Tankless water heaters should absolutely be serviced and flushed with a mild descaling solution every single year to ensure optimal performance and long-term durability. Annual maintenance prevents calcium and hard water mineral scale from accumulating inside the narrow channels of the copper heat exchanger, which can otherwise restrict water flow, reduce energy efficiency, and trigger error code lockouts. Routine yearly servicing preserves the expected twenty-year lifespan of the unit and protects your investment.
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