Air Duct Cleaning Long Island — Nassau & Suffolk County

Yes — Long Island Air Duct Co. is a Long Island-based NADCA-certified company serving all of Nassau and Suffolk County. We cover every town from Queens border to the Hamptons, with same-week scheduling available for most areas and daily crew coverage in Nassau and Suffolk.

A proper NADCA-compliant residential duct cleaning on Long Island runs $450 to $1,100 depending on the number of vents and HVAC zones. Beware of $99 whole-house specials — those are bait-and-switch operations that clean 3 vents with a shop-vac and upsell UV lights. A real clean takes 3–5 hours with commercial HEPA negative-air equipment.

NADCA recommends every 3–5 years for a typical Nassau County home, sooner if you have pets, smokers, allergy sufferers, or recent renovation work. Nassau County's older housing stock (much of it pre-1970 Levitt-era construction) and South Shore salt-air humidity often mean cleaning is warranted on the shorter end of that range.

Yes. Long Island's coastal salt air and year-round humidity accelerate corrosion in galvanized and sheet-metal ductwork and promote mold growth in fibrous duct lining. South Shore communities from Wantagh to East Hampton see faster debris and mold buildup than inland areas — we typically recommend inspection every 2–3 years for homes within a mile of the water.

All of Nassau County (Hempstead, Oyster Bay, North Hempstead) and all of Suffolk County (Huntington, Babylon, Islip, Smithtown, Brookhaven, Riverhead, Southampton, East Hampton). Key towns include Hicksville, Levittown, Massapequa, Garden City, Huntington, Bay Shore, Commack, Smithtown, Farmingdale, Lindenhurst, Patchogue, and East Hampton. We schedule Nassau and Suffolk crews daily.

NADCA recommends every 3–5 years for a typical Long Island home, sooner if you have pets, smokers, allergy sufferers, recent renovation work, or visible dust at registers. New construction should be cleaned once before move-in.

For a standard 11–18 vent home with one HVAC zone, plan 3–5 hours on-site. Larger homes or multi-zone systems run longer. We protect the floors and furniture, set up the negative-air machine on the return trunk, brush every line, and walk you through the camera scope before we leave.

Every supply register, every return, and every main trunk. That is what NADCA certification requires. If we cannot reach a run we tell you before we quote — no surprise invoices and no skipped lines.

It can help meaningfully when dust, pet dander, mold, or rodent debris are actually in the system. We take before-and-after PM2.5 readings on request so you see the actual delta. If a customer's indoor air is already clean we tell them, not sell them something they do not need.

NADCA ASCS (Air Systems Cleaning Specialist), EPA registered antimicrobial applicator, IICRC certified for mold remediation coordination, Nassau HIC #H1851900000, Suffolk HIC #60847-H, $2,000,000 general liability, workers comp on all employees.

Yes. Every residential and commercial job gets a short camera-scope video of key runs before cleaning and after. We archive the video to a customer cloud folder so you can share it with a realtor, insurance adjuster, or just keep it for your records.

Yes — especially for homes built before 1990 in Nassau and Suffolk County. Pre-1990 Long Island homes often used galvanized steel ductwork with fibrous interior lining that accumulates decades of debris. Additionally, many were built with open attic or crawl-space return plenums that pull unconditioned air through insulation and rodent droppings. Camera-scope inspection is the only way to know what you actually have. If we scope and the ducts are clean, we tell you — we do not manufacture a sale.

NADCA (National Air Duct Cleaners Association) certification — specifically the ASCS (Air Systems Cleaning Specialist) credential — means the technician has passed a written examination on proper duct cleaning methodology, HVAC system types, contamination identification, and NADCA's ACR standard. The ACR standard defines what a proper cleaning is: negative-air machine on the return trunk, mechanical agitation of every supply and return line, and post-cleaning verification. Long Island Air Duct Co. holds active NADCA ASCS credentials and follows the ACR standard on every job.