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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AfterFast, Reliable HVAC Cleaning Across Alamo
HVAC cleaning in Alamo means getting at the coils, blower, and ducts that quietly collect Contra Costa dust, pet hair, and drywall powder from every remodel on your street. Most Alamo systems run $450 – $850 for a full cleaning, and we quote one flat price per system before any work starts. No per-vent meter running. No surprise line items once the van is in your driveway. If your system hasn’t been opened up in years, or you just finished construction, call (737) 727-2314 and we’ll tell you what we’d actually do, and what it actually costs.
Why Cardinal Air Duct Cleaning Is Alamo’s Preferred HVAC Cleaning Company
We work on a lot of Alamo systems precisely because the housing stock here is so mixed. A 1965 rancher on Stone Valley Road and a 2003 two-story near the Alamo Plaza shopping center have almost nothing in common mechanically, and cleaning both properly means inspecting first, not quoting over the phone by vent count. Our HVAC Cleaning team opens the air handler, checks the return chase, and runs a camera into the main trunk before pricing anything. That’s the Relay Standard: you get a written price before we start, a live arrival window you track on your phone, and before-and-after photos of your own ducts before we leave. Omar Haddad set the bar that way, and it applies to every booking in Alamo.
AC Cleaning in Alamo
AC Cleaning in Alamo usually means one of two situations: the air conditioner hasn’t cooled evenly since the previous summer, or a remodel just left fine dust across every register and return. The work itself is straightforward but detailed. We pull the evaporator coil cover, clean the coil and condensate pan, pull the blower assembly and clear the wheel, and then work the supply and return ducts with agitation tools while the system is under negative pressure. That last part matters: negative-pressure extraction means loosened debris is pulled directly into a HEPA-filtered vacuum, not blown back into your living room through the registers.
What it costs in Alamo
AC cleaning in Alamo typically runs $300 – $500 depending on how blocked the coil is and how much debris has accumulated in the blower wheel. That’s included in the full-system HVAC cleaning range, so you’re not paying separately unless we’re only doing the AC side.
When it’s actually needed
If your energy bills climbed through July and August while rooms stayed warm, a fouled coil is usually the culprit. Alamo’s summer heat pushes condenser units hard, and a coil that’s caked with pollen and dust transfers less heat, forcing the compressor to run longer. If you see visible dust at the registers, hear the blower struggling, or know the system hasn’t been opened in five-plus years, it’s time.
Evaporator Coil Cleaning in Alamo
Evaporator coil cleaning in Alamo is the single highest-value HVAC service for most homes here, because the coil is where cooling actually happens. When that coil is coated with a film of dust, pet dander, and the fine clay dust that drifts over from the hills, the system blows cool air over a dirty surface and efficiency drops fast. We clean the coil with professional-grade cleaners, clear the condensate pan and drain line, and make sure the coil isn’t freezing or sweating into the cabinet. In Alamo’s older systems, we often find coils that haven’t been cleaned since the unit was installed, which means years of accumulated film reducing airflow and refrigerant efficiency.
Signs your coil needs cleaning
The clearest sign is a system that runs but doesn’t cool the way it used to. Another is a musty smell from the vents, which is almost always biological growth on a wet, dirty coil. If water is pooling under the air handler, the drain line is likely clogged with the same gunk coating the coil.
Cost and timing
Evaporator coil cleaning alone in Alamo runs $250 – $400. Done as part of a full HVAC cleaning, it’s included in the system price. Most jobs take two to four hours depending on access, and Alamo homes with tight attic air handlers or second-floor units in unconditioned attics may take longer.
Trusted Brands We Service in Alamo
We work on all major HVAC brands in Alamo: Carrier, Trane, Lennox, Rheem, Goodman, and York, plus the air handlers and coils those systems use. Our technicians carry professional-grade equipment from Abatement Technologies for containment, Nikro for HEPA vacuum extraction, and stock common filters from Honeywell and Aprilaire for Alamo customers who want a filter upgrade after the cleaning. Since Alamo homes run such a wide range of equipment generations, we carry parts rather than sending you to a supply house and waiting days for a follow-up visit. Clean system first, then correct filtration for how your house actually lives.
Common HVAC Cleaning Problems We See in Alamo Homes
- Remodel dust packed into returns and trunk lines. Alamo has seen steady kitchen and addition remodels over the past decade, and drywall dust and paint overspray find their way into open ducts. That powder clings to the coil and blower wheel, and it takes agitation plus HEPA extraction to remove it completely.
- Mixed-age duct systems in one house. We regularly find original 1960s sheet-metal trunk lines with 2010s flex branches added during room additions. The metal portion may be fine, but the flex runs often sag and collect debris in low spots, starving far bedrooms of airflow.
- Fouled evaporator coils in systems that were only cleaned at the vents. A lot of Alamo homeowners paid per-vent in previous years and watched the bill climb without the coil ever being touched. The system re-contaminates itself on the next cycle, which is exactly why we price per system, not per register.
- Rodent and insect intrusions in unconditioned attics. Alamo’s hot attic spaces attract rodents in winter and desiccate the droppings into airborne dust in summer. We find nests, droppings, and insect casings in return chases often enough that we always camera the return before the cleaning starts.
Pricing for HVAC Cleaning in Alamo, CA
A full HVAC cleaning in Alamo, including AC coil, blower, and supply/return ducts, runs $450 – $850 for a typical home. That’s the whole-system price you agree to before we begin, not a starting point that grows per vent. Homes with two systems or unusually long duct runs run higher, and we’ll tell you why on the estimate. Smaller jobs are real: an evaporator coil cleaning alone is $250 – $400, an AC cleaning $300 – $500. We avoid the per-vent trap entirely. One flat per-system price, written down and handed to you before a single tool comes off the truck. Call (737) 727-2314 for a free estimate backed by camera inspection of your actual system.
We Also Serve Cities Near Alamo
Cardinal Air Duct Cleaning works throughout the Lamorinda and 680 corridor. We serve HVAC Cleaning in Alamo plus Walnut Creek, Moraga, Lafayette, and Danville. Same team, same pricing model, same single flat rate per system in every city we cover.
Serving Alamo, CA - Our Local Coverage Area
We’re based in the Alamo 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 About HVAC Cleaning in Alamo
A full HVAC cleaning in Alamo runs $450 – $850, and we don’t quote per vent because Alamo’s housing stock is too varied for that to mean anything. A 1960s rancher on Hemme Avenue has a completely different duct anatomy than a 2005 two-story off Danville Boulevard, and the per-vent model exists to run the meter up as duct runs multiply. We camera the main trunk and return chase, then give you one price for the whole system. Call (737) 727-2314 to schedule a camera inspection; the estimate is free.
Most Alamo homes need a full HVAC cleaning every 3 to 5 years, but that’s not a schedule we push on anyone. You’ll know it’s time when you see visible dust at the registers, smell something musty when the system starts, find pet hair and dander accumulating around return grilles, or just finished a remodel. If none of those apply and your system was cleaned in the last few years, the honest answer is often “not yet.” We tell you that plainly rather than selling an annual maintenance plan your ducts don’t need.
We confirm a live arrival window you track on your phone. When we arrive, the tech inspects the air handler, return chase, and a few key duct runs with a camera before pricing. Then we set the system under negative pressure with a Nikro HEPA vacuum, clean the supply and return ducts with agitation tools, pull and clean the blower wheel and evaporator coil, clear the condensate drain, and replace the filter. Before we leave, you get before-and-after photos of your own ducts and a digital invoice you can pay from a link. The entire job uses the same Abatement Technologies containment standards we use on every job.
No, and we won’t pretend to. A proper HVAC cleaning in Alamo takes two to four hours of setup, agitation, extraction, and reassembly, and doing it correctly requires booking a dedicated block of time. We schedule Alamo jobs by arrival window, not “sometime between 8 and 6,” and the Relay Standard tracking means you see exactly when we’ll be there.
Our techs run professional-grade Rotobrush agitation systems paired with Nikro HEPA-filtered vacuums for extraction, plus Abatement Technologies containment units where needed. We service all major HVAC brands including Carrier, Trane, Lennox, Rheem, Goodman, and York, and we stock Honeywell and Aprilaire filters for Alamo customers who want better filtration after the cleaning. The equipment matters because a shop-vac and a drill brush can’t pull debris out of a 40-foot trunk line under negative pressure.
Get a Flat Price Before Any Work Starts in Alamo
Call Cardinal Air Duct Cleaning at (737) 727-2314 for a free estimate on HVAC cleaning in Alamo. You’ll talk to a live person, get a written price based on camera inspection of your actual system, and know the tech’s name before they arrive. No per-vent pricing, no price changes at the door, no upsells on services your system doesn’t need.
Written by Omar Haddad, Owner at Cardinal Air Duct Cleaning, serving Alamo and the surrounding Contra Costa communities.