The average lifespan of the heating elements in energy-efficient tankless electric water heaters can vary depending on several factors, including the quality of the unit, the local water quality, and how well the unit is maintained. However, on average, you can expect the heating elements in a tankless electric water heater to last between 7 to 10 years.
Regular maintenance, such as descaling or flushing the unit to remove mineral deposits from hard water, can help prolong the lifespan of the heating elements. Additionally, choosing a high-quality tankless water heater from a reputable manufacturer and following the manufacturer’s recommended maintenance schedule can contribute to longer-lasting heating elements.
Keep in mind that some manufacturers may offer warranties on their tankless water heaters that cover the heating elements for a specific period. Be sure to check the warranty terms when purchasing a unit, as this can provide additional protection and peace of mind regarding the longevity of the heating elements.