Tankless water heaters, which are also known by the name instantaneous or demand-type water heaters, give hot water if it is needed. They are a good option to save money because they don’t have the standby loss in the energy that is associated with the storage water heater type.

This article will help you to know all there’s about this appliance, ranging from how they work, benefits, and the criteria to consider when buying the right model.

How does a tankless water heater work?

The working of this appliance might seem the opposite of the tank-style water heater because the tankless type heats the water directly with no need for a storage tank. When the tap for hot water is opened, cold water enters the unit through the pipe. Now the unit uses either an electric element or a gas burner to heat the water. Due to this, the delivery of a continuous supply of hot water is possible. The only limitation for the output of hot water is the flow rate.

Benefits of a Tankless Water Heater

Instant Hot Water

One of the noteworthy benefits of this appliance is that any source of water can be converted into hot water on demand. Unlike the conventional tank-style water heater, which is limited in the hot water supply according to the amount of storage in the tank, that is not the issue here. This tankless water heater will easily meet an endless supply of hot water to meet your lifestyle demands.

Lower Energy Bills

Since the units are designed to be highly efficient, heating only when it is required, they help to save about 40% of the energy costs.


It can last for more than 20 years, which is twice the longevity of tank-style heaters.

  1. Space Savings

Traditional water heaters require a lot of floor space, whereas the tankless water heaters come in a size of a carry-on suitcase that enables it to be installed anywhere inside or outside the house.

Clean Water

The conventional type has rust and scales built up inside the tank in which hot water is stored. Since no tank is present in a tankless water heater, you will always experience fresh and clean water because it is not stored.

Criteria to select a tankless water heater

Before you buy a tankless water heater, make sure to consider the below factors to make a good decision.

  • Size
  • Costs
  • Energy efficiency
  • Type of fuel and its availability

Installation and maintenance

To optimize the energy efficiency of tankless water heaters, proper installation and maintenance are mandatory.

Many different factors are dependent on proper installation. Some of the factors are climate, fuel type, and safety, especially if the combustion is gas-fired type.

Care must also be taken to do regular maintenance because it can significantly increase the life of the appliance and also decrease the loss of efficiency. Each model of tankless water heater has its unique way of maintenance, so make sure to read the instruction manual carefully that comes with it.

Final thoughts

When compared to the traditional type of tank-style water heaters, it is an irrefutable fact that tankless water heaters are a great choice with long term benefits. Of course, if you are planning to buy it, make sure that the model is according to your needs before investing in it.