How Do Tankless Water Heaters Work?

Wondering about how a tankless water heater works?

Well, it is very important to understand the functions of the traditional water heater before discussing the functionality exhibited by a tankless water heater.

Traditional heaters need almost 30-liters of water to store in their tank to provide hot water whereas tankless water heaters work on a totally different principle.

Tankless water heaters are said to be instant or on demand water heaters that provide you hot water anytime you want.

How Do Tankless Water Heaters Work

It does not store any water in it (as it doesn’t have a tank) to keep it hot. It works on the basic pipe principle that allows water to be hot just by turning on the cold water side of the tap which should be connected to the heater.

It provides continuous hot water if the faucet isn’t turned on repeatedly.

Take note that copper heat exchangers are the units used in tankless heaters to heat up the water.

How Do Tankless Water Heaters Work?

Tankless water heaters start to perform and give you hot water when the cold water tap is turned on. It activates automatically due to its ‘flow sensors’ which start the machine when you turn on the cold water tap, giving you hot water instantaneously.

Tankless water heaters work on both gas and electric energy courses.

Here’s a video showing how tankless water heaters work:

There are many advantages of buying tankless water heaters. You should consider three basic variables when buying tankless water heaters. They are:

  1. The quantity of hot water you need.
  2. The desired temperature of the water.
  3. The quantity of cold water entering in the heater.

Tankless water heaters are very popular globally due to their efficient performance and numerous other advantages.

People prefer to buy tankless water heaters over traditional heaters because they are smaller in sizes and better in performance. Such a heater can continuously provide you with hot water without you having to wait.

It can be easily stored at any place such toilets and cabinets and takes very little space to be installed. They also consume less energy and save money when it comes to your gas and electrical bills. It also doesn’t waste water because it doesn’t have a tank to store water in.

Furthermore, some tankless water heater models come with temperature controls. But before you go and buy such a tank for yourself, there some things you should keep in mind.

A tankless water heater might end up freezing or stop working if not used in a long time. If it is turned on and off continuously then it may give you a cold water sandwich. This means you’ll get cold water, followed by hot water, and then cold again.

And yes, due to the way they work (as mentioned above), tankless water heaters are expensive when compared to traditional heaters. Furthermore, having such a water heater repaired can cost a lot of money. It is advised that you call in professional help instead of trying to fix the problem yourself.

Precautions of using Tankless water heaters

  • Before starting to use tankless water heaters, you must read and understand the manual booklet that comes with it.
  • The heater should be turned off when not in use to avoid any leakage of gas or to prevent the risk of an electrical short circuit.
  • The device must be turned off when not in use to save energy.
  • There should be a vent (even if it is a small one) installed in the place where a tankless water heater will be placed to provide fresh air when the device is turned on.
  • If you are connecting your tankless water heater with a gas burner then you must be careful and make sure that the gas burner should be at least 18 inches above the floor to avoid any hazards.
  • Always keep a check on the gas burners attached to such water heaters to avoid any gas leakage. If you find any gas leakage then immediately leave the house or call a plumber.
  • Pipes should be linked properly to avoid leakage of water.
  • You should activate the water heaters from time to time to avoid any freezing of water in the pipes, depending on the kind of weather you live in.

Even though it is recommended that you don’t try to fix a tankless water heater yourself, understanding how it works will help you differentiate it from a traditional heater.

  • May 25, 2017
  • Blog

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