Contact Us
Register | Log In
Facebook pageLinkedIn pageTwitter page
Cart Summary
Your Cart is Empty
View Cart
 Visa  Mastercard  Discover  American Express
Electric Floor Heat
Tools & Accessories
Heating System Controls
Water Heaters & Boilers
SlantFin Boilers
Weil-McLain Boilers
Triangle Tube Boilers
Argo Electric Boilers
SubRay - Discontinued
Estimate Request

Free Radiant Floor Heating Estimates
Free Shipping

Free Ground Shipping on Orders Over $200
Find us on Facebook
RPA Trained - Keeping your project done right
Radiant Professionals Alliance
  T-KJr2 140,000 Btu Outdoor Tankless Water Heater, Propane
T-KJr2 140,000 Btu Outdoor Tankless Water Heater, Propane
Click to enlarge
Takagi T-KJr2-OS-LP 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. 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-LP 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-LP 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-LP has a max GPM of 6.8GPM.

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

To achieve any temperatures other than those presets, use the Takagi TK-RE02 remote temperature controller.

This unit comes factory converted for outdoor installation. There is no venting kit needed.


  • Fully modulating, gas fired tankless water heater
  • Outdoor Installation (No vent kit needed)

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: Propane
  • 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 (Propane): 0.83;
  • 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
  • Propane Inlet Pressure: 8.0" W.C. min.; 14" W.C. max
  • Manifold Presure (Propane): 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
  • 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

 For more information, view:

Part Number: T-KJr2-OS-LP

Price: $635.39

Tell a Friend

TK-RE02 Temperature Remote Controller
TK-RE02 Temperature Remote Controller
Price: $106.77