Whole-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.
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AfterLennox Air Duct Cleaning in San Diego, CA | Cardinal Air Duct Cleaning
We provide independent Lennox Air Duct Cleaning - San Diego across the region, and the one thing that sets our work apart here is understanding how coastal salt air and Lennox variable-speed blowers interact. If you own a Lennox system in San Diego, your ductwork faces conditions a generic cleaning won’t account for. Call (737) 727-2314 for a written, flat price before we touch a single vent.
Why San Diego Residents Choose Us for Lennox Service
We’ve cleaned Lennox systems in Clairemont, Mira Mesa, Point Loma, and everywhere between. Omar Haddad, our owner and lead technician, trained at Los Angeles Trade-Technical College and has spent over a decade working on residential duct systems across Southern California. What he brought to San Diego was a simple observation: Lennox high-efficiency furnaces are more sensitive to duct pressure than most homeowners realize, and our coastal air makes that worse. We’re not a franchise. We’re part of the Relay Home Co. family, founded in 2005, and every job includes a written price before work starts, a live trackable arrival time, and before-and-after photos through The Relay Standard.
Common Lennox Air Duct Cleaning Problems We Solve in San Diego
- Variable-speed blowers tripping limit switches. Lennox SL280V and EL296V furnaces modulate airflow based on pressure readings from the duct system. When return ducts are dirty or restricted, the blower works against itself and the limit switch trips, shutting down heat. We see this regularly in San Diego homes with original flex duct runs.
- Salt-crusted evaporator coils. In San Diego’s coastal neighborhoods like Ocean Beach and La Jolla, the marine layer carries salt-laden moisture that settles on Lennox cased coils. Combined with dust, it forms a crust that chokes airflow and can freeze the coil. A standard duct cleaning missing this leaves the real problem untouched.
- Sagging or torn flex duct in attics. Lennox systems in San Diego ranch-style homes often use flexible ductwork in unconditioned attics. Hot summer attic air pulls through gaps at the connection points, forcing your blower to run longer and your electric bill to climb.
- Gaps at slip-and-drive metal duct seams. We work on plenty of original Lennox metal duct sections in older San Diego homes. Thermal expansion from inland temperature swings, especially east of the 15 in areas like Rancho Bernardo, opens seams over time and leaks conditioned air into the attic.
- Collapsed return ducts from salt and dust buildup. In a 1980s ranch-style home in Clairemont, we found a Lennox Merit Series furnace with a variable-speed blower short-cycling. The original flexible return duct had collapsed under years of salt-crusted dust. After a full cleaning, we replaced the damaged section and sealed every accessible joint with mastic. The homeowner noticed the quieter blower and stronger airflow before we’d even packed up.
Lennox Service in San Diego: What Local Conditions Mean for Your Equipment
San Diego’s coastal fog and marine layer don’t just cool your afternoons. They push salt-laden moisture into attic duct systems, and that moisture accelerates corrosion on Lennox metal ductwork in a way you won’t find in El Cajon or Escondido. Flex duct insulation absorbs this damp, salty air and degrades faster than manufacturer guidelines anticipate. Practically speaking, this means Lennox owners in neighborhoods west of the 5, like Pacific Beach and Coronado, should consider duct sealing and insulation checks more often than the manual suggests. A Lennox system in Clairemont that’s five years old may show the same duct wear as a ten-year-old system in a drier inland city. This is exactly why generic cleaning checklists fall short here. We inspect for salt corrosion on metal duct sections as a standard part of every San Diego Lennox cleaning, not as an add-on.
Lennox Models & Products We Service in San Diego
We work on the full Lennox residential lineup: Dave Lennox Signature Collection models like the SL280V and SL297NV, Elite Series units including the EL296V and EL18XPV, and Merit Series furnaces like the ML180 and ML193. For critical components like blower motors and control boards, we prioritize OEM Lennox parts when available. For common wear items like flex duct, mastic sealant, and filter media, we use high-quality aftermarket equivalents to keep your bill reasonable. Our trucks carry the consumables needed for most San Diego jobs, so we aren’t running back to a supply house mid-appointment. If you need broader Lennox work beyond duct cleaning, this is Lennox sales & service at its most practical. We also perform video inspection, duct sealing, and evaporator coil cleaning as core services on every Lennox job.
Lennox Service Pricing in San Diego
Most standard Lennox air duct cleanings in San Diego run $450 to $900 for a typical single-family home, depending on square footage, number of returns, and accessibility. Evaporator coil cleaning typically adds $150 to $300. Duct sealing with mastic runs $350 to $800 depending on how many seams and joints need attention. What drives the cost: system size, how many floors, whether the ducts are accessible from the attic or crawl space, and the condition of existing flex sections. Every estimate is written before work begins and does not change at the door. If a repair is needed, you get a written guarantee and a free second visit if it fails. Call (737) 727-2314 for an exact quote on your San Diego home. Estimates are free, and a live person answers the phone.
Serving San Diego, CA - Our Local Coverage Area
We’re based in the San Diego 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 San Diego
Every 2 to 3 years is the practical answer for Lennox homes west of the 5, where salt-laden marine air settles into attic ducts and accelerates dust buildup and metal corrosion, which is why our Dryer Vent Cleaning in San Diego follows the same coastal-aware approach. Inland neighborhoods like Scripps Ranch or Poway can often go 3 to 5 years between cleanings.
Yes, especially on variable-speed models. Lennox SL280V and EL296V furnaces read pressure changes in the duct system and will trip the limit switch when return airflow is restricted. Short-cycling in a San Diego home is often a duct problem, not a furnace problem. Call (737) 727-2314 and we’ll identify the cause before recommending any work.
We use OEM Lennox parts for critical components like blower motors and control boards when availability allows. For wear items like flex duct sections and sealants, we use proven aftermarket equivalents that match OEM specifications while keeping your cost down.
Mastic sealant applied over mesh tape at every accessible seam and joint. That’s the approach we use on original Lennox slip-and-drive metal sections, which develop gaps from thermal expansion in San Diego’s inland areas. Tape alone does not hold up to attic heat.
In most cases, yes. We use negative-pressure extraction equipment from Nikro to pull debris off the coil in place, which avoids disconnecting refrigerant lines. If the coil is heavily crusted from salt and dust, removal is sometimes necessary. Call (737) 727-2314 for a free estimate on a San Diego Lennox coil cleaning.
Service Areas Near San Diego
Our San Diego crews cover the metro area and surrounding communities, including Chula Vista, El Cajon, La Mesa, National City, and Oceanside. For Lennox owners moving between markets, we also offer Lennox service in Dallas and Lennox service in Fort Worth through our network. This San Diego service area page covers our full reach in the county.
Book Your Lennox Service in San Diego Today
We’ll send a background-checked, uniformed technician to your San Diego home with a written price in hand before any work begins. Every job includes before-and-after photos and the 365-Day Done Right Promise. Call (737) 727-2314 now to schedule your free Lennox duct inspection.
Written by Omar Haddad, Owner & Lead Technician at Cardinal Air Duct Cleaning, serving San Diego since 2005.