At One Place

How long does a water heater last?

Typical lifespan
8–15 yr

A tank or on-demand heat exchanger that supplies hot water to a building.

Typical service life before replacement.

By type

Water heaters vary by type, so a single figure would be misleading.
Type Typical lifespan
tankless water heater 15–25 yr

How that compares

Water heater against things of a similar time.

Car 8–20 yr
Water heater 8–15 yr
Tiger 8–26 yr
Washing machine 8–14 yr
German shepherd 9–13 yr
Black mamba 10–20 yr
Golden retriever 10–13 yr
Doberman pinscher 10–13 yr

What that means over time

Assuming the typical lifespan above and immediate replacement.
Period How many you would buy
Per year 0.0909 replacements
Over 10 years 1 of them
Over a 30-year mortgage 2.7 of them

Lifespans are medians under ordinary use, not guarantees. Maintenance, how hard it is used, and build quality move individual examples a long way in both directions — which is why the range above is as wide as it is.

More about a water heater

Common questions

How long does a water heater last?
A water heater lasts 8–15 yr. Typical service life before replacement.
Which type of water heater is the heaviest?
Of the types listed here, tankless water heater is the largest at 15–25 yr.

Related pages

Sources

  1. Typical range compiled from manufacturer specifications — At One Place

How these figures are compiled and checked