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How Long Should a Tankless Water Heater Last?

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If you’re about to buy a new water heater and you’re currently comparing the options, one of the things you’ll want to take into account is the durability and long-term performance of each type of water heater. You want your heater to last a long time and provide the security that comes with durability.

Tankless water heaters are known to last longer and offer greater durability than regular tank water heaters. But how long should your tankless water heater last? And what makes them more durable than other options? Here’s what you need to know:


Most tankless water heaters will last for up to 20 years or more, which is a long lifespan in comparison to tank water heaters, which last around 10–15 years. 

Tankless water heaters use new technology that helps them to stay functional and operational for much longer than some of the alternatives out there. They’re at the cutting edge of water heating technology and many of the newer models are even increasing their lifespans years past the expected 20 years.

The longer lifespans of tankless water heaters can be highly beneficial. Not having to worry about replacing a failing water heater for a couple of decades offers both peace of mind and a lower overall cost.

Easily Replaceable Parts

If a problem does occur with your tankless water heater before its 20-year lifespan is complete, it can usually be fixed relatively easily. Most replacement parts for tankless heaters are very easy to find, and keeping up on regular maintenance can increase the lifespan of your heater.

Keep in mind that some parts are more expensive compared to parts for tank water heaters, but they’re very easy to install, meaning experts won’t have to spend a lot of time resolving issues that occur.

Fewer Corrosion Problems

Another benefit that tankless water heaters have is that they don’t suffer from the same corrosion problems often associated with tank water heaters. This is because many issues with water heaters tend to be associated with the tank itself, whether it be a leak, rust, or sediment buildup.


The durability and lifespan of a tankless heater can depend on how it is installed, so if you’re currently looking to purchase a tankless water heater, be sure to have the necessary work carried out by a professional who knows what they’re doing. Even though professional installation costs are more expensive on a tankless heater than on a tank type heater, it’s worth the extra cost to ensure your heater works properly and lasts longer to save you money down the road.

It’s also important to know that tankless water heaters need to be located correctly in the home. They’re quite small because there is, of course, no tank taking up space in the home, which can be advantageous for smaller homes. Keep this in mind as you work with a professional to make accommodations in your home that will allow your tankless heater to last as long as possible.

Overall, tankless water heaters are a great option for those who are seeking greater durability and a longer lifespan for their water heater. They can also save you a lot of money in energy bills and replacement costs down the road, and they are more environmentally friendly.

If you need installation service for a new tankless heater or a repair service to ensure your current tankless heater lasts as long as possible, reach out to The Water Heater Company today.

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