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T-KJr2-OS Takagi Tankless Water Heater, Outdoor (Natural Gas)
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MANUALS (4)
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Product Highlights
Description
The Takagi brand has been discontinued by the manufacturer as of December 31, 2025. Suggested replacement units will be available on our website and replacement parts will continue to be available as supplies last. If you'd like any further assistance, please contact our customer service team.
Released in 2010, the T-KJr2-IN & T-KJr2-OS are the smallest water heaters in the Takagi tankless line. This small, but powerful unit can meet all the hot-water needs of a small American home or apartment with one or two bathrooms. Designed to virtually do anything a 40-gallon tank-type water heater can do and more, the compact, wall mounted T-K Jr. can provide domestic hot water to plumbing fixtures and appliances.
TK-REO2 Remote Control is included:
Specifications:
- Capacity: 1 to 2 Bathrooms
- Flow Rate: Maximum 6.6 GPM
- Gas Inputs: 19,500 to 140,000 BTU per hour
- Energy Factor Rating: 0.82
- Inlet Gas Pressure: Min: 5.0" W.C. / Max 10.5" W.C.
- Dimensions: 20.3" H x 13.8" W x 6.7" D
- No Venting Required
- Electric Ignition
Specs
| Application: | 1-2 Showers |
|---|---|
| Product Type: | Tankless Heater |
| Installation Type: | Outdoor Only |
| Energy Factor: | 0.82 |
| Fuel Type: | Natural Gas |
| Inlet Gas Pressure: | 5.0-10.5"W.C. |
| Manifold Pressure: | 2.0-2.5"W.C. |
| Height: | 20.3" |
| Energy Star Rated: | No |
| Width: | 13.8" |
| BTU (Min): | 19500 |
| BTU (Max): | 140000 |
| Depth (Inches): | 6.7" 7-3/4" |
| Height (Inches): | 20.25" |
| Max Flow (GPM): | 6.6 |
| Width (Inches): | 13-3/4" |
| Voltage: | 120v |
| Gas Input: | 19500-140000 BTU/h |
| Water Connection: | 3/4" |
| Gas Connection: | 3/4" |
| Temperature Range (F): | 99°F - 167°F |
| PSI Range: | 15-150 psi |
| Weight (lbs): | 33 lbs |
Questions?
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Product Reviews
Most Liked Positive Review
Great use of small places
Most Liked Negative Review
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worked great till it didn't
Not for commercial
Nice no-frills tankless outdoor propane water heater
I would buy this product again
Positive experience
Yesss
Terrific Unit!
I did by again and again !!
Best customer service EVER!!
Great heater, great value
Excellent service
Product Q&A
15 QuestionsQ: what about freeze up outside
Asked by john 14 years ago
Add your answer
Verified Reply- PexSupply StaffTakagi outdoor tankless water heaters do have freeze protection, but they are only designed for installation in mild, temperate climates. Keep in mind, also, that the freeze protection cannot function during a power outage.
We have had no freeze up problems as where we live in Ca it seldom gets below freezing. We cannot speak for North/ South Dakota, Minnesota or the Eastern Seaboard etc.
The unit will protect itself from freezing as long as it has power to the unit. The unit will not protect the pipes to and from the heater. Good freeze protection practices will be required for the plumbing outside ie locating the unit and plumbing in a outdoor cabinet or heat tape and insulate the exposed plumbing. Sent from my iPad
Our coldest weather in the eleven years I've lived here started two weeks after installation of our outdoor-mount Takagi tankless heater. It dropped to 10 degrees, and since the heater is meant to be good to 20, we left the water running, just enough to move, not enough to fire the heater. We live in a part of the world where it so rarely gets below 25 degrees F. that leaving the water on a trickle is the common way to keep the pipes from freezing. This last winter the coldest nighttime temperature has been 22F and the heater has been fine. We love it!
Takagi water heater has an anti-freeze devise, which warms up the heat exchanger. If this might be not enough it is better to use a blend of water and antifreeze (propylene glycol) solution, in proportions according to lowest expected temperature. But take into account that glycol-water blends are more viscous than pure water and perhaps a bigger pump would be needed.
Q: Will one tankless unit serve the kitchen and two bathrooms and the washing machine?
Asked by 14 years ago
Add your answer
This unit can meet all of the hot-water needs of a small home or apartment with one or two bathrooms. It is designed to do anything that a 40-gallon tank-type water heater can do.
Q: In comparison to gas, is this more economical?
Asked by 15 years ago
Add your answer
Verified Reply- PexSupply StaffThat depends on the respective rates for natural gas and liquid propane in your area.
The natural gas version of this product is more economical than the propane version.
Q: Water connection: would a 1/2 inch piping be enough?
Asked by 15 years ago
Add your answer
Verified Reply- PexSupply StaffWe would recommend 3/4".
No, 3/4 inch is required.
Q: Will this water heater work using natural gas?
Asked by 15 years ago
Add your answer
Verified Reply- PexSupply StaffThere is a natural gas models of this heater available here (part T-KJr2-OS-NG): http://www.pexsupply.com/Takagi-T-KJR2-OS-NG-T-KJr2-OS-Takagi-Tankless-Outdoor-Water-Heater-Natural-Gas
NO