Cohasset homeowners trust Delgado Air Duct Cleaning because we show up with EPA-registered equipment and IICRC-trained crews before the first Nor’easter rolls in. We clean ducts in Cohasset homes from Atlantic Avenue to Jerusalem Road, and we don’t just remove dust—we stop winter allergens and salt corrosion before they start.
1. Your Cohasset home smells like old salt air even when the windows are closed
If your home near Lighthouse Beach or along Chestnut Street smells musty or salty even with the windows shut, your ducts are likely harboring moisture-laden ocean air. Cohasset’s coastal humidity and winter salt spray get pulled into your HVAC system and settle inside ductwork. Delgado uses negative-air machines and HEPA vacuums to remove salt crystals and organic growth before they circulate through your home. A quick sniff test: if the smell lingers after running the heat for 30 minutes, it’s time to schedule a cleaning. We also recommend our whole-home air quality services to protect against future salt corrosion.
A duct cleaning is simply removing dust, pollen, and other debris from your home’s HVAC ductwork using specialized tools and negative air pressure.
The IICRC defines air duct cleaning as the mechanical removal of contaminants from ductwork, diffusers, grilles, and HVAC equipment. Delgado follows S520 standards, using truck-mounted vacuums and rotary brushes to dislodge buildup without damaging ducts. We focus on Cohasset’s older homes, many built before 1980, where decades of dust and insulation fibers have settled in the bends of ductwork near Beechwood Street and School Street. Our process includes a pre-inspection camera to show you exactly what’s inside before we begin. See our full list of services.
2. Your allergies flare up every time you turn on the heat in your Cohasset colonial or ranch
If your allergies act up the moment you switch from AC to heat, your ducts are circulating allergens that have been sitting dormant since spring. Cohasset’s fall ragweed and mold spores get trapped in ductwork and are blasted through vents when the furnace kicks on. Delgado’s cleaning removes pollen, pet dander, and mold spores that collect in ducts serving homes from North Main Street to Meetinghouse Lane. We also seal gaps in ductwork to prevent future infiltration. Ask us about our air purifier add-ons to keep indoor air clean year-round.
3. You notice black dust or rust-colored streaks around vents in your Cohasset kitchen or bathroom
Black dust or rust streaks around vents in kitchens or bathrooms near Atlantic Avenue or Front Street signal mold growth or corroded ductwork. Cohasset’s older duct systems, especially those with fiberglass insulation, trap moisture and promote mold. Delgado uses antimicrobial treatments to kill mold and rust inhibitors to protect metal ducts. We also recommend checking for water leaks near vents, as Cohasset’s humid climate can cause condensation inside ductwork. A quick wipe test: if the dust wipes away easily, it’s likely mold; if it’s gritty, it’s rust. For details, see request a free estimate / contact us.
4. Your energy bills spike in October even though you haven’t changed your thermostat settings
A sudden 15–20% increase in your October energy bill in Cohasset often points to dirty ducts forcing your furnace to work harder. Restricted airflow from clogged ducts near Chestnut Hill or Governor’s Lane means your system runs longer to reach the same temperature. Delgado’s cleaning restores airflow and can lower your heating costs by up to 20%. We also check for duct leaks, which are common in older Cohasset homes and can account for another 20–30% loss in efficiency. Schedule a cleaning now to avoid winter sticker shock.
5. You see visible mold or water stains inside ductwork during routine HVAC maintenance
If your HVAC technician points out mold or water stains inside ducts during a fall tune-up, it’s a clear sign you need professional cleaning. Cohasset’s damp autumns and winter salt spray can cause condensation inside ducts, especially in homes near the coast. Delgado uses moisture meters and borescopes to inspect ducts before cleaning, ensuring we remove all mold and dry the system thoroughly. We also recommend installing a whole-home dehumidifier to prevent future growth. Don’t wait for the mold to spread—act before winter sets in.
6. Your Cohasset home’s air feels stale or stuffy within hours of closing the windows
If your home near Cohasset Harbor or Sandy Bay feels stuffy even with the windows closed, your ducts are likely circulating stale air. Cohasset’s tight homes trap indoor pollutants, and dirty ducts exacerbate the problem. Delgado’s cleaning removes dust, pet dander, and other pollutants that accumulate in ducts over the summer. We also recommend running your HVAC fan for 15 minutes daily to improve airflow. A quick test: if the air feels heavier after running the fan, it’s time to clean your ducts.
7. You’re planning fall renovations or preparing to host Thanksgiving in your Cohasset home
Before you host family for Thanksgiving in your Cohasset home, schedule a duct cleaning to ensure your guests breathe clean air. Renovations stir up dust that gets trapped in ducts, and holiday cooking adds grease and odors to the mix. Delgado cleans ducts in homes from North River Street to Schoolhouse Road and offers same-day appointments for last-minute prep. We also recommend changing your HVAC filter before guests arrive to keep air fresh. Don’t let dust or odors ruin your holiday—book a cleaning now.
| Home Size (sq ft) | Average Cost Range | Typical Time | When to Schedule |
|---|---|---|---|
| Under 1,500 | $250–$400 | 2–3 hours | September |
| 1,500–2,500 | $400–$600 | 3–4 hours | October |
| 2,500–3,500 | $600–$800 | 4–5 hours | Late September |
| Over 3,500 | $800–$1,200 | 5–6 hours | Early September |
Frequently Asked Questions
Why do Cohasset homes need duct cleaning more often than inland homes?
Cohasset’s coastal humidity and salt spray accelerate dust buildup and corrosion in ductwork. The U.S. Environmental Protection Agency notes that homes within 10 miles of the coast often require more frequent duct cleaning due to salt and moisture infiltration.
How can I tell if my ducts are leaking salt air into my Cohasset home?
Look for rust streaks near vents or a salty smell near duct registers. Delgado uses smoke pencils to trace airflow and identify leaks in ducts serving homes along Atlantic Avenue and Front Street.
What’s the best time of year to clean ducts in Cohasset before winter?
Schedule a cleaning in late September or October to remove summer dust and prepare for winter allergens. Delgado offers free estimates and same-day appointments for Cohasset homes.
Do duct cleaners in Cohasset also inspect for mold or asbestos?
Yes. Delgado follows the CDC's cleaning guidance and uses borescopes to inspect for mold, asbestos, and other hazards. We also test for asbestos in older homes before cleaning.