The Best Tankless Gas Water Heater

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

If you want access to hot water heater at home whenever you want, the best choice is to get a water heater. This will eliminate the need to keep boiling water in a kettle or some other device. All you need is a water heater and you will have instant access to hot water. To take it further, you should go for a tankless water heater because of several benefits that you can’t find from a water heater with a tank. And if you want a long term investment, we suggest you get a tankless gas water heater. Compared to its electric counterpart, gas-powered units have better cold-weather performance and average lower fuel costs over time. Plus, they’re also more reliable if we are talking long term wise. So if you are getting a tankless gas water heater, it is highly recommended that you get the Takagi T-KJr2-IN-NG Indoor Tankless Water Heater. This is the best tankless gas water heater on the market today. You’ll find out why if you keep reading this article.

Main Characteristics

The Takagi T-KJr2-IN-NG is a very reasonably priced and popular water heater. It is considered the best choice in the gas category for small to medium-size households with fairly low demand for hot water. It will be able to supply you with with 2-3 fixtures at once in a warm climate. That is a very doable amount and is normally what an average household in most of the countries need. It will also provide plenty of hot water for apartments and smaller homes in cold climates.
The tankless gas water heater is capable of performing functions that a 40-gallon tank type water heater can perform. Although this is considered the smallest in all of Takagi's line of tankless heaters, it has the best scores in the technology front. Plus, it has the capability to provide a regular supply of hot water for a family. When you use this unit, you will be guaranteed consistent water temperature through its thermistors. It als features an air-fuel ratio (AFR) sensor that will check the efficiency, thus reducing harmful emissions. It features water temperature safety controls and will turn itself off in the event of overheating. It also has additional safety features that include troubleshooting diagnostic codes, freeze protection and surge protection.

Pros and Cons


-> Very durable. Can provide a family with hot water for up to ten years

-> Easy to adjust its performance

-> Inexpensive

-> Excellent warranty terms

-> Provides excellent value for your money


-> Cost of Installation is high. You have to hire a certified professional to install the unit in order validate the warranty

-> Direct vent parts are not easy to find

-> Can only supply limited hot water that is only enough for houses with two bathrooms


This tankless water heater is designed to use natural gas with an input between 19500-140,000 BTU/h. It has a flow rate of 6.6 gallons of water per minute (GPM) at 350F. It is designed so that the temperature can rise to 70 degrees Fahrenheit at 3.3 GPM. This unit is also designed to support hydronic baseboard or radiant floor heating applications. This unit requires venting to the outdoors. The venting can be horizontal or vertical. It has approximately 0.5 GPM activation rate and will require a 110-volt electricity supply.

Special Features

What makes this tankless gas water heater unique is its ability to control the flow rate. The maximum flow rate for this unit is 6.6 gallon of water per minute, but it can be reduced depending on your specific needs. You can also adjust the temperature of the hot water from anywhere between 99 degrees Fahrenheit to 167 degrees Fahrenheit, depending on your preference. You can do this using the remote control that is provided, which makes it much more convenient to use.


Takagi provides a very long warranty of 15 years on the heat exchanger and 5 years on other parts, in residential applications. The warranty starts from the date of purchase and as mentioned above, the unit must be installed professionally in order for the warranty to be validated.


The Takagi T-KJr2-IN-NG is the best tankless gas water heater because it can offer you the best value for your money. Even though it is small in size, it is a very powerful system for supplying constant hot water on demand in small homes. It is proven and tested, and is very reliable. That’s why it has received a lot of positive reviews from customers. It is definitely one of the best investments in terms of tankless gas water heaters.

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