Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

Takagi T-KJr2-IN-LP Tankless Water Heater

Note: This product was discontinued by the manufacturer. We recommend you checkout our updated reviews of the best tankless water heaters on the market today.

Established in 1952, the Takagi brand has been providing hot water heating solutions for more than 60 years. Regardless of where hot water is needed, Takagi aims to provide the perfect solution. It is this dedication that has earned the brand a loyal following that spans generations. One interesting fact about this company is that they were the first business to focus solely on the design and production of tankless water heaters in North America. The newest addition to their storied product line is the Takagi T-KJr2-IN-LP Tankless Water Heater.

Initially released in 2010, the Takagi T-KJr-IN-LP is the smallest, most compact water heater offered by Takagi. However, its small size does not mean it lacks power. It is more than capable of meeting the needs of a small apartment or home with one or two bathrooms. This model offers the same capabilities and features of a traditional hot water heater with a 40-gallon tank. It has a maximum flow rate of 6.6 gallons per minute. This wall mounted model will supply hot water to appliances and plumbing fixtures. Additionally, it can also support radiant floor heating applications, as well as hydronic baseboards.

Key Features

  • The T-KJr2-IN-LP has a max flow rate of 6.6 GPM, making it ideal for powering multiple outlets at once.
  • Weighing only 38 pounds, the compact and space saving design of this unit allows it to be installed almost anywhere in your home.
  • Category 3, 4″ stainless steel venting is required to install this unit.
  • Included inlet and outlet thermistors provide continual temperature and energy output monitoring.


  • For the output it provides, the Takagi T-KJr2-IN-LP has an affordable price tag.
  • It offers convenient and adjustable settings for both water temperature and water flow.
  • The inclusion of thermistors minimizes the occurrence of water pressure fluctuations.


  • This model is not suitable for larger homes.
  • The manufacturer’s warranty offered by Takagi is not as good as some of their competitors.

    Product Review

    Small, discreet, and efficient, the Takagi T-KJr2-IN-LP has a lot going for it. It is important for prospective buyers to note that this unit is powered by propane gas, and it cannot be converted to anything else. It can reach temperatures of 150 degrees Fahrenheit and higher. In moderate climates, the T-KJr2-IN-LP can heat an average of 6.6 gallons per minute. In colder climates, this output will drop to an average of 3 to 6 gpm. There are switches on the water heater that allow the user to adjust the temperature of the hot water, but the model also comes with a convenient remote ““ a feature that users have particularly enjoyed.

    In terms of technical specs, the Takagi T-KJr2-IN-LP has a max BTU rating of 140,000, and it is equipped with outlet and inlet thermistors for continuous temperature monitoring. This model is Energy Star certified, and it has an Energy Factor of 0.81-0.83. It is capable of offering the same level of performance as a traditional water heater with a 40-gallon tank. Another bonus point in this model’s favor is the fact that it can also support radiant floor heating applications ““ making it a great, all-around water heater.


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    Although it does not have to do with the unit’s ability to perform, it is worth noting that the manufacturer’s warranty is not as good as some other brands. Takagi offers a 10-year warranty on the heat exchanger and a 5-year warranty on its components. The industry average warranty on a heat exchanger is 12 to 15 years, and Takagi does not offer a warranty on parts and labor. However, as with most other manufacturers, the tankless heater must be installed by a licensed professional, or else Takagi will not honor the warranties it offers.

    Thank You For Reading

    With highly favorable reviews and a decent warranty, the Takagi T-KJr2-IN-LP Tankless Water Heater would make a solid investment for any small home, apartment, condo, or even an office. It offers a cost-effective solution for reducing your home’s monthly energy consumption (and lowering those pesky electric bills!). If you are looking for a long term solution to your heating issues, this Takagi model has it.