How the Tankless Water Heater Works

How the Tankless Water Heater Works

A tankless water heater is a heating unit meant for water that immediately heats water as it passes through it. It doesn’t save water inside it, except for what the remaining water in the heat exchange line. See for a good review of different types of tankless water heaters.

How does a tankless water heater functions?

When you request for hot water maybe by opening a hot water tap on the shower, sink, washing machine or tub, the inner component of the heater senses the flow and start the heating process. Each tankless water heating unit is designed with its own regulator board that will enable the user to control the heat level of the water as you like.

When water starts to flow, the regulator board checks the present level of the water coming in and the level you want and then check the difference. The based on this difference, the gas, and electric flow into the burner meeting so as to start the burner. The water is then heated to the level as you have chosen it on the control board. Then it goes through the heat exchange line, discharging the hot water. By the time you switch the water off, or you are not using it, the tankless water heating units goes off and is on hold until it’s needed again.

On reviews and different articles, you will see lots of arguments and debates going on as regards the tankless water heater. There has been a divided opinion whether the tankless water heater has the same capability or even better than the conventional container water heaters. Some people believe this assertion while some still stand on their ground that it is not superior to the container water heaters. If you are not really sure about whose sides to support in this debate, then maybe this review will clear your doubt and ensure that you fall to one side. In this review, we have created a list of the advantages and disadvantages of tankless heaters.


  1. They are energy efficient product – Tankless heaters can only operate whenever the user needs hot water. The same is not applicable to container water heaters that are in constant operation of heating the water to a specified temperature even when you are unavailable. The true fact is that this product has a high energy efficient capacity.
  2. Hot water can be gotten at any time – Any time the container water heater is not in operation or it runs out of the water, you have to wait for a period of time for the tank to contain hot water again. But that is not applicable to the tankless heater because it heats up the water that enters it directly and you don’t have to wait for the transmission of the hot water from the shower or tap, all that is required of you is to wait for few seconds.


  1. They are expensive – The tankless heaters are very costly than the container water heaters. The high price rate is part of the factors that scare people from purchasing a product. It comes at a cost of a thousand dollars and above which are too expensive for the regular working man.
  2. They waste a lot of water – You have to be patient for a few moment before the heat circulates around the water, and at this moment, the water will continue to run thereby wasting water.

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