5 Best Takagi Tankless Water Heater Reviews with Buying Guide in 2020

Best Takagi Tankless Water Heater Reviews

Takagi Tankless Water Heater ReviewTakagi Industrial Company is a reputable Japanese manufacturer that has been manufacturing and designing tankless water heaters since 1952. Since then Takagi Company has constantly introduced amazing models and features; including the automated gas control valve systems, direct vent convertible water heater, computer modulating safety system and gas valve. Unique safety devices that use air-fuel ratio rod, greater 95 percent thermal efficiency ratings (T-H1 model).

Here especially notable that the T-M1 model is the very first multi-gas water heating system for industrial applications. So if you are an industry owner, then probably Takagi Tankless Water Heater is the best solution you desire.

Today, Takagi tankless water heaters manufacturer has several offices in the US, Canada, and Japan. Furthermore, to purchase one of their models you will have to contact their exclusive dealers or choose to buy them online. But I would suggest that you should buy from online as its the quickest way to purchase any product.

Why Choose Takagi Tankless Water Heater?

whyTakagi water heaters would be an ideal solution for both small homeowners to large commercial areas, who are looking for greater versatility from the heating potable water heater to the application in the recirculation systems. From their smallest model T-KJr heaters to the largest model T-M50 you’ll find Takagi models that have greater energy efficiency. These use less energy, are environment-friendly. These meet or even exceed Low NOx standards as well as those that preserve natural resources by the use of 95 percent recyclable materials.

Just like other well-known tankless heaters, Takagi water heaters provide an endless and on-demand supply of hot water. These water heaters usually supply water with their sophisticated features that allow for a steady flow of the hot water with little fluctuation.

All Takagi units use a wide range of features to protect the water heating system like overheat sensor, flame sensor, hi-limit switch, air control, thermistors, and various ceramic heaters in order to prevent the appliance from freezing when surrounding temperatures drop too low.

Takagi uses small computers for the proper operation of the unit. The computer maximizes efficiency and also reduces the emission of carbon monoxide gas. Additionally, the computer adjusts and monitors the fuel/air ratio and thus the quality of gas combustion.

Takagi company is one of the manufacturers of tankless water heaters that offer the Direct Vent Convertible heaters. Furthermore, Takagi water heaters that are used in the residential applications have a warranty of 15 years on the heat exchanger and 5 years on the other parts. The warranty on commercial usage is 10 years.

To top it off, Takagi tankless heaters are remarkably compact. As such, you can easily install the unit in spaces where a traditional tank-type heater wouldn’t be able to fit. In this Takagi tankless water heater review, we shall look at the features and specifications of their top 5 models.

Top 5 Best Takagi Tankless Water Heater Reviews

Takagi Tankless Water Heater ReviewsTakagi tankless water heater Company usually offers a very decent selection of the gas-fired tankless heaters for commercial and residential applications; from the low demand applications such as condos or small offices to the larger homes having multiple baths and also for use in industries.

Here are the Takagi tankless water heater reviews for their top 5 model:

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

Takagi T-KJR2-IN-NG ReviewReleased in 2010, the Takagi T-KJr2-IN-NG water heaters are the smallest units in the Takagi line of tankless water heaters. This small yet powerful unit is able to meet all hot-water needs of a small apartment or home with 1 or 2 bathrooms.

The Takagi T-KJr2-IN-NG is environmentally friendly and cost-efficient. It can also be converted into the direct-vent unit just by making use of the optional TV10 conversion kit for installation in a utility closet, garage or any other confined space where makeup air might be limited.

Key Features

  • Inlet, outlet thermistors
  • 6.6 GPM
  • Energy factor of 0.81-0.83
  • Longer warranty


  • their warranty is only applicable if the heater is installed by a licensed technician. This is not so much of a problem since it is always better to install heaters by a technician.

The model has been designed to do nearly anything that 40-gallon tank water heaters do. The compact and wall-mounted Takagi T-KJr2-IN-NG can support the radiant floor or hydronic baseboard heating applications. It also provides domestic hot water supply to plumbing appliances and fixtures.

#2 Takagi T-KJr2-IN-LP Indoor Propane Tankless Water Heater Review

Takagi T-KJr2-IN-LP Indoor Propane Tankless Water Heater ReviewThe Takagi T-KJR2-IN-LP tankless water heater is the most compact heater in the Takagi tankless water heater line. It is designed to offer an endless supply of hot water alongside radiant heating for the smaller homes. The T-KJR2-IN-LP uses similar innovative technologies as the original Takagi heater – only on a smaller scale.

Key Features

  • Direct vent
  • Energy efficiency
  • 6.6 GPM
  • Compact design


  • like Takagi T-KJr2-IN-NG, this water heater also gives warranty provided that you install the heater by a licensed technician.

This is an amazing water heater. You will not have to worry about the wastage of space while installing this great water heater.

#3 Takagi T-H3-DV-N High-Efficiency Condensing Natural Gas Indoor Tankless Water Heater Review

Takagi T-H3-DV-N High Efficiency Condensing Natural GasTankless Water Heater ReviewThe Takagi T-H3-DV-N is a 59 pound highly efficient Natural Gas heater with the ability to produce 10 gallons/minute. The Takagi T-H3 has a dimension of 11.2 by 17.8 by 24.9 inches. This unit also occupies little space in homes. It has been designed for the indoor installation and has a higher energy star rating.

Key Features

  • 10 GPM
  • Energy efficiency
  • Ultra-Low NOx Emissions


  • this water heater is suitable only for indoor use. Other than that, it is an amazing heater.

This is one of the most economical and environment-friendly water heaters in the market. You will not have to worry about the durability of it one you install the heater.

#4 Takagi T-K4-OS-NG Outdoor Natural GasTankless Water Heater Review

Takagi T-K4-OS-NG Outdoor Natural Gas Tankless Water Heater ReviewThe Takagi tankless T-K4 is a compact and wall-mounted whole-house heater that is designed to provide an endless and on-demand supply of the hot water in large amounts. The T-K4/U water heaters are used for space heating in commercial and residential applications.

Key Features

  • No venting required
  • 8 GPM
  • Built-in freeze protection
  • Constant temperature monitoring


  • The warranty that comes with this heater is relatively lower than the other water heaters. But you do not have to worry about it, because this water heater will serve you for a lifetime.

It is very reliable and efficient. The Takagi Tankless T-K4 is the perfect tankless heater for smaller households and families that only use less than two hot water appliances at a time.

#5 Takagi T-KJr2-OS-NG Outdoor Natural Gas Tankless Water Heater Review

Takagi T-K4-OS-NG Outdoor Natural Gas Tankless Water Heater ReviewThe Takagi T-KJr2-OS-NG Outdoor Water Heater is one of the smallest Takagi units. The T-KJr2 is ideal for light residential (small apartment units) and the radiant heating applications. The Takagi T-KJr2-OS-NG can also be converted to direct-vent units using the optional TV10 conversions kit for installation in the garages and other confined spaces.

Key Features

  • 0.82 energy factor
  • Direct-vent heater
  • Compact design
  • 6.6 GPM


  • This heater can only be installed outside the house. But that should not be a problem since it is very energy efficient.

This is an environmentally friendly and cost-efficient water heater. This heater will also meet all your hot water needs.


After a long day at work, we all crave for a hot water shower that relaxes our body and washes away most of the tiredness. However, to be sure that your tankless water heater is up and running when you come back from work, pick the brand wisely and don’t buy without considering the reputation of an electric heater’s brand. That’s the reason we chose the most-trusted Japanese brand Takagi this time and reviewed its top-notch heaters to give you a better understanding. For close to a century, Takagi has enjoyed a good reputation as a world-class innovator as well as supplier in the tankless water heater’s industry.

To sum it up, Takagi offers a wide array of water heaters – they come in different shapes and sizes, they are easy to handle and install and they are designed to protect the surrounding environment by lowering the energy and water consumption. These heaters are cost-effective solutions for improving the comfort of your home.

Best Takagi Tankless Water Heater Comparison Chart


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37 Pounds

6.6 GPM

Energy factor 0.81-0.83

140,000 BTU/H

4-Inch category III vent

10 year Heat Exchanger



38 Pounds

Max 6.6 GPM

0.80 Energy Efficiency

140,000 BTU/H

Low Nox Emissions

Compact Design



59 pounds

10 GPM

High Energy Efficiency

199,000 BTU

Ultra-Low NOx Emissions

Computerized safety



38 pounds


Built-in freeze protection

190,000 BTU

No venting required

5-year limited heat exchanger warranty



38 pounds

Max. 6.6 GPM

0.82 Energy Factor

19,500 - 140,000 BTU/H

Compact design

Direct-vent heater


Please contact us if you got any queries or any confusion about any kind of heaters for your home.