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.
Before
After
Before
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Before
AfterAir Duct Cleaning Company in Greenwich, CT
Air duct cleaning in Greenwich runs $450 – $950 for most single-system homes, with backcountry estates often landing higher due to access challenges. We’re Hollis Air Duct Cleaning, and we’ve built our Greenwich work around one reality: this town’s housing stock is split between two extremes. Crews dispatch from our Hartford office, and when we drive to Greenwich, we’re either heading to a 1920s stone estate in mid-country with original gravity-duct chases hidden in plaster walls, or a 2015 condo downtown with flex duct and zoning panels. Same town, completely different job. Call us at (361) 326-5060 for a written estimate before any work starts.
Why Greenwich Homes Are Different
Greenwich sits on Long Island Sound with a coastal New England climate that hits ducts hard. Humid summers and cold winters mean condensation cycles in unconditioned spaces, and the surrounding woodlands dump pollen and leaf debris into return vents from April through October. But the real variable is the housing.
In backcountry Greenwich, we regularly find century-old stone-and-shingle estates where early forced-air retrofits left oversized, unlined duct chases inside plaster walls. These runs pass through unheated attics and stone-wall chases that stay damp all winter. Our techs pull black mold and rusted galvanized sections out of systems that look fine from the register. Meanwhile, downtown and Byram’s glassy teardowns and luxury condos, built 2000 – 2020, use flex duct and zoned systems that clog differently but access far more easily. No neighboring town has this extreme split, and it means our equipment loadout changes based on which neighborhood we’re in. We bring Rotobrush rotary systems for the newer flex-duct jobs and Nikro negative-air machines when we’re pulling decades of debris from original galvanized in mid-country estates.
Our Main Greenwich Services
Greenwich homeowners call us for three core services, each handled differently depending on whether we’re working in a backcountry estate or a downtown condo.
Air Duct Cleaning in Greenwich
Our Air Duct Cleaning in Greenwich covers the full system: supply and return trunks, branch lines, and registers. In older homes, we often start with a scope inspection because plaster-wall chases hide conditions you can’t see from the vent. Newer flex-duct systems get rotary brush cleaning with HEPA containment. Every job gets a written price before we touch anything, backed by our 365-Day Done Right Promise.
Dryer Vent Cleaning in Greenwich
Our Dryer Vent Cleaning in Greenwich addresses a genuine fire hazard that builds faster here than inland because coastal humidity makes lint cling. We see long vent runs in multi-story backcountry homes and rooftop terminations in downtown condos that require ladder work. We clean the full run from dryer to termination, test airflow before and after, and flag any damaged flex transition hose for replacement.
Duct Sealing in Greenwich
Our Duct Sealing in Greenwich targets the leaks that waste conditioned air and pull attic or crawlspace contaminants into your system. Older homes leak at joints and rust holes; newer homes leak at flex-duct connections and zoning dampers. We use mastic and mechanical sealing, then pressure-test to verify results. Written price upfront, same as every Hollis job.
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 Greenwich
We stock parts and filters for Honeywell, Aprilaire, and Guardsman systems commonly found in Greenwich homes, plus Abatement Technologies HEPA equipment for containment during cleaning. Most filter replacements and minor repairs happen same visit. See our brands for the full list.
Pricing for Air Duct Cleaning Company in Greenwich, CT
| Service | Typical range in Greenwich |
|---|---|
| Single-system air duct cleaning (standard home) | $450 – $650 |
| Single-system air duct cleaning (large home/estate) | $650 – $950 |
| Additional HVAC system (same visit) | $300 – $450 |
| Dryer vent cleaning (ground-floor termination) | $150 – $250 |
| Dryer vent cleaning (rooftop or long-run termination) | $250 – $400 |
| Duct sealing (single system, mastic method) | $400 – $700 |
| Duct sealing with post-test verification | $700 – $1,100 |
| Mold remediation add-on (localized, per area) | $200 – $500 |
| Register/boot replacement (each) | $75 – $150 |
| HEPA filtration upgrade (Aprilaire or Guardsman) | $250 – $600 |
What pushes Greenwich prices higher: estate homes with plaster-wall chases require more access work and time, and unheated attic duct runs often need mold remediation before cleaning can proceed safely. What doesn’t change: we write the price down before any work starts, and that number doesn’t move at the door. No per-vent add-ons, no surprise charges once we’re inside.
Neighborhoods We Serve in Greenwich
We work across Greenwich’s full geography, from the backcountry estates off North Street to the harbor condos in Byram. Crews typically schedule within a 48-hour window for standard cleaning, with estate jobs sometimes needing a pre-visit scope to plan access.
- Backcountry Greenwich
- Mid-Country
- Downtown Greenwich
- Byram
- Old Greenwich
Service Area – Cities Near Greenwich
Our crews cover the full Greenwich metro and surrounding towns. We regularly work in Cos Cob, CT just to the east, Old Greenwich, CT along the shore, and Stamford, CT to the west. We also serve Riverside, MD for clients with multiple properties. Scheduling runs through our Hartford office, with local crews dispatched to each job.
Serving Greenwich, CT - Our Local Coverage Area
We’re based in the Greenwich 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 Greenwich
No permit is required for standard residential duct cleaning. Duct sealing that involves structural modification or new HVAC installation may need Greenwich Building Department review, and some backcountry estates with historical covenants require HOA notification. We check these details during scheduling and handle any paperwork if needed. Call (361) 326-5060 to discuss your specific property.
Most standard cleanings book within 48 hours. Estate jobs with access challenges or mold concerns may need a pre-visit scope, which adds a few days. We don’t promise same-day dispatch, but we do promise arrival inside the quoted window, every time. Call (361) 326-5060 for current availability.
Yes. We work from downtown to the New York state line, including gated backcountry properties and waterfront homes in Old Greenwich and Byram. Our equipment trailer carries both rotary brush and negative-air systems so we’re prepared for whatever your home’s construction demands. 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 Greenwich 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.