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Condensing Gas Tankless Water Heater

State condensing tankless water heaters are well suited for residential/commercial applications such as small restaurants and beauty salons. Remote control included as a standard feature. Indoor models are certified up to 10'100 ft. altitude. Provides a variety of installation options: outdoor and direct vent. Complies with Ultra-Low NOx regulations and meets the energy efficiency requirements of ASHRAE 90.1b-1992. Easy-Link System capable up to 4 units. Multi-Link System capable up to 20 units.

  • Ultra-Low NOx Condensing Technology Provides Unprecedented 0.95 Energy Factor
  • Primary Heat Exchanger is constructed of HRS35 Commercial-Grade Copper which is more resilient against erosion
  • Secondary Heat Exchanger is made of Type 316L Stainless Steel to protect against corrosion
  • Continuous Maximum Flow Rates up to 10.0 GPM
  • NG or LP
  • Indoor Models Includes a Built-In Temperature Controller and Advanced Diagnostics to Simplify Troubleshooting
  • Outdoor Models Include a Wall Mount Temperature Remote Controller and Advanced Diagnostics to Simplify Troubleshooting
  • Internal Freeze Protection System
MODELConfigurationMax
MBtuH
Min
MBtuH
Flow Rate
GPM
UEFTemp.
Range
Dimensions
HxWxD
Weight
Lbs.
GTS-240-NIHInterior NG 160.0 15.0 6.60 0.95 22.5x17.75x10.75 58
GTS-340-NIHInterior NG 180.0 13.0 8.00 0.95 22.5x17.75x10.75 58
GTS-540-NIHInterior NG 199.0 15.0 10.00 0.95 22.5x17.75x10.75 59
GTS-240-PIHInterior LP 160.0 13.0 6.60 0.95 22.5x17.75x10.75 58
GTS-340-PIHInterior LP 180.0 13.0 8.00 0.95 22.5x17.75x10.75 58
GTS-540-PIHInterior 199.0 13.0 10.00 0.95 22.5x17.75x10.75 59
GTS-240-NEHExterior NG 160.0 15.0 6.60 0.95 22.5x17.75x10.75 58
GTS-240-PEHExterior LP 160.0 13.0 6.60 0.95 22.5x17.75x10.75 28
GTS-340-NEHExterior NG 180.0 15.0 8.00 0.95 22.5x17.75x10.75 58
GTS-340-PEHExterior LP 180.0 15.0 8.00 0.95 22.5x17.75x10.75 58
GTS-540-NEHExterior NG 199.0 15.0 10.00 0.95 22.5x17.75x10.75 59
GTS-540-PEHExterior 199.0 13.0 10.00 0.95 22.5x17.75x10.75 59

Warranty Information

  • All Parts for 60 months -
  • Heat Exchanger for 144 months -

Available Documents