
Call (833) 589-9833 if you want a straight answer about whether your Lennox system is worth cleaning or needs more. The estimate is free.
Our Lennox Service Process – Step by Step
- 1
Diagnosis. We start with a visual inspection of the return registers, filter cabinet, blower cabinet, and evaporator coil. On a Lennox air handler in a garage or attic, we also check every return-side seam, gasket, and flex connection we can reach. If we find a leak or a failing component, you’ll know before any cleaning begins.
- 2
Containment and cleaning. We establish negative pressure with our Nikro HEPA vacuum before the Rotobrush ever touches a duct wall. Then we clean the return trunks, supply runs, plenums, coil, and blower wheel. The vacuum captures what the brush dislodges so it doesn’t re-enter your living space or settle back into the attic.
- 3
Sealing and repair. If we found loose seams, sagging flex, or a leaking return plenum during diagnosis, we repair it. Mastic and foil tape on metal seams, proper reattachment on flex. Sealing a Lennox cabinet so it only pulls air from conditioned spaces is part of a proper cleaning, not an add-on.
- 4
Testing and verification. After the cleaning, we run the blower and check airflow at the registers and at the return. If static pressure was elevated before the job, we want to see it come down. On heavier contamination jobs, we document the work with before-and-after photos of the coil, blower, and ducts so you can see what changed.
- 5
Recommendations. We’ll tell you what we found and what actually matters going forward. That could be a filter-change cadence, a sealing upgrade in the return path, or a Honeywell or Aprilaire filtration add-on if your system would benefit. No pressure, no one-size-fits-all list.
See the difference
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After
Before
After
Before
AfterLennox Products We Service & Install in Gilroy
We service and install the duct, coil, and blower side of Lennox residential and light-commercial equipment. That includes Lennox Merit Series gas furnaces and air handlers, Elite Series furnaces and AC condensers, Signature Collection variable-capacity systems, and matching cased coils. We work with quality parts that fit Lennox equipment, but we don’t stock OEM line items and we’re not a Lennox dealer.
We work on what’s actually there: the return duct, the supply runs, the evaporator coil, the blower wheel, the cabinet, the filter housing. Whether it’s a newer variable-speed Signature air handler or an older Merit furnace in a Gilroy ranch home, the cleaning approach matches what the equipment needs. We service what the system is, not what a sales sheet says it should be.
We Also Service These Brands
Lennox is a big part of what we see, but it’s not the only part. We service Trane and Carrier duct and coil systems too, and the same inspection-first process applies. The point is to fix the duct system properly, not to sell a brand. If you have a mixed system or you’re not sure what’s installed, we can sort it out during the estimate.
FAQs – Lennox Air Duct Cleaning Service in Gilroy
No. We’re an independent Lennox service provider, not authorized by or affiliated with Lennox. That independence is the point: we recommend what the duct system actually needs, not what a brand program tells us to sell. We’ve built our reputation in Gilroy on straight answers and work that holds up.
Yes, it does. A garage-mounted Lennox air handler is pulling return air through the garage wall or ceiling, which means any leak in that return path pulls exhaust, dust, and whatever else the garage holds into the blower and coil. We clean the full return path and seal every seam, gasket, and flex connection between the return registers and the cabinet. If the plenum is drawing from an open chase, cleaning alone won’t solve the problem, so the sealing work is part of the same visit.
A coil cleaning will usually fix the odor itself, but only if the return side is clean enough that it won’t re-coat the coil within a season. That’s why we clean the coil and the return ducts together on a Lennox system. If the smell is coming from condensate-soaked flex right below the coil, we’ll find it during the inspection and tell you what needs attention. Call (833) 589-9833 to have it looked at. We answer 24/7.
The two most common signs are dust streaks around return registers and a furnace that runs longer than it used to while rooms feel uneven. In a Gilroy attic, a leaking return pulls hot, dusty attic air straight into the coil, so the system works harder for less result. During a cleaning we inspect the entire return path, and if we find leaks we seal them with mastic and foil tape before we finish the job.
Yes, and we do it regularly. Variable-speed blowers sit in sealed cabinets and spin at different rates depending on load, which means they can pack dust unevenly. We remove the blower, clean the wheel by hand and with our equipment, and reinstall it without compromising the motor or the cabinet seals. The key is taking the time to do it carefully, which is exactly why we don’t rush this part of the job.
We fit OEM Lennox gaskets, filters, and cabinet hardware where the fit actually matters. For mastic, foil tape, and flex, we use quality aftermarket materials that do the same job without the brand markup. If you specifically want OEM filters, we can source them, but we’ll also tell you honestly when an aftermarket equivalent does the job just as well.
Lennox air duct cleaning in Gilroy typically runs from $500 to $900 for a full system clean, depending on the size of the house, the number of returns and supplies, and how much contamination the coil and blower are carrying. A full Lennox cleaning that includes the coil, blower wheel, and return and supply ducts on a typical 1,800-square-foot Gilroy home with ranch-style ducting generally falls in the middle of that range. Homes near the garlic fields that need sulfur-odor treatment or heavy agricultural dust removal can push toward the higher end, since the job involves more time and additional filtration steps. The written estimate we give you before any work begins is the final word on price. Call (833) 589-9833 for a free estimate.
Book Your Lennox Service in Gilroy, CA
If your Lennox system is in Gilroy and the ducts haven’t been cleaned in years, don’t wait for the spring winds to make it worse. Call (833) 589-9833. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. The estimate is free, and we’ll tell you exactly what your system needs.
Written by Todd Schaefer, Owner at Duct Cleaning Gilroy, serving Gilroy since 2011.