Schedule Your Service Today!





How Long Does A Tankless Water Heater Last?

How Long Does A Tankless Water Heater Last?

Tankless water heaters are a great upgrade to any home or business that has previously only utilized a traditional tank water heater. Many wonder, however, how long these types of water heaters last, as they can cost more upfront than a traditional tank water heater model. So, if you’re also asking the question of how long does a tankless water heater last, whether due to an aging unit or the consideration of buying one for the first time, read on for the scoop.

Water Quality

There are numerous factors that affect the longevity of a tankless water heater. One such factor, water quality, affects tankless water heater longevity, traditional water heater longevity, and the longevity of nearly all other plumbing components in a home or office. Hard water, for example, contains many particles, like calcium and magnesium, that go on to solidify inside water heaters and other plumbing components. When water quality is an issue, the internal parts of a tankless water heater will undergo much more wear-and-tear, particulate buildup, and even corrosion and clogging, that all go on to contribute to a shorter lifespan.

Brand Quality

As with most manufactured wares out there, the quality of the product is ultimately determined by how well it’s made by its manufacturer. Tankless water heaters are no exception to this rule. A better-built and often more pricey model will almost always offer a longer lifespan than a lesser model or brand.

Installation Location

The location in which a tankless water heater is installed is another significant determining factor in its ultimate life expectancy. When these systems are installed in a more climate-controlled space, such as in a utility or laundry room inside a home, they do not have to work as hard in order to warm the water they are fed. On the other hand, units installed in areas that aren’t as well covered by heating and air systems must work harder and undergo harsher conditions in general.

Fuel Type

The type of fuel that tankless water heaters utilize also tends to be a determining factor in longevity. Electric models tend to run into problems quicker, while gas tankless water heaters usually offer a bit of a longer lifespan. This is due to how these fuel types work inside of these systems and the resulting strain placed on them over time.

Realistic Tankless Water Heater Life Expectancy

In conclusion, the answer to the common question of how long does a tankless water heater last, on average, is 20 years or more. This lifespan can sometimes be extended, however, if the wear they’ve experienced is mainly on parts that are replaceable. Compared to a traditional tank water heater, this is a great increase of 5-10 years of life expectancy.

Here at E Dennis, we specialize in tankless water heaters and all of the components that make them work. In addition to tankless water heaters, we are also your complete experts on traditional tank water heaters and all other plumbing systems and individual components. We proudly serve the greater Atlanta area and are available to you seven days a week. Whether you need expert advice, a new tankless water heater installation, or plumbing repair work you can count on, give us a call today, and experience the best plumbing service around.

Americans with Disabilities Act (ADA) Notice

At E Dennis, we are committed to ensuring that individuals with disabilities enjoy full access to our websites. In recognition of this commitment, we are in the process of making modifications to increase the accessibility and usability of this website, using the relevant portions of the Web Content Accessibility Guidelines 2.0 (WCAG 2.0) as our standard. Please be aware that our efforts are ongoing. If at any time you have difficulty using this website or with a particular web page or function on this site, please contact us by phone at (770) 758-0501; or email us at and place “Web Content Accessibility (ADA)” in the subject heading and we will make all reasonable efforts to assist you.