Expert HVAC Contractor in Long Island, NY

Emergency heating, cooling, and water filtration service across Suffolk and Nassau counties.

5.0 Google reviews
What We Do

HVAC Contractor services in

From quick repairs to full projects, we help you choose the right hvac contractor services without pressure or guesswork.

Not sure what you need? We will assess your project at no cost.

Call (631) 875-2966
Professional HVAC technician tools and equipment arranged on a work surface, representing the trade expertise and service readiness of the company.

17+

Years Serving
Suffolk County

Our Story

Family-owned,
built on integrity

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.

Our Full Story
How We Work

How We Work

A. Monte Services follows a straightforward process to get your heating, cooling, and water systems running right. From your first call to ongoing support, we prioritize honesty and quality.

Call or Email

Contact A. Monte Services at (631) 875-2966 or amonteservices1@aol.com to describe your heating, cooling, or water system issue. We're available Monday through Friday, 8am to 5pm, with emergency service on weekends.

Assessment & Consultation

Our technician visits your home to inspect your system and discuss repair or installation options. We explain what needs to be done and answer your questions honestly.

Service & Installation

We perform the repair, installation, or maintenance work with attention to detail. Our team handles HVAC, boiler, water heater, and water filtration systems across Long Island and the Hamptons.

Follow-Up & Support

After completion, we confirm the work meets your expectations. We're available for maintenance visits and emergency calls whenever you need us.

We handle all work with integrity and efficiency. Emergency service is available weekends for urgent heating and cooling needs.

Our Work

Recent Projects in Long Island, NY

Every project in this gallery was built by our crew. Real work, real clients, real results.

Three blue HVAC units screened with louvered covers and surrounded by ornamental grasses against cedar shake home
HVAC Contractor
Mount Sinai, NY
Where We Work

HVAC Contractor Services Across
Long Island

Based in Mount Sinai — serving every corner of Long Island.

Primary Service Area

Long Island, NY

Long Island spans Nassau and Suffolk counties, stretching from Queens to Montauk Point. This diverse region includes suburban neighborhoods, waterfront communities, and rural areas. Service coverage extends across all major towns and villages.

Cities & Communities We Serve:

Garden CityHempsteadFreeportHuntingtonPort JeffersonSmithtownManhassetGreat Neck
Long Island, NY Services

Nassau County, NY

Suffolk County, NY

Hamptons, NY

Mount Sinai, NY

Oyster Bay, NY

East Hampton, NY

Montauk, NY
Client Reviews

What Suffolk County homeowners say.

5.0
3 Google reviews

Worked with us?

Leave a Review

A. Monte Services was upfront about what my system needed and did not try to oversell me. The work was clean, professional, and done right the first time.

Derek F. Google review

Our boiler stopped working on a weekend and they came out without hesitation. It is rare to find a company that actually shows up when you need them most.

Maria T. Google review

They installed a whole-home water filtration system and walked me through exactly how it works. You can tell they genuinely care about the job and the customer.

James R. Google review

Ready to become our next happy client?

(631) 875-2966
FAQ

Common Questions About HVAC Contractor in Long Island, NY

Answers to the questions homeowners ask most before hiring a contractor. Not seeing yours? Call us. We are straightforward about our process, pricing, and expectations.

We primarily serve Long Island, NY, Nassau County, NY, Suffolk County, NY, Hamptons, NY, Mount Sinai, NY, Oyster Bay, NY, East Hampton, NY, Montauk, NY. If you are outside these areas, call us. We take select projects beyond our standard service radius for the right scope.

Yes, we provide emergency HVAC service on weekends and after hours across Long Island.

We service Long Island, Suffolk County, Nassau County, the Hamptons, and surrounding areas.

Yes, we install new heating systems and handle full replacements for residential properties.

Still have questions?

Call us directly. Real answers, no scripts.

Call (631) 875-2966
Find Us

Proudly Based in Mount Sinai, NY

Stop by, call, or book online — we're always nearby when you need us.

Hours

  • Monday 8:00 AM - 5:00 PM
  • Tuesday 8:00 AM - 5:00 PM
  • Wednesday 8:00 AM - 5:00 PM
  • Thursday 8:00 AM - 5:00 PM
  • Friday 8:00 AM - 5:00 PM
  • Saturday Emergency Service Available
  • Sunday Emergency Service Available
Get Started Today

Get Your Free HVAC Estimate Today

A. Monte Services Corp. serves Long Island, NY and the surrounding area with professional HVAC Contractor services. Free estimates, clear options, no pressure.

Family-owned and operated
15+ years of experience
Emergency service available
Honest and integrity-driven
Licensed S Corp
Call (631) 875-2966

Mon–Fri 8:00 AM - 5:00 PM · Sat Emergency Service Available · Responses within 2 hrs