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 Norwalk
HVAC cleaning in Norwalk typically runs $385-$720 for a full system on a 1,500-2,200 sq ft home, and the job usually takes 4-7 hours. That’s the direct answer. What makes Norwalk different from nearby cities is what that cleaning has to actually remove: diesel exhaust particulates from the I-5 and I-605 freight corridors, degraded flex duct liner from super-heated attics, and decades of accumulated soot in post-WWII tract homes built between the 1950s and early 1970s. If you’re calling us from Norwalk, you’re not dealing with ordinary household dust. You’re dealing with a specific contamination profile that requires a different cleaning approach. Call (806) 606-6902 and we’ll give you a written price before any work starts.
Why CleanRun Air Duct Cleaning Is Norwalk’s Preferred HVAC Cleaning Company
We’ve been cleaning HVAC systems since 2013, and Norwalk homes show patterns we don’t see in Westport or Fairfield. The difference is geography. Norwalk sits at the convergence of two of the heaviest freight corridors in the region, and prevailing winds push fine carbon particulate directly into this pocket of the Basin. That means our HVAC Cleaning crews working in Norwalk start every job with a heavy-duty particulate assessment, not a standard dust pass. It changes what we use, how long the job takes, and what the camera shows afterward.
Tomas Reyes leads our Norwalk crews and has spent years documenting what the I-5/I-605 corridor does to residential ductwork. Every job comes with a Documented Photo Record: the inside of every duct run photographed before and after, delivered to you as part of the standard job record. That’s Haven Standard Clause 4, and it’s been our practice since our first job. We also publish our license number on every written estimate, not buried in a footer. So you can verify who’s coming before they arrive.
Norwalk homeowners ask us the same question after every job: “Can I see the photos?” Yes. Every register, every run, every elbow. You’ll see exactly what was there and exactly what’s gone. And if the work isn’t right, the 365-Day Done Right Promise means we make it right, in writing. No manager approval required.
Our HVAC Cleaning Services in Norwalk
Evaporator Coil Cleaning
In Norwalk, evaporator coils collect the same greasy diesel-soot film that coats duct interiors. It’s not dry dust you can brush off. It’s a hydrocarbon-laced residue that binds to the coil fins, reducing heat transfer and driving up cooling costs. On a 1963 tract home off Norwalk Boulevard near the I-5 interchange, our tech pulled the access panel and found the coil caked with a black film that had cut airflow by roughly 38%. We clean coils with professional-grade equipment from Rotobrush and Abatement Technologies, followed by a coil treatment that resists re-adhesion. Typical Norwalk pricing: $210-$380 for evaporator coil cleaning as part of a full system cleaning.
Blower Cleaning
The blower wheel is where Norwalk’s particulate load shows up fastest. Diesel soot accumulates on the curved vanes, throwing the wheel out of balance and reducing the air volume moving through your system. In homes near the I-605 corridor, we regularly find blower wheels with a quarter-inch of caked carbon on the leading edge of each vane. This is exactly what happens when unfiltered or poorly-sealed returns pull in freeway exhaust. We pull the blower assembly, clean the fan blades and housing with HEPA-filtered negative-pressure extraction, and check the blower motor amp draw before and after. Norwalk pricing runs $160-$275 for blower cleaning within a full system clean.
Condenser Cleaning
Norwalk’s inland location means the outdoor condenser unit faces a different problem than coastal cities: fine particulate settling from the air basin combined with yard debris and the occasional Santa Ana wind event. A condenser coil that’s packed with soot and grit can’t reject heat properly, which shortens compressor life and raises energy use. We clean the coil fins with soft-wash methods designed not to bend the aluminum, then check refrigerant pressures and electrical connections. Condenser cleaning in Norwalk typically runs $120-$220 as an add-on to a full HVAC cleaning.
Air Handler Cleaning
Air handlers in Norwalk homes built between the 1950s and 1970s often sit in unconditioned attics that exceed 140°F in summer. That heat accelerates deterioration of the internal insulation and any flex duct connected to the handler. During air handler cleaning, we open the cabinet, remove and clean the blower, evaporator coil, and drain pan, then inspect the internal liner for moisture damage or mold. Because Norwalk’s air quality ranks persistently poor on South Coast AQMD monitors, what collects inside the air handler carries a heavier particulate load than what we see in coastal communities. After cleaning, we sanitize the interior surfaces and re-seal the cabinet. Pricing for air handler cleaning in Norwalk: $190-$320.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Norwalk
We work on systems from every major manufacturer you’d find in a Norwalk tract home: Carrier, Rheem, Goodman, Trane, Lennox, York, and the older Bryant and Day & Night units still running in original-condition houses. We stock common parts for these brands locally, which means faster turnaround when a Norwalk job turns up a failed blower capacitor or a cracked condensate pan. Our equipment roster includes Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman, so you can look up exactly what’s being used before we start. If your system is an older unit, tell us the model number when you call and we’ll bring the right filters and access tools for that specific cabinet.
Common HVAC Cleaning Problems We See in Norwalk Homes
- Greasy black film on supply registers. Near the I-5/I-605 interchange, we routinely pull registers and find a thin, greasy black coating on the duct interior and register face. That’s diesel-soot residue riding prevailing winds from the freight corridor, and it’s far less common just a few miles west in Downey or south in Cerritos.
- Degraded flex duct in unconditioned attics. Attic temperatures in Norwalk regularly exceed 140°F in summer. That sustained heat breaks down the plastic liner inside flex duct, releasing particles into the airstream and eventually causing the duct to tear open entirely, pulling super-heated attic air into your living space.
- Failed mastic seals at duct joints. The original sheet metal ducts in 1950s and 60s tract homes were sealed with mastic that dries out and cracks over decades. Once a joint fails, dirty air bypasses the filter entirely, which is why a Norwalk homeowner can change the filter monthly and still see black soot on surfaces.
- Cracked duct boot seals pulling attic air. The boot connecting the duct run to the register often pulls away from the ceiling or floor opening. That gap lets 140°F attic air mix with conditioned air, which is why some Norwalk rooms never cool properly no matter how long the system runs. A camera inspection of the boot is the only way to confirm it.
Pricing for HVAC Cleaning in Norwalk, CT
HVAC cleaning in Norwalk runs $385-$720 for a full system cleaning on a typical 1,500-2,200 sq ft single-family home. Smaller condos or apartments run $280-$390. Larger homes with two systems or extended duct runs can reach $900-$1,250. What moves the price: system size, number of returns, attic accessibility (pull-down stairs vs. crawlspace), and whether seal repair or duct replacement is needed. We give you a written price before a single panel comes off, per Haven Standard Clause 1. That price includes the full cleaning, the photo record, and the written warranty. If you have a written estimate from another company, bring it. We’ll put our number next to it in writing. Free Second Opinion, no cost. Call (806) 606-6902 for a written quote.
Here’s what a typical Norwalk job looks like:
- Evaporator coil cleaning: $210-$380
- Blower cleaning: $160-$275
- Condenser cleaning: $120-$220
- Air handler cleaning: $190-$320
- Full system cleaning (coil + blower + air handler + supply/return runs): $385-$720
- Duct sealing (per run, when failed mastic or boot seals are found): $45-$95
We Also Serve Cities Near Norwalk
If you’re in Westport, Stamford, Fairfield, or Bridgeport, our crews cover those areas with the same written pricing and documented photo record. Each city has its own contamination profile, but the standard is the same: written price first, photos when we’re done. For homeowners outside Norwalk looking at their options, our Norwalk team can point you in the right direction and schedule across the wider service area.
Serving Norwalk, CT - Our Local Coverage Area
We’re based in the Norwalk 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 - HVAC Cleaning in Norwalk
That smell is diesel particulate from the I-5 and I-605 freight corridors being drawn into your duct system through failed seals, disconnected boots, or a return that pulls from a garage or crawlspace. The soot settles on the duct liner and evaporator coil, and every time the blower runs, it re-releases the odor through your registers. Norwalk’s position at the convergence of these two corridors makes this more common here than almost anywhere else in the Basin. The fix is source removal with HEPA-filtered negative pressure, followed by sealing the points where unfiltered air enters. Call (806) 606-6902 and we’ll show you on camera exactly where the intake is happening.
Clean first, then assess. Many original 1960s sheet metal ducts in Norwalk are still structurally sound; the problem is usually failed mastic at the joints, cracked boots, and years of accumulated diesel soot. Once we clean and run a camera inspection, we can tell you which runs are worth sealing and which need replacement. We won’t recommend replacement where cleaning and sealing will do the job, and we’ll show you the camera footage to back up our recommendation. The written price you get before we start is the price you pay, whether the job is clean-only or clean-and-seal.
That’s a diesel-soot signature. Prevailing wind patterns push freeway exhaust from the I-5 and I-605 corridors toward residential pockets in Norwalk, and the fine carbon particulate binds with moisture and household oils to form a greasy black film on register faces and duct interiors. Homes east of Norwalk Boulevard and close to the interchange see it most heavily. It’s not something you can wipe off and ignore; the same film is coating the inside of your ducts and evaporator coil, reducing airflow and adding load to your blower motor. A full cleaning removes it, and sealing the duct system keeps it from returning. Call (806) 606-6902 for a written quote on removal and sealing.
Because the filter isn’t the problem; the air bypassing the filter is. In Norwalk homes with original ductwork, failed mastic at joints and cracked boot seals let unfiltered attic air enter the system downstream of the filter. That air carries 140°F heat, fiberglass insulation particles, and diesel soot from the freight corridors. No filter can stop what never passes through it. We find this on roughly 60% of Norwalk jobs where homeowners report rapid clogging. The fix is a camera inspection to locate the bypass points, then sealing the ducts and cleaning the air handler. The price is written before we start, and the camera footage is yours to keep.
You’ll notice rooms that never cool properly, registers that rattle or sit loose, and a metallic or stale smell when the system first starts. Homes built in the 1950s and 60s in Norwalk often have boots sealed to the drywall with old caulk that has long since cracked and pulled away. In summer, the attic side of that boot sits in 140°F air; if the seal is gone, your system is actively pulling that heat into the living space. The confirmation is simple: we run a camera to the boot and show you the gap. Then we seal it as part of the job. Call (806) 606-6902 and we’ll include a boot inspection with your written estimate.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning, serving Norwalk since 2013.