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    No matter the season outside enjoy indoor comfort all year long. For years to come.
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Heating & AC Service

Corner Stone Heating & Cooling Inc. believes in precision furnace and A/C tune-ups. Our expert furnace and A/C services improve performance and extend system life.

Cornserstone, Heating, Air Conditioning, Service

Heating & Air Conditioning Service

Heating & AC Replacement

Do you need to replace your older furnace, boiler, or air conditioning system? Corner Stone Heating & Cooling experts will help you choose the right system, and handle installation.

Cornerstone - Heating, Air Conditioning, Replacement

Furnace Replacement | AC Replacement

Indoor Air Quality

An AccuClean™ Whole Home Air Filtration System removes up to an unprecedented 99.98% of unwanted particles and allergens from the filtered air in your home.

Cornerstone Heating & Cooling, Indoor Air Quality

Learn More About Indoor Air Quality

In a world of poor service, dealing with Corner Stone was a breath of fresh air. Corner Stone is fully knowledgeable about the product, which gives...
— Roger & Roberta E.
Altamont, NY
I was pleased with the very good, prompt, clean and professional work. ​The installation was very neat.
— William A.
Medusa, NY
​Fantastic! If I knew it would be that easy, I would have tackled this project sooner. Working with Corner Stone was a very positive experience....
— Erin H.
Delmar, NY
Installation was excellent. Quality of work and service was excellent. Joe was great to work with. Very customer oriented and knowledgeable.
— Dave & Betty W.
Delmar, NY