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 Old Greenwich
Air duct cleaning in Old Greenwich typically runs $350 – $650 for a full residential system and is usually completed in three to five hours. Most homeowners schedule after noticing musty odors, reduced airflow, or following a renovation in one of the area’s historic homes.
We know Old Greenwich. Our crews dispatch from the Hartford office and serve the 06870 zip code regularly, from the shoreline cottages along Long Island Sound to the Colonials back near Binney Park. Roy Castellanos and our team have walked enough basements and attics here to recognize the patterns: unlined metal ducts from the 1930s, asbestos wrapping that needs testing before we touch it, and the particular mustiness that settles in after a damp Connecticut winter. When you call (361) 326-5060, a live person answers, and we’ll give you a written price before any work starts. No estimates that balloon once we’re inside.
Why Hollis Air Duct Cleaning Is Old Greenwich’s Preferred Air Duct Cleaning Company
Old Greenwich homeowners don’t hire us because we’re the cheapest. They hire us because the price we write down is the price they pay, and because our Air Duct Cleaning team shows up in uniform, background-checked, and on time. The Garrison Standard means arriving inside the quoted window, pricing in writing, completing the job by the book, and leaving the site clean. Roy Castellanos built this operation on that discipline.
We’ve earned a strong local reputation across Fairfield County by doing what we said we’d do. Our technicians carry Rotobrush rotary brush systems and Nikro negative-air machines, the same equipment commercial crews use, and they know how to handle the fragile materials common in Old Greenwich’s pre-1950 housing stock. Calls are answered by a live person 24 hours a day, 7 days a week, no voicemail loops.
Our 365-Day Done Right Promise covers every job in writing. If the work fails within a year, we return and make it right at no charge, including a free second visit. That’s not marketing language, it’s the actual agreement you sign before we start.
Air Duct Cleaning Services in Old Greenwich
Air Duct Cleaning Services in Old Greenwich address the specific buildup that occurs in older homes with unlined ductwork, plaster walls, and retrofitted HVAC systems. The job involves connecting a negative-air machine to your trunk line, agitating debris with a rotary brush system, and extracting it through filtered collection. A typical residential full-system cleaning in Old Greenwich runs $350 – $650, with larger estates or homes with asbestos-wrapped ducts falling toward the higher end after required testing and containment.
Residential Duct Cleaning
Most Old Greenwich homes were built before 1950, with original hardwood floors and plaster walls that shed fine particles into unlined metal ducts. Our residential service covers supply and return lines, trunk ducts, and accessible registers, using HEPA filtration to protect your interior air during the process.

Commercial Duct Cleaning
Local businesses along Sound Beach Avenue and in the village center need scheduled cleanings that don’t disrupt operations. We coordinate after-hours or weekend service, with written pricing agreed in advance and documentation provided for property management records.

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.
HVAC Duct Cleaning in Old Greenwich
HVAC Duct Cleaning in Old Greenwich requires extra care because the region’s coastal humidity and salt air accelerate corrosion inside metal ductwork, while pollen from nearby oak and maple trees clogs filters and settles in returns. The work involves inspecting the full system, sealing access points properly after cleaning, and testing airflow balance before we leave. A standard HVAC duct cleaning for an Old Greenwich home runs $350 – $550; systems with significant mold remediation needs or asbestos-wrapped components can reach $650 – $850 after required testing and safe handling.
Video Inspection and Documentation
We feed a camera through your ductwork before and after cleaning, so you see the condition we found and the results we delivered. In Old Greenwich’s older homes, this often reveals disconnected ducts, collapsed sections, or asbestos wrapping that needs addressing before cleaning proceeds.
Supply and Return Line Cleaning
Supply lines push conditioned air into your rooms; returns pull it back. Both accumulate different contaminants. Returns near kitchens and bathrooms in Old Greenwich homes often show grease and moisture residue, while supplies collect the fine plaster dust this area’s homes generate year after year.
Trusted Brands We Service in Old Greenwich
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation, Nikro negative-air machines for controlled extraction, and filtration products from Honeywell and Guardsman. We stock parts and materials locally for fast turnaround on Old Greenwich jobs, and our technicians are trained on the specific configurations common to the area’s mixed-era HVAC systems. Whether your home runs a modern high-efficiency unit retrofitted into a 1920s Colonial or an original oil-fired system with decades of accumulated debris, we have the tools to clean it properly without damaging fragile, historic components.
Common Air Duct Cleaning Problems We See in Old Greenwich Homes
- Mold and mildew from Long Island Sound humidity. Old Greenwich’s coastal location traps moisture inside unlined metal ducts, especially in basement runs and crawl spaces. We test for active growth and treat affected areas before mechanical cleaning begins.
- Asbestos-wrapped ducts in pre-1950 homes. Many properties near Shore Road and along the village’s interior streets still have original asbestos insulation on ductwork. Our technicians test and handle these per Connecticut DPH regulations, adding necessary containment and disposal time to the job.
- Construction debris from renovations. Expanded kitchens, finished basements, and updated HVAC systems in Old Greenwich estates often leave drywall dust, insulation fragments, and sawdust inside existing ductwork that was never properly sealed during construction.
- Salt air corrosion and pollen accumulation. Coastal salt accelerates rust inside metal ducts, while oak and maple pollen from the area’s mature tree canopy filters through returns and compiles on duct walls, reducing airflow and aggravating allergies.
Pricing for Air Duct Cleaning in Old Greenwich, CT
We don’t do per-vent pricing, and we don’t bait you with a low coupon that triples at the door. One flat price per system, agreed in writing before work starts.
| Service | Typical Range in Old Greenwich |
|---|---|
| Residential full-system cleaning | $350 – $650 |
| HVAC duct cleaning (standard home) | $350 – $550 |
| Homes with asbestos-wrapped ducts (includes testing/containment) | $650 – $850 |
| Video inspection add-on | $75 – $125 |
| Commercial system cleaning | $500 – $1,200 (varies by square footage) |
What moves you within these ranges: system size, accessibility, presence of asbestos requiring testing, and whether mold remediation is needed before mechanical cleaning. Every estimate is free, and every price is written down before we start. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Old Greenwich
Our crews work throughout lower Fairfield County, including Old Greenwich and neighboring Riverside, Cos Cob, Stamford, and Greenwich proper. Scheduling is coordinated from our Hartford office, with local crews dispatched to your area. We also handle Dryer Vent Cleaning in Old Greenwich and Duct Sealing in Old Greenwich for homeowners looking to address the full system, not just the ducts.
Serving Old Greenwich, CT - Our Local Coverage Area
We’re based in the Old 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 in Old Greenwich
We typically schedule Old Greenwich appointments within three to five business days, with flexibility for urgent situations like post-renovation cleanouts or visible mold concerns. Call (361) 326-5060 for current availability, estimates are free.
Yes, we work throughout the 06870 zip code, from the shoreline properties along Long Island Sound to the interior streets near Binney Park and the village center. Our technicians are familiar with the access challenges and parking constraints specific to each area.
We do not advertise emergency duct cleaning because it is a scheduled, methodical job that cannot be rushed safely, especially in homes with potential asbestos. For urgent air quality concerns, we prioritize the next available appointment and advise on interim steps you can take.
Old Greenwich pricing aligns with Fairfield County generally, though homes here more often require asbestos testing and careful handling of fragile, historic materials, which can add $200 – $300 to jobs with wrapped ducts. We disclose this during your free estimate, never at the door.
Every job is backed by our 365-Day Done Right Promise in writing. If the cleaning fails to resolve the issue within a year, or if a connected component we serviced fails, we return and make it right at no charge, including a free second visit. Call (361) 326-5060 for details.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Old Greenwich and Fairfield County since 2004.




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