Outdoor Tankless Water Heater, Natural Gas, 190K BTU

Outdoor Tankless Water Heater, Natural Gas, 190K BTU
Outdoor Tankless Water Heater, Natural Gas, 190K BTU QR Code
Views: 3007 Product Code: T-K4-OS-NG


Weight:44.00 lb

Dimensions (L x W x H ): 17.00 x 14.00 x 28.00

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The T-K4-OS-NG from Takagi is an Outdoor Tankless Water Heater, Natural Gas, 190K BTU. It has a gas inputs up to 190,000 BTU per hour and an energy factor of 0.82.

Includes TK-RE02 Remote Temperature Controller.

The T-K4-OS-NG has a built-in power venting system and was designed specifically for outdoor installations. The T-K4-OS does not require any additional Category III venting or vent caps, making installation one step easier for installers.

Takagi Tankless Water Heater T-K4-OS has max GPM of 8.0GPM and four preset temperatures: 113F, 122F (default), 131F, 140F.  


  • Fully modulating, gas fired tankless water heater;
  • Outdoor installation only;

Safety Features:

  • Air-Fuel Ratio (AFR) sensor;
  • Exhaust & Water Temperature Safety Control;
  • Overheat Cutoff Fuse
  • Internal Freeze-Protection System;
  • Manual reset high limit switch;
  • Horizontal or Vertical Installation;

Specifications of Takagi T-K4-OS-NG:

  • Fuel Type: Natural Gas;
  • Max BTU Rating: 190,000 BTU/h;
  • Min BTU Rating: 11,000 BTU/h;
  • Max. Flow Rate: 8 GPM (Gallons Per Minute);
  • Water Pressure: 15 ‐ 150 psi (40 psi or above is recommended for maximum flow);
  • Energy Factor (Natural Gas): 0.82;
  • Hot/Cold Water Connections: 3/4" NPT;
  • Gas Connection: 3/4" NPT;
  • Weight: 34.6 lbs;
  • Dimensions (inches): 20.3" high x 13.8" wide x 8.5" deep;
  • Electric Consumption: 120 VAC ; Standby: 0.05 A, Operation: 0.73 A, Freeze-Protection: 0.93 A;
  • Ignition: Electric Ignition;
  • Natural Gas Pressure Inlet: 5.0" W.C. min.; 10.5" W.C. max;
  • Manifold Presure (Natural Gas): 2.5" W.C.;
  • Temperature Settings (dipswitch settings without remote controller): 113F, 122F, 131F and 140F;
  • Temperature Range (with TK-RE02 Remote Control): 99 - 167F (122F Default factory Setting);
Product Specs
Application: 2-3 Showers
Depth (Inches): 8.5"
Energy Factor: 0.82
Energy Star Rated: Yes
Fuel Type: Natural Gas
Gas Connection: 3/4"
Gas Input: 11000-190000 BTU/h
Height: 20.3"
Inlet Gas Pressure: 5.0-10.5"W.C.
Installation Type: Outdoor Only
Manifold Pressure: 2.0-2.5"W.C.
Max Flow (GPM): 8
Product Type: Tankless Heater
PSI Range: 15-150 psi
Temperature Range (F): 99°-167°F
Voltage: 120v
Water Connection: 3/4"
Weight (lbs): 38 lbs
Width: 13.8"
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