Grant Heating & Cooling, Inc. has served East Hampton and the East End of Long Island for over 57 years, delivering geothermal heat pump installation, repair, and maintenance alongside full HVAC services. The company operates a dedicated geothermal services division covering system design, ground loop coordination, heat pump selection, and long-term maintenance for residential and commercial properties. Grant is a WaterFurnace-confirmed dealer and also carries ClimateMaster equipment, giving customers access to leading ground source heat pump brands. Their service area spans East Hampton, Southampton, Sag Harbor, Montauk, Wainscott, Shelter Island, and surrounding East End communities. For homeowners evaluating geothermal conversion, Grant provides detailed savings projections and oversees the full installation process from permitting through commissioning.
Verified active operator per https://www.granthvac.com/geothermal-service + WaterFurnace dealer locator (Bundle 6 audit 2026-05-29)
East Hampton-based HVAC contractor with specialized expertise in managing coastal weather exposure and varied home construction types across the East End.
