Takagi T-KJr2-OS-NG 6.6 GPM Natural Gas Outdoor Tankless Water Heater

- Item #: BCI1835846

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

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

6.6 GPM Natural Gas Outdoor Tankless Water Heater

The T-KJr2-IN-NG model is the smallest unit in the Takagi line-up. The T-KJr2-IN-NG 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-IN-NG can virtually do anything a 40 gallon tank-type water heater can do and more! The wall mounted T-KJr2-OS can support hydronic baseboard or radiant floor heating applications, as well as provide domestic hot water to plumbing fixtures and appliances.


  • 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-NG

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

  • Takagi TKJr2OSNG

*Denotes a finish or option that has been discontinued

Installation Resource Center

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Takagi T-KJr2-OS-NG Reviews

Rated 5 out of 5 by from Awesome Deal! Everybody knows that tankless water heaters are the most modern and energy-efficient option currently available. It is difficult, however, to purchase one suitable for an entire home that costs less than a thousand dollars. Getting my hands on a quality Japanese-made Takagi unit with the full manufacturer's warranty for nearly half that price is a steal! I've only had it installed for about month, but so far, it's working perfectly. I couldn't be more satisfied.
Date published: 2013-10-11
Rated 5 out of 5 by from As expected I have Takagi TK3 old model indoor type. I expected same result for new one which I am very satisfied.
Date published: 2012-12-02
Rated 5 out of 5 by from great product hot water heater works great. good price. works great for our smaller home, no big tank to take up space.
Date published: 2014-07-18
Rated 5 out of 5 by from exelent product very good product. Idid hook it up and turn on. Working great
Date published: 2014-02-11

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