Serving Suffolk & Nassau County · Long Island, NY
Mount Sinai, Suffolk County
HVAC Service in Mount Sinai, NY.
Dependable heating and air conditioning repair, installation, and emergency service for Mount Sinai homeowners. Licensed, insured, and serving Suffolk County since 2019.
What we offer in Mount Sinai
Full-Service HVAC for Mount Sinai Homes & Businesses.
Serving Mount Sinai since 2019
Your Local Mount Sinai HVAC Experts
A1 Heating & Air Conditioning has been serving Mount Sinai and the surrounding Suffolk County area since 2019. As a family-owned business, we understand the unique heating and cooling needs of Long Island homes — from older oil-heated colonials to newer construction with central air.
We also serve nearby Miller Place, Port Jefferson, Stony Brook, and Rocky Point — so wherever you are in the area, we're close by.
Common questions
HVAC Questions from Mount Sinai Homeowners
Do you offer HVAC service in Mount Sinai, NY?
Yes — A1 Heating & Air Conditioning serves Mount Sinai and surrounding communities including Miller Place, Port Jefferson, Stony Brook, and East Setauket. Call 631-331-2102 to schedule service.
Can you repair my heating system in Mount Sinai?
Absolutely. We repair and replace gas furnaces, oil furnaces, and boilers throughout Mount Sinai. We offer same-day and emergency heating service — call 631-331-2102 any time.
Do you install air conditioning in Mount Sinai?
Yes. We install central AC systems and ductless mini-splits throughout Mount Sinai. We'll assess your home and recommend the most efficient and cost-effective cooling solution.
How quickly can you respond to an HVAC emergency in Mount Sinai?
We offer 24/7 emergency HVAC service and aim to respond to Mount Sinai calls as quickly as possible. Don't wait if your heat or AC has stopped working — call 631-331-2102 right away.
Do you offer HVAC maintenance plans in Mount Sinai?
Yes. Our Platinum Membership includes annual heating and cooling tune-ups, priority scheduling, and discounts on repairs. It's the best way to keep your system running efficiently year-round.
Our Services
Nearby Service Areas
Get in Touch
Serving Mount Sinai and all of Suffolk County. Same-day and emergency service available.
631-331-2102Serving Mount Sinai & surrounding areas
Need HVAC Service in Mount Sinai?
Same-day and emergency service available. Licensed, insured, and trusted by Mount Sinai homeowners since 2019.