Outdoor Takagi T-K4-OS-NG Tankless Water Heater, Natural Gas, 190K BTU

Outdoor Takagi T-K4-OS-NG Tankless Water Heater, Natural Gas, 190K BTU

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

Availability: In Stock

Weight:44.00 lb

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

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Takagi T-K4-OS-NG Tankless Water Heater with 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
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
Water Connection:3/4"
Weight (lbs):38 lbs
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