How long Navien systems last depends on type, with Navien tankless water heaters lasting 20 years or more and Navien boilers lasting 15 to 20 years with proper maintenance, which is competitive with other premium brands. Navien was founded in 1978 in South Korea, headquartered in Seoul, South Korea, makes Navien tankless water heaters and boilers with high-quality stainless steel heat exchangers designed for long life. Navien tankless water heaters, costing $1000 to $2500, average 20 years lifespan, up to 25 years with proper maintenance including annual flushing to remove scale, cleaning inlet filter, and professional inspection, with 15-year heat exchanger warranty. Navien boilers, costing $3000 to $6000 for unit, average 15 to 20 years lifespan with proper maintenance including annual professional tune-up, filter changes, and water quality management, with 10-year heat exchanger warranty. Factors that affect lifespan include water hardness, with hard water shortening life if not softened, usage frequency, and maintenance. Compared to tank water heaters that last 10 to 15 years, Navien tankless lasts longer. So Navien systems last 20 plus years for tankless and 15 to 20 years for boilers with maintenance, long-lasting, reliable, with good warranty supporting long life, making them good long-term value despite higher upfront cost.
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