How long does a tankless water heater last?

• <div><p>A tankless water heater can last up to 20 years, but just how long your tankless water heater lasts depends on how much water you use, how well you <a href="https://www.angi.com/articles/tankless-water-heaters-don-t-expect-save-big.htm">maintain your water heater</a>, and the water hardness level in your area. A unit that constantly has mineral buildup from hard water may have a shorter life span.</p></div>

Is ventilation necessary for water heaters?

• <div><p>Not all <a href="https://www.angi.com/articles/types-of-water-heaters.htm">types of water heaters</a> require a venting system. Electric tankless water heaters don’t use natural or propane gas, so no venting is required. Instead, they use electric burners to heat water quickly and efficiently. However, any system that does use gas or propane will require ventilation. </p></div>

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Verified Reviews for Water Heater Service pros in ,

*The Angi rating for Water Heater Service companies in , is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.

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Last update on November 06, 2025

Reviewed in June 2024
Water heater burst and basement flooded. Julian installed a new water heater and expansion tank. He was very courteous and professional.
Apex Pros Plumbing
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Reviewed in October 2023
Installed water heater, quick service at a fair price!
Water Heaters Plus!
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Reviewed in May 2023
Eco plumbers are a joke, also quoted replacing my water heater for $2900.
Eco Plumbers, Electricians, and HVAC Technicians
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Reviewed in April 2020
John did a great job installing my new water heater!
Affordable Professional Plumbing
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Reviewed in June 2019
During a semi-annual maintenance visit for our A/C, the technician observed that our water heater had signs of corrosion and explained that if our water heater were to burst, it would flood our basement. CJS is licensed to install water heaters, so I hired them to replace ours since they did...
CJS Heating and Air Columbus
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Reviewed in November 2014
He was great! The pilot light would not stay on on my water heater, so I had no hot water. He replaced the thermocouple, and now it works perfectly.
Master Plumbing Services LLC
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Reviewed in August 2013
The provider came and told me that my water heater did not work. It was dripping water from the top. It said that it could not be fixed and that it would sell me a new water heater. I asked for a specific breakdown of the costs, but the provider refused. It is selling water heaters at an...
Buckeye Heating & Cooling
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Reviewed in February 2013
The work was finished in about an hour and a half. While they were removing the old water heater, they discovered a pinhole leak in a pipe against one of the floor joists. They replaced the piece of pipe and installed the new water heater.
Benjamin Franklin Plumbing
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Reviewed in December 2010
They were true to their word. It was a good price and hassle-free for both the furnace and the water heater.
Wolfe & Sons Heating & A/C Inc
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Reviewed in January 2009
They were out within 2 hours. Took out old heater. Installed new water heater. We upgraded to a 10-year warranty for extra dollars, but felt it was worth the money as most water heaters last only 6-7 years.
The Waterworks
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Water Heaters questions, answered by experts

Storage, tankless, heat pumps, and solar water heaters each suit specific space constraints, usage needs, and efficiency preferences.

A tankless water heater can last up to 20 years, but just how long your tankless water heater lasts depends on how much water you use, how well you maintain your water heater, and the water hardness level in your area. A unit that constantly has mineral buildup from hard water may have a shorter life span.

An average-sized empty water heater weighs around 150 pounds. Tankless water heaters are much lighter, weighing between 10 and 50 pounds. The smaller size and added convenience come at a price, though—tankless water heaters average about twice the price of their traditional counterparts.

Not all types of water heaters require a venting system. Electric tankless water heaters don’t use natural or propane gas, so no venting is required. Instead, they use electric burners to heat water quickly and efficiently. However, any system that does use gas or propane will require ventilation.

You don’t have to replace expansion tanks at the same time as your hot water heater. You may be able to go six to 12 years or more before needing to replace your expansion tank. At $150 to $450, hot water heater expansion tanks are usually much more affordable than the cost of hot water tanks themselves, which average about $1,190.

The Lisbon, la homeowners’ guide to water heater services

From average costs to expert advice, get all the answers you need to get your job done.

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Does a Tankless Water Heater Increase Home Value?
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