Grant Heating & Cooling

Grant Heating & Cooling serves East Hampton, Southampton, and Sag Harbor as a full-service HVAC contractor. The company holds a 4.9-star rating across 15 reviews and maintains 24/7 availability including weekends and holidays. Their service menu covers air conditioning, heating, and indoor air quality solutions using equipment from Lennox, Rheem, Aprilaire, Honeywell, Bosch, ClimateMaster, Fujitsu, and Mitsubishi Ductless.

What distinguishes this contractor is their focus on Mitsubishi ductless heat pump systems alongside geothermal installations. The company emphasizes clear communication during installations, with one reviewer noting the team explained every factor involved and allowed the homeowner to make final decisions rather than pushing a predetermined approach. Their indoor air quality services address EPA-documented concerns about indoor pollution, and they offer annual maintenance programs designed to extend system life and maintain efficiency through peak seasons.

Customer stories reveal consistent attention to warranty support and diagnostic thoroughness. When a homeowner encountered an issue with a Mitsubishi heat pump system during winter 2025, the manager Nick coordinated with the manufacturer to bring in an expert, completing multiple visits under warranty coverage. Another reviewer described an installation where the crew arrived on time, voiced practical concerns about condenser placement, demonstrated exactly why certain configurations would not work, and suggested alternatives before letting the customer decide. Both reviews highlight neat work and respectful treatment of the homeowner's preferences.