Outdoor Takagi T-KJr2-OS-NG Tankless Water Heater, Natural Gas, 140K BTU

Outdoor Takagi T-KJr2-OS-NG Tankless Water Heater, Natural Gas, 140K BTU

Outdoor Takagi T-KJr2-OS-NG Tankless Water Heater, Natural Gas, 140K BTU QR Code
Product Code: T-KJr2-OS-NG

Availability: In Stock

Weight:38.00 lb

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

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Takagi T-KJr2-OS-NG Tankless Water Heater is 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-OS-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-OS-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-OS-NG has a max GPM of 6.8GPM.


  • 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;

Technical Specifications:

  • NG Input Min. 19,500 Btu Max. 140,000 Btu;
  • Max Flow Rate 6.6 GPM;
  • Gas Connection 3/4" NPT;
  • Water Connection 3/4" NPT;
  • NG Gas Pressure Inlet Min. 5.0" W.C. Max. 10.5" W.C.;
  • Weight 29 lbs;
  • Dimensions 20.5" x 13.8" x 6.7";
  • Ignition Electronic Ignition;
  • Electrical Supply AC 120V (60 Hz) ;
  • Water Pressure Min. 15 psi Max. 150 psi ;
  • NG Manifold Pressure 2.5" W.C.;
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
Inlet Gas Pressure:5.0-10.5"W.C.
Installation Type:Outdoor 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
Water Connection:3/4"
Weight (lbs):33 lbs
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