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 Where to Buy

The GT-540X3-NIH is well suited for residential applications. American has combined water heating and treatment in a product designed to revolutionize tankless water heating. Our new condensing gas tankless line features X3® Scale Prevention Technology to last three times longer than other tankless models without X3® Technology. Complies with Ultra-Low NOx regulations. The GT-540X3-NIH utilizes commercial-grade copper alloy for the heat exchanger tubing and are approved to work with an external recirculation pump and cross-over valve. Certified up to 10,100 ft. altitude.

 

  • X3® Scale Prevention Technology
  • 15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications
  • Commercial-Grade Copper Heat Exchanger
  • Approved to work with an external recirculation pump and cross-over valve
  • 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

Support Videos

 

Tech Specs

  • Technology: Condensing
  • Fuel Source: Natural Gas
  • UEF: 0.93
  • Digital Display: Yes
  • Limited Heat Exchanger Warranty: 15
  • Limited Parts Warranty: 5
  • Max BTUs Input: 199,000
  • Emissions: Ultra-Low NOx
  • Water Connection Location: Bottom
  • Water Connection Size: 3/4

Dimensions

  • Height: 23 5/8"
  • Width: 17 3/4"
  • Depth: 11 1/4"
  • Weight: 59 lbs.
  • Vent Size: "