HVAC Contractor backed by 17+ years of local experience

A. Monte Services Corp. was built on a simple idea: do the work right, treat people honestly, and never cut corners. We are a family owned and operated HVAC and water treatment company serving Long Island, NY, with over 15 years of hands-on experience in the field. From Mount Sinai to Montauk, we have earned the trust of homeowners and property managers across Suffolk County, Nassau County, and the Hamptons by showing up, doing the job correctly, and standing behind our work.

Our founder started this business after seeing firsthand how other companies treated the trade and the people who depended on them. That experience made one thing clear: Long Island deserved better. Better service, better communication, and technicians who actually care about the outcome. That frustration became the foundation of A. Monte Services Corp., and it still drives every job we take on today.

We handle heating and air conditioning repair, installation, and maintenance for homes across Long Island. Whether your system stopped working in the middle of a cold January night or you need a full boiler installation before the season changes, we are ready to help. We also service and install water heaters, keeping your home running comfortably year-round.

Clean water matters just as much as comfortable air. That is why we offer water filtration system installation and maintenance, reverse osmosis filtration, and whole home filtration solutions. If your water tastes off or you want added peace of mind for your family, we can assess your setup and recommend the right system for your home.

Emergencies do not follow a Monday through Friday schedule, and neither do we. We offer emergency HVAC service on weekends so you are not left waiting when something goes wrong. Our regular hours run Monday through Friday, 8am to 5pm, and weekend emergency service is available when you need it most.

Honesty and integrity are not just words we put on a truck. They shape how we price our work, how we communicate with customers, and how we train and operate as a team. We do not upsell services you do not need, and we do not leave a job until it is done right. That commitment has kept customers in Oyster Bay, East Hampton, and communities across Long Island calling us back year after year.

If you are dealing with a heating issue, a failing water heater, or water quality concerns anywhere on Long Island, we are ready to help. Call us today at (631) 875-2966 or reach us by email at amonteservices1@aol.com to schedule your service or request a free estimate.