Takagi TH3JDVLP Tankless Water Heater, 6.6-Gallon per Minute


Released in 2010, the T-KJr2-IN & T-KJr2-OS are the smallest water heaters in the Takagi tankless line. This small, but the power 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 support hydronic baseboard or radiant floor heating applications, as well as provide domestic hot water to plumbing fixtures and appliances.

Cost-efficient and environmentally friendly, the T-KJr2-IN can be converted into a direct-vent unit by using the optional TV10 conversion kit for installation in a garage, a utility closet, or any confined space in which makeup air may be limited.


In Stock.
Inlet, outlet thermistors for constant temperature monitoring Perfect for light residential and radiant heating applications Manufactured in Japan
Product description

With gas inputs of 160,000 BTU, the T-H3J can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates.

From the Manufacturer

With gas inputs of 160,000 BTU, the T-H3J can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates.


Product information


Technical Details

Our Customer Reviews:
 But overall super pleased. 
By Tom on March 26, 2019
Verified Purchase
We purchased this hot water heater in summer 2018 for our off-grid tiny house. The first one came to us very damaged, thanks to FedEx. But the sale was amazing to us and replaced it immediately and took care of sending the damaged one back to them. Very good customer service from the seller!

Pros: you get hot water very fast!!! I was very surprised! I have 120 degrees F hot water in about 30-40 seconds in the shower or the kitchen sink. Very quiet unit and has small lights to know when working or not. So thankful the lights are not super bright and they use very little electricity. The unit seems to be very efficient, we do not go thru a lot of propane.

Cons: This unit is kinda big. Yes, we read the size according to the manufacturer and we planned accordingly but it is still pretty big. There is also a line that you have to connect to your greywater system to get rid of the toxic/acidic exhaust once the water has finished heating up. It's how the system keeps itself clean. So there are just five lines of stuff coming and going from the unit. With living in a tiny house, we were just not able to put it in a closet to hide all of it.
If we build another house, big or small, we will purchase another one of these hot water heaters. They truly work very well!

 It works great!
on January 25, 2019
Verified Purchase
We just completed the installation late this afternoon. Converted from a 21-year-old propane tank heater and it was a pleasure to help handcart it out the door. The conversion was a bit of a challenge but with our contractor's help, we got it done. We used the DiversiTech CVENT-3 Concentric Vent Termination Kit and you can see in the picture how we positioned it. We also used the Watts 3/4-LFTWH-FT-HCN-RV Tankless Water Heater Service Valve Kit, with Pressure Relief Valve and the Aqua-Pure AP430SS Hot Water System Protector. I highly recommend this water heater and the additional parts I chose.

It's first assignment was a load in the dishwasher. I jumped in the shower about halfway through the cycle and had no water supply issues. I left it set at the default 120 degrees and I had to mix in a little cold water. I am nearly 71 with a very bad back and lots of arthritis. I find a very hot bath before bed helps my so just before bed I was able to take the best bath ever! Time to hit the sack and get a good night's sleep.

 Works perfectly.
on March 3, 2018
Verified Purchase
Ticks away like a Dream, I use this to heat my home (in-floor heating) set to 140 and run approx 2GPM. It was 6 inches shorter than the unit it was replacing but very close to plug and play. Being in Ontario and having a short exhaust stack (20 feet) No need to tweak the dip switches. has been up and running for almost 2 months and no issues. throws heat almost instantly from the time of ignition and a short pre-light cycle ( about 10 seconds from demand too HOT HOT water)

 Find your own installer
on March 7, 2018
Verified Purchase
So far love this water heater, but had a very bad experience with the installer through Amazon. The person arrived on time as scheduled but was not a qualified professional. I called his supervisor before starting a job who said since my current heater wasn't tankless that I should by for a new installation instead of replacement. I told him I wanted to cancel, then he offered a 'deal' if I dealt directly with him, and not through Amazon having no hot water for a week, I took the offer. Installer left exposed wiring out of the electric outlet he tapped into, definitely not up to code. Used duct tape to 'seal' gas exhaust pipe to outdoors. He gave me his personal card at the end of the job for his own side business as a professional painter. Next time I will hire my own professional!