24/7 Emergency Service
216 East Montauk Highway, Hampton Bays, NY 11946
License #:   36162-MP   |   38242-ME

Air Conditioning, Furnaces, Boilers, and Refrigeration Services in East Hampton, Westhampton, Hamptons, Sag Harbor, Riverhead, Hampton Bays, Southampton and Surrounding Areas with Gas Heating & Geothermal Options

Long Island summers can get hot. Let one of our service technicians perform a service checkup or install a new cooling system to keep your home cool and dry.

Winters in New York are no match for your heating system. If we install a new heating system or service your existing unit, we make sure they run smoothly and efficiently.

Ben Franklin once said “An ounce of prevention is better than a pound of cure.” Weber & Grahn provides preventative maintenance plans to ensure your family is comfortable year round.

Residential Solutions

There is no job too big or too small for Weber & Grahn’s experienced engineers and service technicians setting the Gold Standard of Excellence in HVACR.

Manufacturers We Install


Air Conditioning & Heating

Weber & Grahn has been a pioneer in the industry since 1968, known for their unmatched expertise in designing, installing, and repairing heating and air conditioning systems, among many other services.

From cutting-edge indoor pool dehumidification solutions to seamlessly integrating top-notch systems with intricate architectural layouts; we are the ultimate design and installation authority.

Proudly catering to Long Island’s East End communities including East Hampton, Hampton Bays, Hamptons, Riverhead, Sag Harbor, Southampton, Westhampton, and beyond – our legacy of excellence speaks volumes.

Air Conditioning

Our dedication to providing exceptional results means our clients get dependable and efficient air conditioning solutions designed for their specific needs. With a focus on continuous improvement and customer satisfaction, we go above and beyond to exceed expectations and maintain our reputation as the Gold Standard of HVAC.

At Weber & Grahn, excellence is not just a goal — it’s a standard that defines everything we do.


W&G Service provides gas heating services like repairing and replacing gas furnaces, boilers, and converting to gas. We are Warranty Service Providers for top manufacturers, with over 50 years of experience serving clients in the east end of Long Island. Trust W&G Service for all your gas heating needs.

Ductless Mini Splits

Weber & Grahn are pioneers in ductless mini-split systems. We sell these units as heat pumps to help our clients save money and have more options for cooling and heating. Our NATE-certified technicians are skilled and experienced in custom installations for any home, no matter its size or design.

Indoor Air Quality

Our certified engineers can design and build ventilation systems for your home, including exhaust, dust collection, humidification, and dehumidification. There are different types of ventilation systems, some connected to your HVAC system and others separate. The best type for your home depends on its usage and climate. Different ventilation systems are designed for hot and humid, cold, or mixed climates like Long Island. Take the next step in improving your Indoor Air Quality and contact Weber & Grahn today!

Service & Maintenance

Properly maintained HVAC systems operate more efficiently, which can lead to lower energy bills. Regular cleaning and tune-ups ensure that the system doesn’t have to work harder than necessary to heat or cool the space.

W&G Service can provide basic maintenance or comprehensive Service Agreements that can be custom tailored to meet your specific needs. Overall, a service maintenance agreement for your system offers convenience, cost savings, peace of mind, and the assurance that your system will continue to operate efficiently for years to come.

Why Choose Weber & Grahn?

At Weber & Grahn, we believe in providing a comfortable indoor environment for your family with precision, professionalism, and integrity.

We handle tasks like designing and installing HVAC systems for new construction, installing wine systems, and repairing existing systems. We aim for excellence in every job because our reputation relies on it. Your satisfaction is how we measure our success.


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See What Your Neighbors Are Saying

Baci & Michael Horodniceanu
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The supervisor and installers are the most professional people we every dealt with. They are the definition of excellent customer service!
S. Spehler
Long Island
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All Staff personnel was extremely professional and respectful. The repair service technician was over the top with installation and explanation and going beyond the call. Extremely Satisfied, Thank you!
Steve Abraynon
Water Mill
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Excellent response, and very courteous. Very helpful and professional with system selection/replacement.
Lydia Schmitt
East Hampton
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I called a few companies but picked Weber & Grahn because the girls in the office were so pleasant!
J. Little
Long Island
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The technician was informative, professional and very nice. Work was done in a timely fashion. All technicians that worked on the job were polite and answered any questions.
Long Island
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The Weber & Grahn experience was excellent and I'm telling all of my friends about you!
H.F.Van Wyck
Long Island
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We are pleased to see how hard & fast your workers are, plus all of them were very pleasant & respecting their co-workers as well.
T. & C. DiSunno
Long Island
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The entire staff of your company is professional, efficient, and polite. Their work as they installed the air conditioner was totally awesome!
Long Island
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Over and over I have been impressed with W & G's level of knowledge and professionalism. A joy to work with you!
H. Kronman
Long Island
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You lived up to your reputation for quality work by pleasant and qualified employees; both office and on-site

Our Services include (but are not limited to)

Virtually anything that helps keep you and your family comfortable in your own home.

We Service Most Popular Brands

At Weber & Grahn, our professionals provide top-notch service and maintenance for your system, no matter who installed it. We service most brands like Carrier, Trane, Bryant, Lennox, York, Rheem, Daikin, and Mitsubishi. Our service vans are equipped with necessary parts for quick and reliable service at your convenience.






We didn't install it?
No problem! We will still fix it!

The Comfort of Knowing

Weber & Grahn

Ready To Get Started?

If you need a new system installed or an existing unit serviced, call us today!