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 Pasadena, CA
We provide independent Lennox air duct cleaning service across Pasadena, and the one thing that separates our work here is the ductwork itself. Pasadena’s pre-1940s homes were never designed for modern Lennox equipment, which means the real job is usually cleaning the century-old chases and returns feeding your system, not just the ducts that came with it. If you own a Lennox in a Pasadena bungalow, ranch, or newer infill home, call (833) 589-9715 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Why Pasadena Residents Choose Us for Lennox Service
We’re an independent shop with no Lennox affiliation, but we’ve rebuilt our duct-cleaning practice around the Lennox split systems and packaged units that show up in Pasadena’s older bungalows and mid-century ranches. We know these cabinets, coil circuits, and variable-speed blowers well enough to clean around them without disturbing OEM components. Stan Merrick, our owner and lead technician, studied HVAC systems at Los Angeles Valley College and spent years in residential and light commercial service across the San Fernando Valley before starting Onyx Duct Cleaning. That background matters when a 1920s wall-cavity return is feeding debris into a Lennox blower. We run Rotobrush contact-cleaning systems and Nikro HEPA vacuum equipment, the same platforms restoration crews use, because Pasadena ductwork rarely responds to a light vacuum-and-blowout. We clean what’s in your ducts. We also fix what’s wrong with them.
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 Pasadena
- Short cycling and blower strain on older Lennox Merit furnaces. Pre-1940s gravity-era wall-cavity returns in neighborhoods like Bungalow Heaven simply can’t deliver the airflow a modern Lennox furnace expects. The blower strains, the system short cycles, and owners misread it as a failing motor when the real issue is a return chase packed with decades of debris.
- Dust blowing from registers on variable-speed Lennox Signature units. Santa Ana wind events drive fine ash into Pasadena return plenums, clogging Healthy Climate media filters and pushing grit past the filter rack onto blower wheels. A variable-speed blower loaded with dust loses airflow balance, which sounds and feels like a motor going bad.
- Wet evaporator coil pans feeding biological growth into the supply trunk. Pasadena’s hot, dry summers often exceed 100°F, which means Lennox condensate and coil cabinets run constantly for months. When the coil is dirty for weeks straight, condensation doesn’t drain properly and the pan stays wet. That moisture binds dust and feeds it directly into the supply side of the system.
- Sagging or torn flex duct in east Pasadena ranch homes. Many 1960s and 1970s ranches east of Lake Avenue were built with short-lived flexible duct that sags or tears over time. Paired with a newer Lennox, torn flex returns pull attic dust and insulation straight past the filter rack.
- Clogged Healthy Climate media filter cabinets during fall wildfire season. The San Gabriel Mountains sit close enough that seasonal wildfire ash settles into Pasadena ductwork every dry season. Lennox filter racks load up fast, and when the media filter can’t keep up, grit ends up on the blower wheel and evaporator coil.
Lennox Service in Pasadena: What Local Conditions Mean for Your Equipment
Pasadena’s Bungalow Heaven Historic District review means duct work visible from the street or through attic and crawl openings in those bungalows has to be handled with hand-cleaning and surface-mounted sealing rather than wholesale duct replacement. That’s a real constraint for Lennox owners. The original redwood or fir floor registers and unlined wall-cavity returns in these homes were built for gravity furnaces, not sealed modern air handlers. We regularly find those chases packed with soot from old gravity furnaces and decades of ash from nearby foothill fires. A standard truck-mounted negative-pressure cleaning won’t touch that kind of packed debris. It requires hand-wrapping the chase, HEPA vacuuming the cavity, and sealing what can be sealed without altering the historic character of the home. On a 1920s Craftsman off North Marengo, a homeowner’s Lennox Merit furnace was short cycling and blowing dust from the registers. Our tech found the original gravity-era wall-cavity return packed with soot and ash from foothill fires, pulling debris straight past the Lennox filter rack into the blower. We HEPA-vacuumed the chase, hand-wrapped the seams, cleaned the evaporator coil and blower wheel, and refit a proper Lennox-compatible filter rack. Airflow stabilized and the dust at the redwood registers dropped noticeably. That’s a signature Pasadena duct profile, and it’s why Lennox owners here need a shop that understands both the equipment and the house around it.
Lennox Models & Products We Service in Pasadena
We work on Lennox Merit Series air conditioners and matching furnaces, Lennox Dave Lennox Signature Collection variable-capacity units, Lennox Elite Series heat pumps and furnaces, and Lennox Healthy Climate air filtration and PureAir media filter cabinets. On anything with a coil, blower, or filter rack, we clean, seal, and repair before recommending replacement. We use OEM Lennox filter racks, coil pans, and mastic-compatible sealing components where fit matters, and quality aftermarket media filters or flex duct for generic runs. Our focus is the full at-risk pathway: air ducts, dryer vents, and duct repair. We show you the system, not just the invoice.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in Pasadena
Air duct cleaning for a typical Pasadena home runs $450 to $900 depending on system size, the number of returns, and how packed the ductwork is. Evaporator coil cleaning typically adds $150 to $300. Return duct cleaning runs $200 to $400. Duct sealing and repair is $300 to $1,500, depending on what’s compromised. Dryer vent cleaning runs $120 to $250. These are typical ranges, not quotes. Every job gets a written estimate before work starts, and the price is set per job by that estimate. No per-vent pricing, no teaser figures. Call (833) 589-9715 for an exact quote. Estimates are free.
Serving Pasadena, CA – Our Local Coverage Area
We serve Pasadena 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 Pasadena
Because the original gravity-era wall-cavity return in your bungalow is packed with soot and ash pulled in over decades, and your Lennox blower is drawing that debris straight past the filter rack into the supply trunk. The fix is hand-cleaning and HEPA vacuuming the chase, then sealing the seams so debris can’t keep entering. Call (833) 589-9715 and we’ll assess what’s actually in your returns.
Yes. We clean evaporator coils in place using Rotobrush contact-cleaning and HEPA extraction, which means we don’t have to break the refrigerant circuit or pull the cabinet apart. That matters on variable-capacity Signature units where disturbing OEM components risks airflow calibration and warranty issues.
It’s usually both, but the root cause in east Pasadena is the flex duct in those 1960s and 1970s ranch homes. Torn or sagging returns pull attic dust and ash straight past the filter rack, which loads the media filter faster than it should and pushes grit onto the blower wheel. We clean the returns and the coil, then check the flex runs for tears. Call (833) 589-9715 for a free estimate on a full system assessment.
Not always. If the flex is sagging but intact, we can seal and re-support it. If it’s torn or collapsed, replacement is the only fix that stops attic dust and insulation from entering the system. We only recommend replacement when the duct is genuinely failing, and we’ll show you why before any work is authorized.
Yes. Sealed returns stop hot attic air and debris from being pulled into the system, and sealed supplies keep conditioned air from leaking into unconditioned spaces. That means your Lennox works less to hold temperature, which matters when Pasadena summers run hot for months. Call (833) 589-9715 and we’ll assess what’s sealed and what isn’t.
Service Areas Near Pasadena
We serve Pasadena and the surrounding area, including North Hollywood, the NoHo Arts District, Toluca Lake, Van Nuys, and Sherman Oaks. If you’re in Pasadena, Glendale, or Burbank and need Lennox duct work done properly, we’re close enough to get there without a fuss.
Book Your Lennox Service in Pasadena Today
Clean air isn’t a luxury – it’s just what the system is supposed to deliver. If your Lennox is short cycling, blowing dust, or loading filters faster than it should, we’ll find out why. Call (833) 589-9715 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by Stan Merrick, Owner at Onyx Duct Cleaning, serving Pasadena since 2013.