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American GT-140-NIH Condensing Ultra-Low NOx Indoor Tankless Water Heater

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Price: $960.00
Item Number: GT140NIH
Manufacturer Part No: GT140

American GT-140-NIH Condensing Ultra-Low NOx Indoor Tankless Water Heater - 120,000 BTU - Natural Gas

Installation Manual
Specification Sheet

The 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. 

  • ENERGY STAR® qualified
  • 15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications
  • Copper Heat Primary Exchanger
  • Stainless Steel 316L Secondary Exchanger
  • Complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)
  • Condensing Indoor model
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes


  • Technology:Condensing
  • Fuel Source:Natural Gas
  • UEF:0.90
  • ENERGY STAR® Qualified:Yes
  • 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.
*Warranty not included*

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