• Tankless Water Heaters

    ENERGY STAR®

    Tankless Water Heater Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas

    GTS-540P-NIH
    • 15 Year Limited Warranty
    • 199,000 BTU
    Where To Buy
    ENERGY STAR®

    Tankless Water Heater Condensing Indoor 120,000 BTU Natural

    GTS-140-NIH
    • 15 Year Limited Warranty
    • 120,000 BTU
    Where To Buy

    Tankless Water Heater Non-Condensing Indoor 199,000 BTU Natural Gas

    GTS-510-NI
    • 15 Year Limited Warranty
    • 199,000 BTU
    Where To Buy

    Tankless Water Heater Non-Condensing Indoor 190,000 BTU Natural Gas

    GTS-310-NI
    • 15 Year Limited Warranty
    • 190,000 BTU
    Where To Buy

    Tankless Water Heater Non-Condensing Indoor 140,000 BTU Natural Gas

    GTS-110-NI
    • 15 Year Limited Warranty
    • 140,000 BTU
    Where To Buy

    Tankless Water Heater Non-Condensing Indoor 380,000 BTU Natural Gas

    GTS-910-NIE
    • 15 Year Limited Warranty
    • 380,000 BTU
    Where To Buy