All Seasons Air Conditioning provides expert HVAC services throughout Oyster Bay and surrounding communities — AC installation, ductless mini splits, AC repair, heating service, and boiler repair. Authorized Daikin dealer. Family-owned 58 years. Free estimates.
We respond within 1 business hour
Oyster Bay's historic homes and waterfront properties present the same HVAC challenge common throughout Nassau County's North Shore — many were built before modern central air conditioning, with boiler heating systems and no existing ductwork. All Seasons offers three installation pathways to bring year-round comfort to any Oyster Bay home.
Cove Neck is an exclusive incorporated village bordering Oyster Bay — home to Sagamore Hill, the former estate of Theodore Roosevelt, and some of Long Island's most significant historic properties. All Seasons serves Cove Neck homeowners with the same expertise we bring to all North Shore communities.
From AC installations and ductless systems to emergency heating repair and annual tune-ups — All Seasons covers every HVAC need in the Oyster Bay area, backed by 58 years of Long Island expertise.
Multi-zone Daikin ductless systems for Oyster Bay and Cove Neck homes without ductwork. Free estimates, no construction required, authorized dealer.
New central air conditioning for Oyster Bay homes with existing ductwork. In-home sizing, free estimates, financing available. Authorized Daikin dealer.
Same-day AC repair for Oyster Bay and Cove Neck homes. All brands and models serviced. Transparent pricing before work begins, licensed technicians on every call.
Expert furnace, boiler, and heat pump repair in Oyster Bay. Gas and oil systems serviced. Same-day emergency heating repair available across Nassau County.
New high-efficiency boiler and furnace installations for Oyster Bay homes. Free estimates, financing available, most replacements completed in one day.
Annual AC and heating tune-ups for Oyster Bay homeowners. 21-point inspection, all brands. Maintenance plans available — we schedule your seasonal service automatically.
Oyster Bay is both a hamlet and the seat of the Town of Oyster Bay — Nassau County's largest town by area. The community sits along the shore of Oyster Bay Harbor on Long Island Sound, known for its historic downtown, Cold Spring Harbor Laboratory nearby, the Planting Fields Arboretum, and as the location of Theodore Roosevelt's Sagamore Hill estate in adjacent Cove Neck. The area's housing ranges from Victorian-era homes in the village to large estates on generous lots.
All Seasons has been serving Oyster Bay homeowners since 1968. Our technicians are experienced with the diverse housing stock here — from century-old homes with original plaster walls (where ductless installation requires particular care) to newer construction with standard HVAC systems. We also serve Cove Neck and other surrounding communities in the Town of Oyster Bay.
"We have an older Victorian home in Oyster Bay that had never had air conditioning. All Seasons installed a 4-zone Daikin ductless system beautifully — the indoor units are barely noticeable and the installation caused zero damage to our original woodwork and plaster."
"Called All Seasons when our oil boiler in Cove Neck stopped working in December. They were out the next morning, diagnosed the issue, and installed a new high-efficiency system within two days. Efficient, professional, and priced fairly. Very impressed."
"All Seasons repairs and services all our HVAC equipment in Oyster Bay. They've caught two issues during annual tune-ups that would have become mid-season emergencies. Reliable, honest, and they clearly know what they're doing."
We serve all of Nassau County and the Town of Oyster Bay. Call us if your community isn't listed.
Serving Oyster Bay, Cove Neck, and the Town of Oyster Bay since 1968. Free estimates, financing available, same-day emergency service when you need it most.
