Indoor Tankless Water Heater, Natural Gas, 140K BTU

Indoor Tankless Water Heater, Natural Gas, 140K BTU
Indoor Tankless Water Heater, Natural Gas, 140K BTU QR Code
Views: 3121 Product Code: T-KJr2-IN-NG


Weight:38.00 lb

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

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The T-KJR2-IN-NG from Takagi is an Indoor Tankless Water Heater, Natural Gas, 140K BTU. It's the smallest water heater in the Takagi tankless line with gas inputs up to 140,000 BTU per hour and an energy factor of 0.81-0.83.

Includes TK-RE02 Remote Temperature Controller.

This cost-efficient and environmentally friendly Takagi Tankless Water Heater can support hydronic baseboard or radiant floor heating applications, as well as provide domestic hot water to plumbing fixtures and appliances. Takagi T-KJr2-IN-NG can meet all the hot-water needs of a small American home or apartment with one or two bathrooms.

At an average (rise in temperature) of 60F in warmer areas Takagi T-KJr2-IN-NG Tankless Water Heater will provide 228 GPH (3.8 GPM) and enough hot water for one shower and a lavatory basin at a time; or one low-flow shower (2.5 GPM or less) and an appliance, such as a dishwasher or washing machine, at the same time. In colder areas where the input temperature may be 40F or less you can expect a flow rate of about 174 GPH (2.9 GPM) and running only one major fixture at a time. Please refer to the flow charts for specific rates. The All new Takagi T-KJr2-IN-NG has a max GPM of 6.8GPM.

Takagi Tankless Water Heater T-KJr2-IN has four preset temperatures: 113F, 122F, 131F, 140F.  

To convert the water heater from a standard vent system to a direct‐vent (or sealed combustion) system, use a TK-TV10 Direct‐Vent Conversion Kit. By default , the unit will use the intake air from the room where it is installed.


  • Fully modulating, gas fired tankless water heater;
  • Indoor installation only(Direct-vent convertible);

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;


  • Fuel Type: Natural Gas;
  • Max BTU Rating: 140,000 BTU/h;
  • Min BTU Rating: 19,500 BTU/h;
  • Max. Flow Rate: 6.8 GPM (Gallons Per Minute);
  • Min. Flow Rate: 0.75 GPM (Gallons Per Minute);
  • Water Pressure: 15 ‐ 150 psi (40 psi or above is recommended for maximum flow);
  • Energy Factor (Natural Gas): 0.81;
  • Capacity: 2 fixtures (at 60F or higher inlet water temp.) or 1 fixture (at 40F inlet water temp.);
  • Hot/Cold Water Connections: 3/4" NPT;
  • Gas Connection: 3/4" NPT;
  • Weight: 28.7 lbs;
  • Dimensions (inches): 20.5" high x 13.8" wide x 6.7" deep;
  • Electric Consumption: 120 VAC ; Standby: 0.05 A, Operation: 0.61 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): 2.0" 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);
  • Venting Intake: 3" O.D. (ABS, PVC, Galvanized Steel, Corrugated Stainless Steel or Category III/IV Stainless Steel);
  • Flue/Exhaust: 4" O.D. (Category III Stainless Steel);
  • Vent: 50' Max Length, 5 elbows max;
Product Specs
Application: 1-2 Showers
Depth (Inches): 6.7"
Energy Factor: 0.82
Energy Star Rated: Yes
Fuel Type: Natural Gas
Gas Connection: 3/4"
Gas Input: 19500-140000 BTU/h
Height: 20.3"
Inlet Gas Pressure: 5.0-10.5"W.C.
Installation Type: Indoor Only
Manifold Pressure: 2.0-2.5"W.C.
Max Flow (GPM): 6.6
Product Type: Tankless Heater
PSI Range: 15-150 psi
Temperature Range (F): 99°-167°F
Vent Size: 4"
Venting Requirement: Category III Stainless Steel
Voltage: 120v
Water Connection: 3/4"
Weight (lbs): 33 lbs
Width: 13.8"
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