Takagi T-K4-IN-NG Indoor Tankless Water Heater review


Tankless water heaters offer a safe, reliable and energy efficient solution for obtaining hot water in homes. Takagi – a renowned Chinese manufacturer of plumbing equipment – has introduced a range of products in this category. The Takagi T-K4-IN-NG Indoor Tankless Water Heater is one of the best instant water heaters in the market. It has been serving households since its introduction by the company in 2010.The appliance has been designed for indoor installation. It is capable of delivering an uninterrupted hot water supply to bathrooms as well as the kitchen.


More specifications and details of the product are discussed in the following review.

Energy Efficient

Takagi T-K4-IN-NG requires a supply of natural gas as the driving power for heating up water. However, it burns gas only when the water heater is in use. This prevents a significant amount of wastage. In this way, the product’s contribution towards environmental pollution owing to the release of the by-products of burnt gas is also minimum. Featuring an energy factor of 0.83, the Takagi T-K4-IN-NG Indoor Tankless Water Heater stands as an exceedingly energy efficient as well as environment friendly product. In addition, users are able to make savings of up to forty-five percent on the monthly gas charges.

Ultra-Compact Design

This tankless water heater can be fitted on any wall in the bathroom or kitchen owing to its ultra-compact body. It measures only 13.8 inches in width with a height of 20.5 inches and 8.5 inches of width. Additionally, it is quite a light weight appliance measuring only 43 pounds in weight. The installation needs a gas supply and water line as the mandatory requirements. The handy design allows the tankless water heater to be mounted on any wall wherever it is convenient according to the availability of the gas pipeline and water supply.


Takagi T-K4-IN-NG Indoor Tankless Water Heater is capable of producing an unlimited supply of hot water. So whether you are the first one in the shower or the last one, you do not have to worry about running out of hot water. This is because the tankless technology eliminates the need to store pre-heated water. Instead, it heats up the water as it is being use. The heating is instant and the supply is smooth. The efficient appliance is able to provide hot water to two to three bathrooms or two bathrooms and one kitchen at the same time.

The Bottom Line

In a nutshell, Takagi’s T-K4-IN-NG Indoor Tankless Water Heater system is the perfect solution for average households. Summarized below are the benefits offered by the product to let you know why you should opt for it among all others.

  • It is a one-time investment to cater to the hot water requirements of homes. Being energy efficient, it cuts downs fuel bills and leads to long term benefits.
  • The product offers suitable safety measures in the form of water temperature control as well as an exhaust.
  • The energy factor rating for this water heater is 0.82. This means it is not only efficient but also environment friendly. It is, therefore, the right product for those who care about their surroundings and the global environment.
  • The appliance is accompanied by a long warranty period – twelve years for the heat exchanger and five years for the parts. However, the only condition for the warranty to be valid is that the water heater must be installed by a licensed professional plumber.

Avail all these advantages and more by purchasing the T-K4-IN-NG Indoor Tankless Water Heater by Takagi.

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