Product Lines

Heating, Cooling, Air Quality & Water Heating Systems


Krooswyk Plumbing, Heating, and Air Conditioningstarstarstarstarhalf star4.5 / 5

19 Total Reviews Krooswyk Plumbing, Heating, and Air Conditioning


Non-Condensing Concentric Vent Tankless Water Heaters

Fully modulating' gas fired' tankless water heater with sealed combustion and power vented flue. Supplies hot water to domestic hot water systems (directly or indirectly) and can be used with water storage tanks' recirculation systems' and/or combined domestic and heating applications.

  • Copper Heat Exchanger 25x better heat transfer than stainless steel thus stabilizing outgoing water temperature quicker and reducing pressure drop across the heat exchanger
  • Built-in Freeze Protection
  • Field Convertable From NG to LP Gas
  • Inlet and Outlet Thermistors for Constant Temperature Monitoring
  • Concentric Vent Direct vent APNC35 concentric vent system' Vertical or horizontal vent termination installation' Power direct vent.
  • Residential or Commercial
MODELConfigurationMax
MBtuH
Min
MBtuH
Flow Rate
GPM
EFTemp.
Range
Dimensions
HxWxD
Weight
Lbs.
GTS-110-NI Interior 140.0 19.5 6.60 0.82 20.25x13.75x7.75 33
GTS-110-NEOutdoor 140.0 19.5 6.60 0.82 20.25x13.75x7.75 33
GTS-310-NIInterior 190.0 11.0 8.00 0.82 20.25x13.75x7.75 38
GTS-310-NEOutdoor 190.0 11.0 8.00 0.82 20.25x13.75x9.5 38
GTS-510-NIInterior 199.0 11.0 10.00 0.83 20.25x13.75x9.5 39
GTS-510-NEOutdoor 199.0 11.0 10.00 0.82 20.25x13.75x7.75 39
GTS-110U-NIInterior 140.0 15.0 6.60 0.82 20.25x13.75x9.5 33
GTS-110U-NEOutdoor 140.0 15.0 6.60 0.82 20.5x13.8x8.5 37
GTS-310U-NIInterior 190.0 15.0 8.00 0.82 20.25x13.75x9.5 37
GTS-310U-NEOutdoor 190.0 15.0 8.00 0.82 20.5x13.8x8.5 37
GTS-910-NIEAInterior 380.0 15.0 14.50 0.82 25.3x24.8x11.8 113
GTS-510C-NIInterior Concentric 199.0 15.0 10.00 0.82 20.5x13.75x10.5 51
GTS-310C-NIInterior Concentric 190.0 15.0 8.00 0.82 20.5x13.75x10.5 51
GTS-110C-NIInterior Concentric 140.0 15.0 6.60 0.82 20.5x13.75x10.5 51

Warranty Information

  • All Parts for 60 months -
  • Heat Exchanger for 180 months - 15 Years

Available Documents