All Seasons Air Conditioning provides expert HVAC services to Old Westbury homeowners — AC installation, ductless mini splits, AC repair, heating service, and boiler repair. Authorized Daikin dealer. Family-owned 58 years. Free estimates on all installations.
We respond within 1 business hour
Old Westbury's large estates and historic properties were built long before central air conditioning — and many rely on hot water boilers for heat, with no ductwork to carry cooled air. For these homes, ductless mini split systems are the ideal solution: whole-home or room-by-room comfort with no major construction, no damage to original interiors, and significantly better energy efficiency than window units.
As an authorized Daikin dealer, All Seasons installs and services multi-zone ductless systems sized for the larger properties common in Old Westbury — including configurations that can cool an entire estate from a single outdoor unit while maintaining independent temperature control room by room.
Installation requires only a small wall penetration — preserving original millwork, plaster walls, and architectural details in historic Old Westbury homes
Each room or zone has its own thermostat — no cooling empty rooms, no arguments over temperature. Ideal for large Old Westbury homes with varied occupancy
Daikin cold-climate heat pumps work as both AC in summer and supplemental heat in winter — reducing oil or gas usage while extending comfort season
For Old Westbury homes without existing ductwork, here's how the options compare.
From ductless installations and AC repairs to boiler service and annual tune-ups — All Seasons handles every HVAC need for Old Westbury properties of every size.
Whole-home ductless cooling for Old Westbury estates and homes without ductwork. Multi-zone Daikin systems installed without damaging original home details. Free estimates.
Fast, same-day AC repair for Old Westbury homes. All brands serviced. Transparent pricing and licensed technicians on every call.
New central AC installation for Old Westbury homes with existing ductwork. In-home estimates with proper load calculations. Authorized Daikin dealer.
Expert repair of furnaces, boilers, and heat pumps in Old Westbury. Gas and oil systems serviced. Same-day emergency heating repair available.
New high-efficiency boiler or furnace installation for Old Westbury homes. Free estimates, financing available, most jobs completed in one day.
Annual AC and heating tune-ups for Old Westbury homeowners. 21-point inspection, all brands. Maintenance plans available — we schedule your service automatically each season.
Old Westbury is one of Nassau County's most distinguished communities — an incorporated village in the Town of North Hempstead known for its sprawling estates, equestrian properties, Old Westbury Gardens, and the New York Institute of Technology campus. The village's large, older homes present unique HVAC challenges: many were built before central air conditioning, rely on oil or gas boilers for heat, and require solutions that work with the scale and character of the properties.
All Seasons has served Old Westbury homeowners since 1968. Our technicians understand how to approach large, historic, and architecturally significant properties — from multi-zone ductless installations that cool an entire estate without ductwork to boiler replacements in homes where the mechanical systems are decades old. We treat every Old Westbury home we enter with the care and professionalism the property deserves.
"Our Old Westbury home is a large older colonial with no central air and a boiler heating system. All Seasons installed a 6-zone Daikin ductless system — the installation was done perfectly, with no damage to any original details. The house is comfortable for the first time in summers."
"We called All Seasons when our oil boiler failed in February. They came out same-day, gave an honest assessment — repair wasn't worth it on a 35-year-old system — and had a new high-efficiency gas boiler installed within three days. Professional from start to finish."
"All Seasons handles all our HVAC maintenance in Old Westbury — annual AC tune-up in spring, heating check in fall. Consistent, reliable, professional. I've recommended them to several neighbors. The kind of service company you want on your speed dial."
We cover all of Nassau County — if your community isn't listed, call us. We likely serve your area.
Serving Old Westbury homeowners since 1968 — ductless installations, boiler service, AC repair, and everything in between. Free estimates, financing available, same-day emergency service.
