Takagi T-KJr2-OS-LP 6.6 GPM Liquid Propane Gas Outdoor Tankless Water Heater

- Item #: BCI1908124

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This product has additional required/recommended options. To configure, add to your cart.

  • Exhaust Backflow Recommended
  • Wall Thimble Recommended
  • Covers Recommended
  • Recess Box Recommended
  • Remote control Recommended

Liquid Propane OutdoorTankless Water Heater

The T-KJr2-OS model is the smallest unit in the Takagi line-up. The T-KJr2-OS is perfect for light residential (i.e. small apartment units) and radiant heating applications. This small but powerful unit, with gas inputs up to 140,000 BTU per hour, can meet all the hot water needs of a small American Home or apartment with one or two bathrooms. This unit will flow at a maximum of 6.6 gallons per minute. The Takagi T-KJr2-OS can virtually do anything a 40 gallon tank-type water heater can do and more!


  • Capacity 1-2 Showers (Depending on climate)
  • Gas Fired Tankless Water Heater
  • Outdoor Installation Only
  • Safety Features: Air-Fuel Ratio Sensor (AFR), Exhaust and Water Temperature Safety Control, and Overheat Cutoff Fuse
  • Internal Freeze Protection System
  • Manual reset switch


  • Min 19,500 BTU/h
  • Max 140,000 BTU/h
  • Energy Factor - 0.82
  • Dimensions - H 20.3" x W 13.8" x D 8.5"
  • Weight - 33 lbs
  • Clearance- Top: 12", Bottom: 12", Front: 24", Back: 1", Sides: 2 "


  • No venting required
  • Electric Ignition


  • TK-RE02 - Temperature Remote Control
  • TK-PCJr2 - Pipe Cover
  • 9007674005 - Heater Recess Box


Why choose Takagi? Takagi produce some of the most highly efficient tankless water heaters in the industry. With a commitment to innovation and quality, they are constantly creating new technology to keep up with their customers’ ever-changing hot water needs. Takagi sets the bar with the most stringent of durability testing standards for all of our models. For 15 years, Takagi has provided the most eco-friendly, energy-efficient water heating solutions in North America.

Additional Takagi Links

Our SKU: Takagi T-KJr2-OS-LP

This product is listed under the following manufacturer number(s):

  • Takagi TKJr2OSLP

*Denotes a finish or option that has been discontinued

Takagi TKJr2OSLP Product Specifications

Specification Sheet
Approved for Commercial Use Yes
Configuration Tankless Water Heater
Default Temperature 122
Depth 6.7
Direct Vent No
Fuel Type Liquid Propane, Natural Gas
Function Non-Condensing
Gas Connection 3/4"
Height 20.3
Ignition Type Electronic
Indoor Installation No
Liquid Propane Pressure (Max) 14.0 WC
Liquid Propane Pressure (Min) 8.0 WC
Low Lead Compliant Yes
Maximum Gas Input 140000
Minimum Gas Input 19500
Outdoor Installation Yes
Power Supply AC 120V
Product Weight 33
Temperature (Max) 167
Temperature (Min) 99
Water Pressure (Max) 150
Water Pressure (Min) 15
Width 13.8

Installation Resource Center

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Takagi T-KJr2-OS-LP Reviews

Rated 5 out of 5 by from Great Product Works just as expected. It was easy to mount and since it is mounted outside no venting was required. When the faucet is turned on the water is hot within a few seconds. The only drawback is that in order to validate the warranty it must be installed by a professional plumber.
Date published: 2014-02-05
  • Is there an altitude limit with this water heater?


    The Takagi T-KJr2-OS-LP is not recommended to be used at over 6600 feet in elevation.

  • Is the unit UL and building code approved?


    The Takagi T-KJr2-OS-LP is approved for commercial use and meets code requirements.

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