Takagi T-KJr2-IN-NG Review – What Makes This Indoor Tankless Water Heater One To Consider

Takagi T-KJr2-IN-NG Natural Gas Indoor Tankless Water Heater

If you are trying to buy a small and light water heater for a one or two bathroom house, the Takagi T-KJr2-IN-NG can be a great investment. As the name implies, this unit runs on natural gas (For propane model, have a look at the Takagi T-KJr2-IN-LP). Being tankless means there is no tank to heat up all day. Lower energy consumption translates to utility bill reduction. It will give continuous hot water as long as there is gas and water passing through the unit. Let us take a look at this product in more detail.

This gas tankless water heater is rated at 6.6 GPM at a 35 degree rise. This unit would be good for 2 applications at a time. Standard showerheads have a flow rate of 2.5 gallons per minute while a standard dishwasher only uses 1.5 GPM and washing machines are typically rated at 4.0 GPM. Of course, your experience may vary since the flow rate output of a water heater will be determined by the temperature setting, along with the temperature of the incoming water. When raising the water temperature by 77 °F (from 58 °F to 135 °F), for instance, it will deliver 2.9 GPM of hot water

Takagi, the maker of tankless system also makes larger units that deliver more GPM. The T-K4-IN-N (190K BTU), for instance, puts out 8 GPM while the Takagi T-D2-IN-NG (199K BTU), which is suitable for commercial applications, is rated at 10 GPM. As with the T-KJr2-IN-NG, both are designed for indoor use. With all that being said, this 140K BTU model is more than adequate for a single or a couple. According to the reviews, you should be able to operate two showers at a time without issue. 0.5 GPM is required for activation and then it only requires 0.4 GPM for continuous fire after initial ignition.

Factory preset water temperature is 122 degrees. It might not function as quickly as a conventional tank based system, but still does the job. Using the jumpers inside, you can set the temperature to as high as 167 degrees F. A remote panel is included, allowing you to easily set the desired output temperature and monitor things like water out temperature and flow rate. The thermostat requires a 120V AC outlet to spark the ignition. AC power is also required for the exhaust fan. There is no standing pilot light.

One selling point of this fully modulating, gas fired water heater is the size. It measures approximately 20-1/4″ H x 13-3/4″ W x 7-3/4″ D. Being the smallest unit in the Takagi line-up, it is just 35 pounds in weight. When it comes to installation, it requires 3/4″ gas and 3/4″ water line connections. The direct vent unit needs to be vented to the outside using 4″ diameter stainless steel venting. No galvanized or aluminum vent pipes. If you are switching from a conventional tank based system, you will probably have to upgrade your vent pipe.

The maximum allowable installed altitude is 6000 ft (Default is 0-2000 ft). There are different settings for different altitudes. Adjusting the performance for altitude is accomplished by switching the DIP switches inside the device. The Takagi TKJr2-IN-NG also has a number of safety features that include freeze protection, overheat cutoff fuse, and flame sensor. Optional accessories are available to purchase. For you who live in colder regions, do not forget to install a back flow preventer in the vent pipe. If your water hardness is greater than 7, be sure to install a scale inhibitor for maximum life out of the heat exchanger.

The Takagi T-KJr2-IN-NG has a good amount of reviews on Amazon. Most users have awarded the tankless heater with either 4 or 5 stars, which means they absolutely adore it. However, not everything about this product is positive. Like any heater, it has its strengths and weaknesses.

People have commented that the water heater can be installed relatively quickly. The instructions are straight forward. Just be aware that the initial start up costs could be very pricey especially if you need to provide all of the plumbing, mounting and exhaust venting hardware.

Despite having a few downsides, the indoor heater possesses a number of qualities that have impressed its reviewers. People have been satisified with its heating capacity. The T-KJr2 model is the smallest unit in the Takagi line-up. That said, positive comments have been made for its ability to keep up with two faucets running at the same time. It puts out plenty of hot water at a steady temperature.

In terms of energy factor, this unit is rated at .82. This means 82 percent of the energy this heater uses is converted into hot water. It is not especially energy efficient. The Takagi T-KJr2 is a non-condensing unit, meaning it will just push the hot exhaust gases through its vent to the outside. In other words, the exhaust gas is not utilized to help with heating. However, many people have been happy with its performance. Compared to conventional tank-type water heaters, it costs much less to operate.

In terms of durability, customer reviews indicate that this unit is rock solid and easy to maintain. The company seems to stand behind their products. The warranty is 10 years on the heat exchanger and 5 years on parts. Just keep in mind that the warranty is void if not installed by a certified installer.

All in all the Takagi T-KJr2-IN-NG is a well manufactured and reliable product. Your experience may vary. What works for others might not work for you. However, if what you want is a compact, on demand water heater for a small family then based on reviews and reputation this product is the way to go.