Tankless vs. Tank Water Heaters - What's Best?

April 27, 2023

Water heaters are an essential appliance in every household as they provide hot water for various purposes such as bathing, washing clothes, and dishes. Water heaters come in two main varieties: tank-style and tankless. In this article, we will compare tankless water heaters and tank water heaters to help you determine which one is the best for your home.

Tank Water Heaters

Tank water heaters store a certain amount of water in a tank and use electricity or gas to heat the water. The hot water is then stored in the tank, ready to be used whenever it is needed. Tank water heaters are available in different sizes, with larger tanks providing more hot water and smaller tanks providing less hot water.

Advantages of Tank Water Heaters

Cost-Effective: Tank water heaters are typically less expensive than tankless water heaters, making them a more cost-effective option for many households.

Easy to Install: Tank water heaters are relatively simple to install, which means that installation costs can be lower compared to tankless water heaters.

Plenty of Hot Water: With a large enough tank, tank water heaters can provide enough hot water for even the busiest households.

Disadvantages of Tank Water Heaters

Limited Hot Water Supply: If the hot water in the tank runs out, you will have to wait for the tank to heat up more water, which can take some time.

Energy Inefficiency: Tank water heaters continuously heat the water in the tank, even when hot water is not being used. This results in energy waste and higher energy bills.

Limited Space: Tank water heaters can take up a significant amount of space, which can be a problem for households with limited storage space.

Tankless Water Heaters

Tankless water heaters, sometimes referred to as "on-demand" heaters, provide hot water only when it is required. These water heaters do not store hot water in a tank, which means that you will never run out of hot water. Instead, tankless water heaters use gas or electricity to heat the water as it passes through the unit.

Advantages of Tankless Water Heaters

Unlimited Hot Water: With a tankless water heater, you will never run out of hot water because the water is heated on demand.

Energy Efficiency: Tankless water heaters only heat water when it is needed, which means that they are much more energy-efficient compared to tank water heaters.

Space-Saving: Tankless water heaters are much smaller and more compact compared to tank water heaters, making them a great option for households with limited storage space.

Disadvantages of Tankless Water Heaters

Higher Initial Cost: Tankless water heaters are typically more expensive than tank water heaters, which can make them a less cost-effective option for some households.

Professional Installation Required: Tankless water heaters are more complex to install compared to tank water heaters, which means that installation costs can be higher.

Limited Flow Rate: Tankless water heaters have a limited flow rate, which means that they may not be able to provide hot water for multiple uses at the same time.

Which One is the Best?

The best water heater for your home will depend on your specific needs and circumstances. If cost is a major consideration, a tank water heater may be the best option for you. However, if energy efficiency and unlimited hot water are important factors, a tankless water heater may be the better choice.

One of the best tankless water heaters on the market is the Rinnai RUR199iN. This high-quality tankless water heater is energy-efficient and provides an unlimited supply of hot water. It is also compact and easy to install, making it a great option for households with limited storage space.

In conclusion, both tank water heaters and tankless water heaters have their advantages and disadvantages. It is important to carefully consider your specific needs and circumstances before making a decision. If you are still unsure which type of water heater is best for your home, it may be helpful to consult a professional plumber for advice.


I believe in making the impossible possible because there’s no fun in giving up. Travel, design, fashion and current trends in the field of industrial construction are topics that I enjoy writing about.

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