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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Before
AfterAir Duct Cleaning Company in Cos Cob, CT
Air duct cleaning in Cos Cob, CT typically runs $400 – $800 for a whole-home system, with most jobs completed in a single visit. Cos Cob’s historic housing stock and coastal humidity create unique challenges that standard pricing rarely accounts for. At Hollis Air Duct Cleaning, we price every Cos Cob job in writing before work begins, and every job carries our 365-Day Done Right Promise. Call (361) 326-5060 for a free estimate.
Why Cos Cob Homes Are Different
Cos Cob sits where the Mianus River meets Long Island Sound, and that damp coastal air works its way into ductwork year-round. Summers bring humidity that fosters mold and dust-mite colonies inside supply lines; winters trap moisture in crawl spaces and chases, accelerating corrosion in older metal ducts. Homes in the Strickland Road and River Road historic districts often date to the 1700s and 1800s, with post-and-beam framing and plaster-and-lath walls that conceal original HVAC chases never designed for forced air. When these homeowners finally add central systems, technicians find decades of debris accumulated in spaces that were built for coal heat or gravity furnaces.
The east side of Cos Cob tells a different story: mid-century capes and ranches with added flex duct, retrofit jobs that mixed galvanized steel from the original build with newer materials. Our crews carry flexible cameras and low-impact rotary tools specifically to navigate these transitions without damaging fragile plaster or historic finishes. This is work that requires different equipment and a different pace than the accessible modern ductwork common in neighboring Greenwich or Stamford.
Our Main Cos Cob Services
Cos Cob homeowners call us most often for three jobs, each with its own local considerations.
Air Duct Cleaning in Cos Cob
Whole-system cleaning for Cos Cob homes means matching the method to the duct material. We use Rotobrush rotary brush systems on newer flex duct and rigid lines, switching to negative-air extraction with Nikro equipment when we’re working around fragile plaster chases in historic properties. Every job starts with a camera inspection so you see what we’re seeing before we quote. Air Duct Cleaning in Cos Cob covers our full process for antique and modern homes alike.
Dryer Vent Cleaning in Cos Cob
Cos Cob’s older homes often have dryer vents routed through thick masonry walls or extended runs to exterior walls that were never designed for modern appliances. Lint accumulates faster in these longer, winding paths, and the humid coastal air compresses the material into dense blockages. We clear the full run from appliance to termination, verify airflow with a manometer, and flag any fire-safety issues we find. Dryer Vent Cleaning in Cos Cob details our full safety check.
Duct Sealing in Cos Cob
Leaky ductwork in Cos Cob’s historic homes often means conditioned air escaping into wall cavities that were never meant to be pressurized. We apply duct sealing mastic and mechanical fasteners at joints and seams, then pressure-test the system to verify the seal holds. In homes with original galvanized steel, we also evaluate whether sections need replacement before sealing. Duct Sealing in Cos Cob explains how we stop the losses that drive up your energy bills.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Cos Cob
Our trucks stock parts and filtration products from Honeywell, Aprilaire, and Guardsman, with Rotobrush and Nikro cleaning systems ready for same-visit deployment. Most Cos Cob jobs need no return trip for equipment. See our brands for the full roster.
Pricing for Air Duct Cleaning Company in Cos Cob, CT
| Service | Typical range in Cos Cob |
|---|---|
| Whole-home air duct cleaning (single system) | $400 – $800 |
| Whole-home air duct cleaning (two systems) | $700 – $1,400 |
| Dryer vent cleaning | $150 – $275 |
| Duct sealing (per system) | $500 – $1,200 |
| Camera inspection only | $125 – $200 |
| Mold remediation add-on | $300 – $600 |
| Flex duct replacement (per run) | $200 – $450 |
| Return grille cleaning | $75 – $150 |
Cos Cob prices trend toward the higher end of these ranges when we’re working in historic districts with plaster-and-lath chases that require camera navigation and low-impact techniques. Two-system homes are common in the larger Colonials near the Mianus River. Whatever your situation, the price we write down before work starts is the price you pay. No per-vent add-ons, no equipment fees that appear mid-job.
Neighborhoods We Serve in Cos Cob
Our crews work across Cos Cob’s full residential map, from the riverfront historic districts to the post-war neighborhoods east of the Post Road. Most Cos Cob appointments are scheduled within a three-day window.
- Strickland Road Historic District
- River Road Historic District
- East Cos Cob (mid-century capes and ranches)
- Mianus River waterfront area
- Post Road corridor
Service Area – Cities Near Cos Cob
Dispatch and scheduling for Cos Cob jobs are coordinated from our Hartford office, with local crews covering the full southwest Connecticut coast. We also serve Riverside, MD, Old Greenwich, CT, Greenwich, CT, and Stamford, CT from this routing hub.
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 Company in Cos Cob
No permit is required for standard duct cleaning or dryer vent cleaning in Cos Cob. If our camera inspection reveals that duct replacement requires opening plaster-and-lath walls in a designated historic district, we flag that for your review and any necessary Historic District Commission consultation before proceeding. Call (361) 326-5060 to schedule a no-obligation inspection.
Most Cos Cob appointments are available within three business days. We do not promise same-day dispatch, but our live answering team can often accommodate urgent scheduling requests, especially for dryer vent blockages that present a fire hazard. Call (361) 326-5060 to check current availability.
We serve every Cos Cob neighborhood, from the Strickland Road and River Road historic districts to the east-side capes and ranches. Our technicians are familiar with the access and parking constraints specific to each area, including narrow driveways and limited street parking near the Mianus River. Call (361) 326-5060 to confirm coverage for your address.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Cos Cob Customers Say
"Sealed some leaking duct joints in the crawl space with mastic. Rooms that were always cold now get air."
- Ronald W."Dryer vent was packed with lint and took two hours to dry a load. Cleaned it out from the roof cap down. One cycle again."
- Paula Q."No sales pitch. Told me which parts of the system were fine and only cleaned what needed it."
- Ted L.