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Takagi T-KJR2-OSNG Outdoor Tankless Water Heater Natural Gas


The T-KJr2 (Outdoor Tankless Water Heater Natural Gasmodel is the smallest unit in the Takagi line-up. The T-KJr2 is perfect for light residential (i.e. small apartment units) and radiant heating applications.

Cost-efficient and environmentally friendly, the T-KJr2-IN can be converted into a direct-vent unit by using the optional TV10 conversion kit for installation in a garage, a utility closet or any confined space in which makeup air may be limited.


  • Fully modulating, gas fired, tankless water heater
  • Indoor and Direc Vent 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
  • Power Cord included
  • Temperature Remote Controller included (TM-RE30)

Venting & Combustion

  • Horizontal or Vertical Installation
  • Power Vent
  • Electric Ignition
  • Flue 4" O.D
    • Category III/IV Stainless Steel
  • Intake 3" O.D
    • ABS, PVC Galvanized Steel, Corrugated Stainless steel or Category III/IV Stainless Steel
  • 50' Max Length, 5 elbows max(90° elbow = 5' equivalent length)


  • TK-BF01
    Backflow preventor
  • TK-KPCT43
    3x4 DV Concentric Termination
  • TK-TV10
    Direct Vent Conversion Kit
  • TK-KPWL4 and TK-KPWH4
    Wall Thimble Louver/Hood Termination
  • TK-PClr2
    Pipe Cover
Natural Gas Input  Min. 19,500 Btu   Max. 140,000 Btu  
LPG Input  Min. 19,500 Btu    Max. 140,000 Btu 
Gas Connection  3/4" NPT     
Water Connection  3/4" NPT     
Natural Gas Pressure Inlet   Min. 5.0" W.C.    Max. 10.5" W.C. 
LP Gas Pressure Inlet   Min. 8.0" W.C.    Max. 14.0" W.C.  
Weight  33 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  
Natural Manifold Pressure  2.0-2.5" W.C.    
LP Manifold Pressure  2.5-3.1" W.C.    



Download T-KJr2-IN/OS Manual
Download T-KJr2-IN Specification Sheet
Download T-KJr2-OS Specification Sheet

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