Heat pump water heaters have a six- or ten-year warranty. With proper maintenance they may last much longer. Annual maintenance includes draining the tank to flush mineral deposits from the base of the tank once or twice a year depending on the water quantity. The heat pump air filter should be checked and cleaned when the alarm or indicator light is active. Filter cleaning should happen every 6 months to a year depending on surrounding conditions, and heat pump water heaters located in dusty areas may require monthly cleaning. HPWH filters can typically be vacuumed or rinsed in the sink.
