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Tankless Water Heater Pros and Cons

Tankless water heater mounted on a wall

People are using tankless water heaters now more than ever! This is not a coincidence since it brings many benefits and works exceptionally well for residential and commercial requirements; tankless water heaters have emerged as a great alternative to tank water heaters.

Although a tankless water heater has many characteristics that make it a good option, every product has pros and cons. Yes, it is not all roses. Therefore, in this blog post, we will tell you about the tankless water heater pros and cons so that you can see if this is genuinely a good option for you.

How Does a Tankless Water Heater Work?

A tankless water heater is also known as a demand-type water heater, and this is because of its way of working.

The tankless water heaters are gas or electric-powered. It all begins when you turn on the hot water tap. Then, the cold water will start traveling through the tankless unit, and the flow sensor will signal the panel to begin heating the water.

The heat exchanger captures heat from the flames and transfers it to the water moving through the exchanger’s tubing. Also, they count on a temperature sensor, which guarantees the water is at the desired temperature and doesn’t exceed or fall short of the desired setting.

Let’s Take a Closer Look at the Tankless Water Heater:

Adjusting temperature of a tankless water heater

In contrast to the tank water heater, the tankless water heater heats water instantaneously without a storagse tank.

Let’s Explore the Pros!


A water heater is essential for our well-being; they heat water for use in the kitchen, sink, bathroom, kitchen, and other places where warm water is desired. Let’s face it: who doesn’t love to take a warm shower to relax after a heavy day?

Save Energy & Money:

Tankless water heaters consume 24 or 34% less energy because they only work when there is a hot water demand, reducing the cost of your bill and saving you money.

So, we can firmly say that although the tankless water heater has a high upfront cost, it will pay for itself in just a few months. Rather than heating a bunch of water that may never get used, tankless heaters only heat the water you need.

Space Saving:

These appliances are also much smaller than their traditional counterparts and are usually mounted on the wall, which is great for properties with reduced spaces, so you won’t have to deal with the big tank.

In addition, demand-type water heaters have an appealing design, so even if you install them in a place where you can see them, you can rest assured that they will even look elegant.


A regular water heater has a lifespan of 15 years, and a tankless water heater has a lifespan of 20, which makes it stand out from the regular one. It can work even more years if provided with proper and routine maintenance.

Environmentally Friendly:

Tankless water heaters produce fewer carbon emissions than traditional ones and consume less energy because they only work when there is a hot water demand, making them an environmentally friendly option.

Let’s Explore the Cons!

Gray Tankless water heater mounted on a wall

Tankless water heaters bring many benefits and do their job well. However, one of the basic rules of the universe is that nothing is perfect.

So, if we take a closer look at the tankless water heater, we can find some disadvantages, such as the following:

Low Water Rate:

Typically, tankless water heaters provide hot water at a rate of 2–5 gallons per minute. Gas-fired tankless water heaters produce higher flow rates than electric ones.

So, sometimes, the tankless water heaters cannot supply enough hot water for simultaneous, multiple uses in large households (Even the largest models).

For instance, if you shower and run the dishwasher simultaneously, you can stretch the tankless water heater to its limit.

You could solve this problem by installing 2 or more tankless water heaters, but it will be costly, which makes it a considerable drawback of this machine.

High Upfront Cost & Maintenance Requirements:

Another drawback of a tankless water heater is its upfront cost. This appliance is considerably more expensive to buy and install than the traditional tank water heater.

Additionally, they require maintenance more often than the others. Although it can vary for many reasons, they need maintenance once a year on average.

Should You Have a Tankless Water Heater?

A man inspecting a tankless water heater

When it comes to heat water for your home, you have two primary options: Tank water heater & tankless water heater.

In recent years, demand-type water heater (Tankless water heater) has been gaining more and more popularity. However, as with every appliance, tankless water heater has its own pros and cons.

We already know the tankless water heater pros and cons. Now, let me give you a professional piece of advice: If you can afford to pay for the upfront cost of a tankless water heater, do it.

The cons of a demand-type water heater do not overshadow the benefits. So, by getting this modern model, you will save energy, money, and space.

Ready to get a tankless water heater, ensuring you receive an affordable and high-quality installation? You just need to contact BG Plumbing! Our professional plumbers guarantee that your tankless water heater will last for decades to come, working at its best.

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