Grant Heating & Cooling, Inc.

Since 1969, we’ve helped homeowners and businesses in East Hampton and the surrounding Suffolk County area stay comfortable with heating, cooling, and indoor air quality services tailored to their needs. Our services include furnace repair, replacement, and installation; boiler repair and replacement; AC and ductless mini-split repair; water-heater repair; heat-pump repair, conversion, and maintenance; and radiant-floor heating installation and service. We also provide ductwork installation, replacement, repair, sealing, insulation, and cleaning. Whether someone needs a maintenance check, an emergency heating or AC repair, or help selecting a new system, we begin by learning about the building and explaining the available options and potential costs.

We are also specialists in geothermal heat pumps and loops. We can manage geothermal projects from system design through installation and repair, including retrofits for existing homes and systems planned as part of new construction. We provide complimentary geothermal installation quotes and explain how a proposed system may affect comfort, efficiency, and costs. Financing offers and discounts may also be available. For ongoing care, we offer maintenance for geothermal and conventional heat-pump systems, with inspections that can identify airflow issues, leaks, and potential failure points.

Our philosophy is simple: we treat our customers as we would want to be treated. That means arriving on time, coming prepared, respecting each property, doing quality work, and providing individualized service rather than a one-size-fits-all recommendation. We take a comprehensive look at HVAC and ductwork concerns before presenting a solution. When the work is finished, customers pay the amount agreed upon in advance. Our installations and repairs are backed by a comprehensive satisfaction guarantee, and all service comes with a warranty. We are fully licensed and insured, and we’re proud to have loyal customers throughout East Hampton, Southampton, and Sag Harbor. To discuss an HVAC or geothermal need or schedule service, call us at (631) 324-0679.