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 Sylmar, CA | Hollis Air Duct Santa Clarita
Air Duct Cleaning in Sylmar for Lennox systems typically runs between $350 and $650 for a full single-system home, depending on ductwork condition and whether we’re also sealing leaks or cleaning the blower and coil. We’re an independent Lennox service provider, not a manufacturer dealer, and the one thing that sets our Sylmar work apart is this: we schedule video inspections after Santa Ana wind events because we know exactly what those downslope gusts deposit inside your return plenums. Roy Castellanos and our crew serve Sylmar from our Santa Clarita base. Call (661) 523-0295 for a free estimate.
Why Sylmar Residents Choose Us for Lennox Service
Most duct cleaning companies treat a Lennox system the same as any other. We don’t, because a variable-speed ECM blower doesn’t respond to debris the way a builder-grade single-speed motor does. Our techs work on Lennox Signature, Elite, and Merit systems across Sylmar’s mix of 1950s flatland homes and newer hillside builds, and we understand how each handles the dust load this part of the San Fernando Valley throws at it. Roy Castellanos grew up in East Los Angeles and trained in HVAC at Los Angeles Trade-Technical College before moving into duct cleaning full time. He’s spent years working Santa Clarita and Sylmar systems, and he’ll tell you the same thing on every job: clean ducts move clean air. Everything else is just sales talk.
We’re also a Sylmar service area provider with a real local footprint. We answer the phone with a live person, write your price down before work starts, and stand behind every job with our 365-Day Done Right Promise. If the work fails within a year, we come back and make it right at no charge. That’s not a slogan; it’s in writing on every invoice.
Styles & brands we work with
Common Lennox Air Duct Cleaning Problems We Solve in Sylmar
- Variable-speed blower wheels caked with Santa Ana dust. The fine mountain dust and wildfire ash that Sylmar winds push through return ducts settles directly on Lennox variable-speed blower wheels. The imbalance causes a low humming noise and eventually stresses the ECM motor bearings. We clean the wheel and housing to factory airflow specs, not just “good enough.”
- Pleated media filters clogging far sooner than Lennox’s advertised 3-6 month window. Sylmar’s particulate load is among the heaviest in the Valley. A Lennox Healthy Climate MERV 11 filter that might last five months in coastal LA can be plugged solid in six weeks here after two Santa Ana events. That restriction raises static pressure and makes your ECM motor work harder than it was designed to.
- Return boot leakage on original 1950s-1970s metal ducts. Older Sylmar homes often still have their original sheet metal duct runs, and the return boot connections are the first place they fail. Gaps pull attic insulation and dust directly into the airstream and drop system static pressure. We seal these with mastic, which is the right material for the job, not tape.
- Heat exchanger surface pitting from extreme Sylmar heat waves. When temperatures hit 110+ in the northeast Valley, your Lennox furnace runs harder and longer. Over years, the heat exchanger surfaces pit microscopically, and that fine metallic dust ends up in the supply ducts. It’s not a furnace replacement issue by itself, but it does mean your ducts need more thorough cleaning than a standard maintenance plan assumes.
- Flex-duct retrofits in hillside homes pulling debris from unconditioned attic spaces. Many newer Sylmar builds on the hillsides use flex-duct runs through hot, dusty attics. When connections loosen, the negative pressure side of your Lennox system actively pulls in whatever is in that attic: blown-in insulation, rodent debris, and a fine layer of wind-driven dust.
Lennox Service in Sylmar: What Local Conditions Mean for Your Equipment
Here is something you won’t read on a generic Lennox page: Sylmar is the only Los Angeles neighborhood with an official “sundowner wind” warning zone designation from the National Weather Service. Those forecasts exist because the geography here, tucked against the San Gabriel Mountains at the northern edge of the city, creates intense downslope winds some evenings that don’t hit the rest of the Valley the same way. For a Lennox owner, that means debris loads arrive in sudden, heavy pulses, not gradually. After a strong event, we schedule video inspections so homeowners can see exactly what landed inside their return plenums overnight. The footage usually shows a fine gray layer of ash and mountain dust coating the blower compartment, even when the filter looks decent from the outside. That’s the Sylmar difference, and it’s why “once every few years” cleaning schedules don’t hold up here the way they might in, say, Encino or Sherman Oaks.
Lennox Models & Products We Service in Sylmar
Our crews work on the full Lennox residential lineup: the Signature Collection variable-speed air handlers, the Elite Series furnaces and air handlers with ECM blowers, the Merit Series builder-grade single-speed units, and the Healthy Climate filtration and UV accessory lines. When a part affects compatibility, like a Lennox OEM filter or an indoor coil component, we use Lennox parts. For duct sealing, insulation, and vent hardware, we use proven aftermarket materials that meet or exceed Lennox specs, because there is zero performance benefit to paying a factory premium for mastic. And when an older Sylmar home still has structurally sound metal ductwork, we recommend sealing and repair over replacement every time. Those original plenums were often built well; they just need a professional to close the gaps.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in Sylmar
Here are honest whole-system ranges for Sylmar, not per-vent teaser prices that balloon at the door:
- Full duct cleaning (single system, up to 10 vents): $350-$500
- Duct cleaning + blower wheel and housing cleaning: $450-$600
- Duct sealing (mastic on accessible boots and plenum connections): $200-$400 depending on access
- Evaporator coil cleaning (in-place, with video before and after): $175-$300
- Video inspection (standalone or included with cleaning): $75-$125 if booked alone
What drives the price in Sylmar is mostly access. A single-story mid-century home with a closet furnace and exposed duct runs is faster to clean than a hillside two-story with a remote attic air handler and flex-duct retrofits. Your estimate is free, written down before any work starts, and it does not change at the door. Call (661) 523-0295 for an exact quote.
Serving Sylmar, CA - Our Local Coverage Area
We’re based in the Sylmar area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs – Lennox Air Duct Cleaning in Sylmar
Yes. A variable-speed ECM blower tolerates debris less gracefully than a single-speed PSC motor. Fine dust on the wheel throws off balance, increases amp draw, and eventually shortens motor life. We clean variable-speed wheels and housings more thoroughly and check amp draw before and after, because a clean wheel should pull within Lennox’s factory spec range. If yours is louder than it used to be, call (661) 523-0295 and we’ll inspect it.
Yes, we clean ducts with UV systems in place all the time. We power down the UV lamp and follow the manufacturer’s safety procedure before any work starts in the air handler cabinet. The UV bulb itself is not a duct cleaning component, but we will inspect it and let you know if it’s approaching its rated service life, because a UV system that’s past its bulb replacement date is doing nothing for your air.
Santa Ana winds drive fine mountain dust and wildfire ash into return duct openings, and in Sylmar’s older homes with loose return boots, the negative pressure actively pulls that debris indoors-one reason Sylmar Dryer Vent Cleaning is often needed alongside duct service after major wind events. The result is rapid accumulation on blower wheels, filters, and coil surfaces, often within days of a single wind event. The visible sign is a plume of dust from your supply registers when the system starts up. That’s when you call us.
It can be, but only with proper handling. Many Sylmar homes built in the 1950s through the 1970s have duct insulation that may contain asbestos, and disturbing it is a health and safety matter, not a routine cleaning task. We never wrap, cut, or disturb that insulation. If we encounter it during an inspection, we stop, document it, and advise you on the right licensed professional to handle it before we proceed. Your family’s safety comes before any cleaning schedule.
Check the filter first. If it’s dark or clogged, replace it immediately, because running a Lennox ECM blower against a plugged filter is how you shorten motor life fast. Then check the supply registers for visible dust on startup. If you see a gray plume or smell smoke when the system runs, shut it down and call (661) 523-0295. Smoke particles are small enough to bypass many filters, and they settle deep in the duct system, the blower wheel, and the coil.
Service Areas Near Sylmar
We serve Sylmar and the surrounding northeast Valley from our Santa Clarita base. That includes Lennox service in Santa Clarita, Lennox service in Northridge, plus Granada Hills, Reseda, and Chatsworth. If you’re near any of these areas and your Lennox system is due for duct cleaning or sealing, we’re already on the way. Our full coverage is listed on our Lennox sales & service page.
Book Your Lennox Service in Sylmar Today
If your Lennox system is blowing dust, humming louder than it should, or you saw a plume from the registers after the last Santa Ana wind, call (661) 523-0295. We’ll schedule a video inspection, give you a written price before any work starts, and back the whole job with our 365-Day Done Right Promise.
Written by Roy Castellanos, Owner at Hollis Air Duct Santa Clarita, serving Sylmar and the Santa Clarita Valley since 2004.