Tankless Water Heater: Pros and Cons

The tankless water heater pros and cons must be understood for proper usage. Knowing some of the pros and cons can help you make informed decisions and it can also help you understand the process of maintaining the tankless water heater. 

Today’s article by our team at Diamondback will go over some of the tankless water heater pros and cons. Today’s blog post will also help you understand the features of a tankless water heater and get to know whether you should get one installed. You can also contact our team of qualified professionals if you need help with your tankless water heater.

Get to know how tankless water heaters work

Before discussing the tankless water heater pros and cons, we must get to know this home appliance. A tankless water heater is a sophisticated water storage that does not feature a tank. This storage system provides water as demanded since water travels inside it to the separate water taps in your house.

Tankless water supplies your house with hot water heated using electricity or gas the moment you turn it on. Understanding the gas or electric tankless water heater pros and cons is important to make an informed decision when purchasing one.

Below are the pros and cons of tankless water heater units and what you should keep in mind when considering having one installed in your home.


Here are some of the pros of tankless water heaters:

Energy-conserving features

Unlike the traditional water storage system that gulps up gas and drastically increases utility bills, tankless water heaters are energy-efficient, making them ideal for everyone. 

According to the U.S Department of Energy report, using a tankless water heater can result in about 34% energy reduction compared to the traditional tank system. Where you use a low amount of hot water, you may even save more than 34% percent. This impressive feature makes opting for tankless water the best option for everyone.

Constant hot water supply

Even though there are several pros and cons of tankless hot water heater units, it is still a fact that this appliance is a good way to have a constant hot water supply. This can be more promising than ever as you will no longer need to worry about bathing with cold water after a stressful day at work. With a tankless water heater, you can enjoy a hot shower for as long as possible.

Reduce utility bills

What naturally comes with low energy consumption is a reduced utility bill. If your daily activities require more hot water, a tankless water heater may be a graceful addition to your home. This will help reduce the amount you spend on your electricity bill.

Does not require a large space

Another impressive benefit of a tankless water heater is that it does not require a tank. As such, it does not take up your space too. 

The traditional tank water storage system can take up much space depending on the size of the tank you are opting for. This is not ideal for people with small spaces whose daily activities require more water. A tankless water heater remedies this situation and helps you free up space without reducing the quantity of water every day.

Longer lifespan

Tankless water can last for 10-20 years, depending on the model purchased. However, irrespective of whether you opt for the most expensive tankless water heater or you just purchase one that comes a little cheaper, what is certain is that you are set to enjoy this storage system for a long time. It will last enough to cover its high price. 

It will also help save a lot of money on repair or replacement, which is a major issue with the traditional tank system.


Here are some of the cons of tankless water heaters:

May not cover your hot water need from multiple outlets

Using a tankless water heater limits the amount of hot water generated from multiple outlets. The storage is best if you do not need to use hot water from multiple outlets. Using this from a single outlet at a time is the best way to enjoy it. If you use multiple outlets at a time, the temperature of the water may fluctuate.

If you need to use multiple outlets, I recommend installing more than one water heater. While this may be a little costly, the energy-consumption reduction you stand to achieve will cover the extra money in a few years.

Requires constant electricity

A tankless water heater requires constant pumping and heating of water into your house. Since these processes require constant electricity, enjoying hot water from the outlet also requires a constant electricity supply. Where there is a chance of a power outage, you may need to reconsider opting for this storage system.

Purchasing and installing a tankless water heater is more expensive

Buying and installing tankless water is far more expensive than the traditional tank system. This is why many people may reconsider opting for one despite the benefits. A single tankless water heater could cost up to $1000, and installing it may cost another $1000 or a little below. When you add this to the 10% federal tax credit, this is a lot of money worth good consideration.

However, it is also important to understand that this money is well spent. Where you can afford it, I recommend going for one and watching as it pays for itself in a few years.


Discussing the tankless water heater pros and cons does not eliminate the fact that it comes with many benefits and can be purchased at a reasonable high price. The benefits make it an ideal choice for everyone. Aside from getting constant water, you also enjoy reduced electricity bills.

It is important to consider the installation process and assign the job to a reputable plumbing company for the best outcome. Getting the right person for the job ensures that your unit is installed correctly. A professional can also help with the purchase, and this means you get to buy the best model for the price, and you also get to use it for more years.

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