Residential Tankless

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Gas water heaters with UEF of 0.82 or higher OR with a thermal efficiency of at least 90%. Check with your tax advisor for applicability. Local utility rebates available in limited geographical areas. See Rebate Center for details.

*For information on the Federal Tax Credit, go to: energystar.gov. Check with your tax advisor for applicability. Offer details and expiration may vary.

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Outdoor (26)

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0.90 - 9.99 (32)
0.80 - 0.89 (10)
0.00 - 0.79 (2)

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GT-540X3-NEH - Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-540X3-NEH - Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-540X3-PEH - Condensing Ultra-Low NOx Outdoor 199,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-540X3-PEH - Condensing Ultra-Low NOx Outdoor 199,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-540X3-NIH - Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-540X3-NIH - Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-540X3-PIH - Condensing Ultra-Low NOx Indoor 199,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-540X3-PIH - Condensing Ultra-Low NOx Indoor 199,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-NEH - Condensing Ultra-Low NOx Outdoor 180,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-NEH - Condensing Ultra-Low NOx Outdoor 180,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-PEH - Condensing Ultra-Low NOx Outdoor 180,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-PEH - Condensing Ultra-Low NOx Outdoor 180,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-NIH - Condensing Ultra-Low NOx Indoor 180,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-NIH - Condensing Ultra-Low NOx Indoor 180,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-PIH - Condensing Ultra-Low NOx Indoor 180,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-340X3-PIH - Condensing Ultra-Low NOx Indoor 180,000 BTU Propane Tankless Water Heater with X3 Scale Prevention Technology

GT-240X3-NEH - Condensing Ultra-Low NOx Outdoor 160,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

GT-240X3-NEH - Condensing Ultra-Low NOx Outdoor 160,000 BTU Natural Gas Tankless Water Heater with X3 Scale Prevention Technology

View All << Previous Page 1 of 5 Next >>