What Your Neighbors Are Saying

"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!"  

S. Spehler

"I want to thank you all for the many ways you bless this part of God's work. Today I am especially appreciative of how you maintain our heating and A/C equipment. Some of you may know that we had an accident on a street near our building and it sent a spike through our motor and board and burned them out. I am so grateful, especially when I know it is your busy time."

Long Island Youth Mentoring

"The service technician did a great job, he was excellent. I am very happy with this company compared to a local EH company I tried. I will be scheduling my spring and fall inspections with you from now on!"

K. Greenstein

"Your men were efficient and clean. They did everything in their power to make the job quick and easy."

Bob Adler, Southampton

"We have always been exceptionally pleased with the response time to our emergency needs. Thank you for your professionalism and service."

Lisa Carew, Hampton Bays

"Installers did a great job. The technician came back early the next day to replace a defective cased coil and got the A/C up and running. Thank you to all."

Joseph Methfessel, Montauk

"Have used W&G for over 20 years. Installation team was great."

George Greenberger, East Hamptom

"Thank you so much - great to have a reputable and trusted partner to do work - particularly when I have to do from a distance."

Ann Mofsit, Southampton

"Excellent response, very courteous. Very helpful and professional with system selection/replacement."

Steve Abraynon, Water Mill

"Great rep for your company, clearly better at this job than three competing reps. The team was on time, quick, and we love the system."

John Peiser, Montauk

"I have a very high opinion of W&G! I am a Long Time Satisfied customer!"

Mr. E Necarsulmer III

"The supervisor and installers are the most professional people we ever dealt with. They are the definition of excellent customer service."

Baci & Michael Horodniceanu, Southampton

"I've had the pleasure of working with many of your technicians throughout the years, and the most recent was outstanding. Thank you."

May Galatioto, Water Mill

"I was very happy with the professional salespersons. It was difficult to reach the technician for an installation date - partly my fault. I was very impressed with everyone! And very grateful!!!"

Mrs. Lori Rigano, Montauk

"W&G was professional and efficient. I don't know the names of the technicians, but they were courteous and seemed to work well together."

Anita Signorelli, Quogue

"Great Service!!"

Raul Torras, Southampton

Service Department once again was great!

"Showing up on a Saturday during JULY! Ultimately installed new compressor in record time. Great guys – great service!"

L. & D. Weintraub, Bridgehampton, NY

"Hello Weber & Grahn, I recently had an issue with my A/C unit last week in my home and had two technicians come out. Both gentlemen greatly impressed me with their knowledge and honesty in executing the task of getting my units up and running in an efficient manner. Your company is lucky to have these two men, and I recommend them highly. Thank you!"

Michael Strollo

We are happy.

“Your project manager for the installation at our home was just great, explaining everything, and on the day of the installation, came by the house many times to check on the progress. His men were nice, neat and efficient.”

M. Fuente, Manorville, NY

"I called a few companies but picked Weber & Grahn because the girls in the office were so pleasant."

Lydia Schmitt, East Hampton

"Great Group of guys. Very polite and professional, as well as your administrative staff. Thank you."

John & Margaret Maguire

He found what the problem was and fixed it.

“When the service technician came, he listened to what I had to say and went to work. He found what the problem was and fixed it. In 50 years as a homeowner, I never had a more satisfying service call.”

M. Tallon, Amagansett, NY

They were great!

“Both the customer service person & the technician who came to the homes were great, accommodating, professional, & really concerned about fixing the problem ASAP.”

A. Julius, East Hampton, NY

"Excellent Service Team. The Manager is Excellent!"

Dr.David & Claire Kirshy

Thank you for your prompt, professional service when needed.

“Jason and his co-worker did an excellent job of installing the unit, and leaving the area clean and neat.”

L. Kovarik, Riverhead, NY

"Office staff, technician, sales staff- all professional & courteous. Thank You!"

Frank Zappone

Excellent from start to finish!

"Excellent from start to finish!"

E. Johansen, East Hampton, NY

Thank You!

"Thank you!"

R. Hyde, Sag Harbor, NY

Clean, neat, professional, on time, and it works!

"Clean, neat, professional, on time, and it works!"

A. Pankin, President - Southampton Commons HOA, Southampton, NY

Highly Recommended!

"You came right away and did a great job at a fair price. Thank You!"

D. McGlasson, Westhampton Beach, NY

Love the Mitsubishi!

"The guys did a great install."

J. Jerome, Brightwaters, NY

Great Job!!!

"Service and workmanship was great. Couldn't ask for more! It's nice to know a company like yours is still around."

J. Burns, First Presb. Church, Sag Harbor, NY

Thanks, great job!

"Thanks, great job!"

Joe H., East Hampton, NY

The techs were great!

"The techs were great!"

Aid to the Developmentally Disabled, Inc, Riverhead, NY

Great Job, Great Staff!

"Great Job, Great Staff!"

John M, Southampton, NY

Thank You!

"We have not been out all winter. It appears two units were installed perfectly over the winter. Our caretaker reports."

B. Brody, East Hampton, NY

"The installer was all about customer service; a real asset to your company."

R. Shapiro

You offer the best service!

"You offer the best service!"

A. Ackerman, Sag Harbor, NY

The office staff are always pleasant to talk to.

"The technician and his partner did a great job even working in the pouring rain. And the office staff are always pleasant to talk to."

N. & J. Rubino, Riverhead, NY

Good job, Thanks alot!

"Good job, Thanks alot!"

R. Meltzer, Southampton, NY

"You came right away, did a great job at a fair price. Highly recommend you! Thank you!"

D. McGlasson

I was impressed.

"I was impressed with the courtesy and professionalism of your staff. Thank you!"

Joseph, Quogue, NY

"I've been a customer for many years and have been most impressed by the promptness and quality of service calls. In addition, the installation this year of the A/C and the gas furnace were particularly fine- putting in a gas furnace in an attic was a revelation!"


Very Happy!

"Very Happy!"

Mr. & Mrs. Maccarone, Holbrook, NY

"My heat was off for 4 days. I called W&G Service immediately. They responded quickly, diagnosed the problem, ordered the needed part and it was installed as the part arrived. Thank you!"

A. Cassels

Fantastic Experience

"Fantastic experience; our condensate pump was running continuously; called at 8:15 and by 8:45 the repair guy was here and replaced the entire pump. The unit is under warranty but still, this kind of prompt service on July 4th weekend is fantastic."

J. Bauer

Very Pleased!

"Very Pleased!"

T. Klopman, East Hampton, NY

"The technician assigned was beyond outstanding."

S. Bogner

Friendly and helpful customer service

"Friendly and helpful customer service with quick scheduling during busy season plus repairman was friendly, knowledgeable and skillful. Overall, I am pleased."

I. Pendant

Excellent Experience

"Excellent Experience!"

W. Frank, Water Mill, NY

"Overall- I was very impressed with W&G. I called for an estimate and promptly you sent someone over. They took a picture-  I had an email with a detailed estimate from your team. Installers were terrific! Very Professional Company, will definitely use again and recommend to others!"

B. McLaughlin

You did a Great Job, Thanks!

"You did a Great Job, Thanks!"

C. Sinclair, Hampton Bays, NY

Quick Service

"Thank You for your prompt attention and quick service! I will recommend your company in the future"

Ira K., Westhampton, NY

"The service technician went beyond the 'Call of Duty' by contacting me to advise me of a potential problem and possible fire hazard"


Everyone was Excellent, Thank You!

"Everyone was Excellent, Thank You!"

Led. C., Setauket, NY

"Service was excellent! Install guy was excellent! Overall Service- Excellent!!!

J. Zaluski

Rob and James were outstanding!

"Courteous, helpful, cleaned-up and were a pleasure to have in my home!"

M. Berman, East Hampton, NY

They explained the process.

"The two gentlemen were very courteous and professional. Thank you!"

Joan Z., Water Mill, NY

The two young men were terrific!

"The two young men were terrific!"

Joe G, Hampton Bays, NY

I really appreciate the efforts of the entire crew!

"Thank you. The installation was completed in one day!"

A. Snider, Southampton, NY

"You lived up to your reputation for quality work by pleasant and qualified employees; both office and on-site"

H. Kronman

They were great!

"They were great!"

B. Allen, East Quogue, NY

"Over and over I have been impressed with W & G's level of knowledge and professionalism. A joy to work with you!"


Excellent Installation!

"Excellent Installation!"

B. Walter / K. Ash, Mount Sinai, NY

" The entire staff of your company is professional, efficient, and polite. Their work as they installed the air conditioner was totally awesome!"

T. & C. DiSunno

The work was totally awesome!

"The entire staff of your company is professional, efficient, and polite. Their work as they installed the air conditioner was totally awesome!"

Thea & Carmine, East Hampton, NY

"Your gal at the front desk is amazing- one of the best multitaskers I've ever seen. I was there in person and answered multiple phone calls, did paperwork and was simultaneously attending to the purpose of my visit"

F. Conklin

Died over the weekend, new install on Monday!

"Our furnace, originally installed over 20 years ago-finally 'gave up'. Your staff and installers had a new one up and running with us in 2 days - 'died' over the weekend - install on Monday - Thank You!"

N. Peterson, Water Mill, NY

"We are pleased to see how hard & fast your workers are, plus all of them were very pleasant & respecting their co-workers as well."

H.F.Van Wyck

Thanks, Thanks, Thanks Again!

"I'm sorry I did not note the service department names. All were great working on short notice. Office staff was very good, professional!"

Paul I, Hampton Bays, NY

Everything was top notch!

"From the initial inspection on Saturday evening to the final check of the new installation on Tuesday - everything was top notch!"

B. Gray, Southampton, NY

"The Weber & Grahn experience was excellent and I'm telling all of my friends about you."


Absolutely Satisfied!

"Absolutely Satisfied!"

Jospeh B, Southold, NY

Helpful, knowledgeable, pleasant, and fast!

"Will also recommend you to others!"

C. Tagher, Speonk, NY

The crews were good!

"The crews were good and seemed to work well together. Thank You!"

J. Rocker, Amagansett, NY

All the techs were good!

"I don't remember their names, but all the techs were good!"

T. Weinberg, Montauk, NY

First rate job!

"First rate job!"

Mr. & Mrs. Specht, Hampton Bays, NY

Ray was very helpful and was responsive

"The technician was very helpful and was responsive."

D. Schoenthal, Sagaponack, NY

Everything went as smoothly as could have been imagined.

"Workers were as professional and courteous as possible. Quality of work exceptional, too. Thank You!"

B. Bennett, Holtsville, NY

The two installers were professional

"The two installers were professional, did not stop working until the installation was completed and left the area as it was before their arrival."

S. Magid, Amagansett, NY

The installation crew were excellent!

"The installation crew were excellent. They were very professional, neat, and clean."

R. Hefner, Hampton Bays, NY

"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."

J. Little


We install the best
and fix the rest.

Since 1968, Weber & Grahn has earned a reputation for excellence in designing, installing, and repairing heating and air conditioning systems, and so much more. From indoor pool dehumidification systems to creating exceptional systems that integrate with the most complex architectural designs; we are a complete design and install company. Weber & Grahn proudly services throughout the east end of Long Island such as Southampton, East Hampton, Riverhead, Smithtown, and many more areas.

Weber & Grahn’s Mission

Our philosophy is pretty straightforward. When creating a comfortable indoor environment for your family, Weber & Grahn will do so with the highest possible level of precision, professionalism, and integrity. Whether we’re handling the design and installation of an HVAC system for new construction, installing a wine system to please the most discerning connoisseur or repairing an existing system that someone else installed, we approach the job at the highest level because our reputation depends on it. After all, our success is measured by your satisfaction.


Our Services Include


We didn’t install it? No problem: we’ll still fix it.

You’ll enjoy spot-on service and maintenance from the professionals at Weber & Grahn regardless of who installed your system. We service most manufacturers, including Carrier, Trane, Bryant, Lennox, York, Rheem, and Mitsubishi. With a fleet of computerized service vans stocked with the most commonly needed parts, you can count on fast, dependable service when and where you need it.

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

Schedule a Service Appointment!

Call- 631-728-1166