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.
Lennox Air Duct Cleaning in San Mateo, CA
We clean and repair ductwork connected to Lennox furnaces, air handlers, and heat pumps throughout San Mateo. The work here is different because so many homes in the Highlands and Baywood neighborhoods still run original 1950s and 60s sheet-metal ductwork, and that aging steel doesn’t behave the same way as newer flex duct. We’re an independent shop, so we’ll tell you what your Lennox system actually needs, not what a manufacturer program wants us to sell. Call (855) 356-5880 for a free estimate.
Why San Mateo Residents Choose Us for Lennox Service
Most duct cleaners show up with a shop vac and a flashlight. We don’t. We run Rotobrush rotary brush systems and Nikro HEPA-vacuum rigs, the same gear you’d see on a commercial job. That matters in San Mateo because the housing stock here throws problems at you that a consumer-grade setup can’t touch: corroded galvanized runs, crawlspace moisture, decades of pet hair packed into sheet-metal returns.
Sal Underwood runs the company, and he grew up in the East Bay and learned HVAC through the Chabot College program before spending well over a decade in the trade. He started this company in 2018. The way we see it, if you own a Lennox system in San Mateo, you need someone who can clean the ducts and fix what’s wrong with them in the same visit. That’s the whole point. One visit. Clean ducts, sealed repairs, safer dryer vent.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Common Lennox Air Duct Cleaning Problems We Solve in San Mateo
We’ve spent enough time inside San Mateo crawlspaces and attics to know what fails on Lennox-fed ductwork here. These are the patterns we see repeatedly:
- Cabinet-seam and return-plenum leaks on older Lennox Merit furnaces. The mastic dries out over decades, and in San Mateo’s damp Bay air those hairline gaps start pulling crawlspace moisture and musty odors straight into the return. You smell it at the registers but can’t find the source. We find it with pressure testing and seal it with fresh mastic.
- Evaporator coil fouling on Lennox cased coils. A clogged filter or a crushed flex return starves the coil of airflow, and once that coil loads up with dust and biological growth, your cooling output drops and the system works harder. We clean cased coils with professional methods, not a brush from the hardware store.
- Heat exchanger stress on older G61MPV furnaces. Restricted return ducting and floor-register runs choke airflow, which stresses the heat exchanger. Before we condemn anything, we verify with a combustion analyzer. Sometimes the exchanger is fine and the duct restriction is the real problem.
- Blower wheel imbalance from years of dog hair and dust. Homes with original sheet-metal returns and no media filter load blower wheels unevenly. That causes vibration, bearing wear, and a hum you hear through the whole house. We pull the blower, clean it, and check balance.
- Rusted-through seams and rodent entry in crawlspace duct runs. This one is very San Mateo. In the flats east of El Camino near downtown, many 1950s homes have floor registers fed by ducts passing through damp crawlspaces. We routinely find rusted seams and openings where rodents got in.
Lennox Service in San Mateo: What Local Conditions Mean for Your Equipment
San Mateo’s Highlands and Baywood neighborhoods are full of Eichler-influenced ranches built with original rigid sheet-metal ductwork and almost no filtration. That’s the key fact for Lennox owners here. The galvanized runs were installed when the homes were built, and in the mild marine climate they’ve spent seventy years collecting dust, pet hair, and corrosion from attic condensation that never fully dries. A duct run that looked fine ten years ago is now thin at the seams, rusted through in spots, and pulling damp crawlspace air into the house every time the blower runs. Inland cities don’t deal with this. It’s a San Mateo problem, and it changes what duct cleaning means: here it’s less about post-construction debris and more about rescuing a system that’s quietly failing from the inside. If you can’t remember the last time your ducts were cleaned, that’s usually answer enough.
Lennox Models & Products We Service in San Mateo
We work on the full practical range of Lennox equipment found in San Mateo homes: Merit series gas furnaces, Elite series furnaces and air handlers, Dave Lennox Signature Collection variable-capacity systems, and XC/XC21/XC25 air conditioners paired with matching indoor coils. We’re an independent shop, not a Lennox dealer, so we’re describing the equipment we service, not a product line we’re pushing. For repairs, we use OEM coils, ignitors, and flame sensors where the part is still in production, and quality aftermarket parts for commodity items like filters, mastic, and flex duct. If a 25-year-old Merit furnace has a cracked heat exchanger and a rusted cabinet, we’ll tell you straight that sealing a system that far gone isn’t the right spend. Repairing Lennox equipment means knowing when to fix and when to recommend replacement.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in San Mateo
Duct cleaning isn’t priced like a menu. The size of your home, the condition of the ductwork, how many returns and registers you have, whether there’s a crawlspace or attic access, and whether we’re also repairing seams or cleaning a fouled coil all affect the estimate. The estimate is free, and the written estimate sets the final price before we start. We don’t quote a low teaser number and then inflate it once the van shows up. That bait-and-switch reputation is a real problem in this industry, and it’s exactly what we don’t do. We quote one flat price per system. Call (855) 356-5880 for an exact quote on your Lennox system.
Key takeaways for San Mateo Lennox owners:
- Original sheet-metal ducts in older ranches need inspection, not just cleaning.
- Marine-air corrosion and crawlspace moisture are local failure drivers.
- We clean it and fix it in one visit.
- Free written estimates. Commercial-grade equipment, residential pricing.
Serving San Mateo, CA – Our Local Coverage Area
We serve San Mateo and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs – Lennox Air Duct Cleaning in San Mateo
Yes, and that’s most of what we do in this city. Crawlspace duct runs in 1940s through 1960s-era homes around the Highlands and Baywood are our everyday work. We run a camera through the runs, find the rust and rodent entry points, and seal or patch as needed. The cleaning and the repair happen on the same visit.
Very likely, especially if you live in the flats east of El Camino near downtown. The first fall rains raise crawlspace humidity, and if your Lennox-fed supply runs have rusted-through seams, the blower pulls that damp air straight into the house. We trace it with video inspection. Call (855) 356-5880 and we’ll walk you through what we’d check.
San Mateo’s HVAC systems run less than inland systems, so dust accumulates slowly. But the marine air and crawlspace moisture mean corrosion and biological growth build up in ways that pure dust doesn’t. We generally tell people to inspect every few years and clean when there’s visible buildup, a musty smell, or airflow that’s dropped. If you have pets, original sheet-metal ducts, or a crawlspace, you’ll likely need it sooner.
Sometimes. If the flex duct is crushed in a tight attic space, we can often re-route it or replace just the damaged section rather than the whole run. If the inner liner is torn, replacement of that section is the honest fix. We’ll show you the camera footage so you can see what we’re seeing.
No. Duct sealing is separate from the equipment warranty. We’re an independent service provider, not a Lennox authorized dealer, but sealing ducts with mastic or replacing damaged flex sections doesn’t touch the furnace or air handler warranty. The ductwork was never covered by the equipment warranty in the first place.
Service Areas Near San Mateo
Beyond San Mateo itself, we regularly run jobs in San Leandro, Oakland, Hayward, Alameda, and Berkeley. If you’re up in San Mateo and need a Lennox duct specialist, we’re a phone call away. We also serve San Leandro and Alameda for the same kind of work.
Book Your Lennox Service in San Mateo Today
We show up with Rotobrush and Nikro rigs, not a shop vac and a flashlight. If your Lennox system needs duct cleaning, coil cleaning, duct sealing, or a full video inspection, call (855) 356-5880 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by Sal Underwood, Owner at Duct Cleaning San Leandro, serving San Mateo since 2018.