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.
Fast, Reliable Air Duct Cleaning Across Cos Cob
Air duct cleaning in Cos Cob runs $450 – $950 for a typical single-system home, and that’s a flat per-system price agreed before we touch a register. Our crews know Cos Cob well: the older colonials off Valleywood Road, the ranches near Bible Street, the split-levels tucked off Stanwich. When your vents are blowing dust across the living room, call (737) 727-2314. We’ll give you a written price before any work starts, and we’ll never change it at the door.
Why Cardinal Air Duct Cleaning Is Cos Cob’s Preferred Air Duct Cleaning Company
Cos Cob homeowners don’t have time for vague estimates or technicians who show up in an unmarked van and wing it. That’s why they call us. Every Cardinal technician is background-checked, uniformed, and you’ll know their name before they ring the bell. We run professional-grade equipment: Rotobrush rotary brush systems for agitation and Nikro HEPA-rated vacuums for negative-pressure extraction, which means loosened debris goes straight into the vacuum, not back into your living room.
The 365-Day Done Right Promise backs every job in Cos Cob. If the work isn’t right within 365 days, we come back and correct it at no charge. No fine print, no exceptions. Omar Haddad, the owner, holds every Cos Cob booking to that standard. You also get The Relay Standard on every visit: a live trackable arrival window, before-and-after photo documentation of your own ducts, and a digital invoice you can pay from your phone. Booking, tracking, paying – it all happens from the device in your hand.
Call (737) 727-2314. A live person answers 24/7. No voicemail loops, no phone tag.
HVAC Duct Cleaning in Cos Cob
HVAC duct cleaning in Cos Cob means cleaning the supply side, the return side, the air handler compartment, and the blower fan – not just the visible vent covers. For a typical Cos Cob home, that job runs $450 – $950 as a flat per-system price. You’ll know the exact number before we start.
Here’s what most Cos Cob homeowners don’t realize: the supply trunks in many pre-1950s homes here were sized for gravity heating, not the high-velocity air a modern central system pushes. That means one long basement run can take two solid hours of agitation. A company quoting you $25 per vent over the phone hasn’t seen your floor joists. We quote per system because the job is about the entire run, not the number of grilles.
What We Clean During an HVAC Duct Job
We start by cutting a small access into the main supply trunk and the return plenum, then set up a Nikro HEPA vacuum to keep the entire system under negative pressure while we run Rotobrush agitation tools through every run. The blower motor, louver surfaces, evaporator, and return filter rack all get cleaned. Then we camera-inspect the full run.
Camera Inspection on Old Galvanized Trunks
Older galvanized steel trunks in Cos Cob basement ceilings can be hiding partial collapses, separated seams, or a disconnected branch run. No amount of negative pressure fixes that. We use a video inspection to confirm your system is clear from the air handler to the far registers, and we’ll show you the footage.
Vent Cleaning in Cos Cob
Vent cleaning in Cos Cob addresses what you see every day: choked supply registers, filthy return grilles, and dust streaking across the ceiling where conditioned air blows. That same visible dust is also what’s clinging to your blower motor and evaporator coil, forcing the system to work harder and pull more amps.
One job we handled off Orchard Street stands out. The homeowner had a visible dust streak across every ceiling register and a blower motor drawing high amps. We set up negative pressure at the main trunk, worked supply and return runs with agitation tools, then camera-inspected the full path from the air handler to the farthest register. The after-photos showed bare metal where the felt-like mat of debris had been. The blower motor’s draw came back into range. That’s what a proper vent cleaning in Cos Cob looks like – proof you can see.
Supply vs. Return Vent Cleaning
Cleaning supply vents without touching the return side and blower compartment is a half job. We clean both because a dirty return side feeds debris into the filter and the blower wheel, and your newer, higher-MERV filter clogs within weeks. That’s a common call we get in Cos Cob: a homeowner who just had “the vents cleaned” and still has low airflow.
Dryer Vent Cleaning Is Separate but Related
While we’re at your place, ask about dryer vent cleaning. Lint-choked dryer vents are a fire risk and they make your dryer run forever. It’s a different run than your HVAC ductwork, and it gets its own written quote.
Trusted Brands We Service in Cos Cob
Cos Cob homes run a mix of equipment: older forced-air systems with Aprilaire or Honeywell filter housings, newer high-efficiency furnaces, and central air handlers with pleated media cabinets. We service and clean all of it. Because many Cos Cob homes still have original galvanized trunks from the 1920s – 1950s, we keep professional-grade agitation tools and replacement filter media on the truck for the brands we see most. We also use Abatement Technologies containment units on larger jobs to keep dust from migrating during the cleaning. The equipment matters. It’s the difference between actually removing debris and just stirring it around.
Common Air Duct Cleaning Problems We See in Cos Cob Homes
- Undersized galvanized supply trunks sized for gravity heat, not central air. These long, low-clearance basement runs flex when you agitate them and take real time to clean thoroughly. A per-vent quote doesn’t reflect that labor.
- Disconnected or collapsed branch runs that no amount of vacuuming will fix. We find these with camera inspection, usually in older homes where the ductwork has been tapped into for a renovation at some point.
- Clogged return air paths from years of high-MERV filters that were changed too late. The return side gets ignored by many cleaners, and the new filter clogs again in weeks.
- Mold-like residue on the evaporator coil and blower compartment in humid summers. Cos Cob’s summer humidity pushes moisture through the system, and any organic debris in the air handler turns into a problem quickly.
Pricing for Air Duct Cleaning in Cos Cob, CT
A typical full-system HVAC duct cleaning in Cos Cob runs $450 – $950. That’s a flat price per system, not a per-vent estimate, and it includes supply runs, return runs, blower compartment cleaning, and camera inspection of the full system. A smaller ranch with short accessible ductwork lands on the lower end. A larger colonial with long basement trunk runs and a finished ceiling around the ductwork lands higher. You get one written price before a single register is touched, and it doesn’t change. Free estimates are always available by phone at (737) 727-2314.
We Also Serve Cities Near Cos Cob
If you’re just outside Cos Cob, we cover Riverside, Old Greenwich, Greenwich, and Stamford. Our Air Duct Cleaning team handles the same flat per-system pricing and camera-verified before-and-after proof across the area. If you’re in Greenwich proper or down toward the Stamford line, call (737) 727-2314 to confirm coverage and get your written price.
Serving Cos Cob, CT - Our Local Coverage Area
We’re based in the Cos Cob 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 Air Duct Cleaning in Cos Cob
Every 3 to 7 years for most Cos Cob homes. If you have pets, remodel debris, or a smoker in the house, lean toward the shorter end. If you change your filter regularly and nobody in the home has allergies or respiratory issues, you can comfortably wait longer. We’ll tell you honestly if your ducts don’t need cleaning yet. Call (737) 727-2314 and we’ll talk through what you’re seeing before recommending any work.
Per system. One flat price agreed before any work starts, covering supply runs, return runs, blower compartment, and camera inspection. Per-vent pricing invites the bait-and-switch: a low teaser number that balloons once the tech sees your basement trunk. In a Cos Cob colonial with a long galvanized run, that per-vent quote won’t survive contact with your floor joists. Call (737) 727-2314 for an exact written quote – estimates are free.
We cut an access into your supply trunk and return plenum, set up a HEPA vacuum to hold the system under negative pressure, run rotary agitation tools through every run, clean the blower motor and evaporator coil, then camera-inspect the full system. You get before-and-after photos of your own ducts. The whole process typically runs 3 to 6 hours for a standard Cos Cob home. Call (737) 727-2314 to schedule your free estimate and walkthrough.
Probably not today, and we’re honest about that. Duct cleaning is a scheduled job, not an emergency call. We book in advance with a live trackable arrival window through The Relay Standard, so you know when we’re coming and can follow us en route. No four-hour windows, no phone tag. Call (737) 727-2314 to see what’s available this week.
Dryer vent cleaning is a separate service from HVAC air duct cleaning, and we recommend it at the same visit to keep clogs, longer dry times, and fire risk off the table. In older Cos Cob homes, dryer runs are often long, with bends, and they accumulate lint fast. We’ll give you a separate written quote for that run. Call (737) 727-2314 to add it to your duct cleaning booking.
Ready to get your Cos Cob ducts actually clean? Call (737) 727-2314 for a free, written estimate. A live person answers. You’ll get a flat per-system price before anything starts, camera-verified before-and-after photos of your own ducts, and the 365-Day Done Right Promise behind the work.
Written by Omar Haddad, Owner at Cardinal Air Duct Cleaning, serving Cos Cob and the surrounding Greenwich area.




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