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American Condensing Ultra-Low NOx Indoor 120,000 BTU Natural Gas Tankless Water Heater

Advertised Special - $699
  • Packaging: EA
  • ENERGY STAR QualifiedThe GT-140-NIH is a new breed of tankless for smaller spaces. This model also uses existing 1/2" gas supply lines and inexpensive PVC venting to lower installation costs. 

    The GT-140-NIH supplies hot water to domestic hot water systems (directly or indirectly) which can be used with storage tanks, recirculation systems, hydronic heating systems, radiant floor systems, and/or domestic & heating applications. 

    The GT-140-NIH is a high efficient, condensing tankless water heater perfect for residential applications. With gas inputs of 120,000 BTU, the GT-140-NIH can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates.


    • ENERGY STARĀ® qualified
    • 15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications
    • .93 Energy Factor
    • Continuous Maximum Flow Rates up to 6.6 GPM
    • Copper Heat Primary Exchanger
    • Stainless Steel 316L Secondary Exchanger
    • Complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)
    • 15,000 Natural Gas BTU Input Minimum
    • 120,000 Natural Gas BTU Input Maximum
    • Condensing Indoor model
    • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes


    • Technology:Condensing
    • Fuel Source:Natural Gas
    • ENERGY STARĀ® Qualified:Yes
    • Limited Heat Exchanger Warranty:15
    • Limited Parts Warranty:5
    • Max BTUs Input:120,000
    • Emissions:Ultra-Low NOx
    • Water Connection Location:Bottom
    • Water Connection Size:3/4


    • Height:22 7/8"
    • Width:13 7/8"
    • Depth:10 13/16"
    • Weight:44 lbs.

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