Central (commercial-grade) tank water heaters typically last 10-15 years and cost about $3,500-$10,000 per unit installed at 2026 prices. Commercial gas tank units carry a 10-15 year useful life in commercial EUL charts (electric 15-20), and light-duty commercial equipment costs roughly $1,000 more than comparable residential units before venting, permits, and expansion tanks. Capacity, fuel type, recovery rate, and venting complexity drive the spread.
Last verified 2026-07-06
Typical useful life
10–15 years
2026 replacement cost
$3,500–$10,000
per unit, national range
Typical HOA quantity
2 central water heaters
Fund each central water heater as its own short-cycle component — at 10-15 years it turns over two to three times for every boiler replacement, which boards routinely underestimate. Note capacity (e.g., 100-gallon) and BTU input on the component list, and consider whether the next cycle should move to redundant smaller units or tankless banks so a single failure doesn't leave the building without hot water.
Flush sediment annually, replace sacrificial anode rods every 3-5 years, and test temperature-and-pressure relief valves — these three habits are the main difference between a 10-year and a 15-year tank. Keep recirculation pumps and mixing valves serviced, since their failure overworks the heater itself.
Hard-water regions (Southwest and much of the Midwest) can cut tank life nearly in half without flushing and anode replacement, and West Coast seismic strapping and venting codes add installation cost.
National 2026 ranges · verify with local bids.
Typical small HOA: 2 central water heaters
Set-aside = replacement cost ÷ useful life (10–15 years). A new installation funds toward the long end; an aging one needs catch-up funding — run the full calculator for that.
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Retrieved and verified 2026-07-06. National planning ranges — local bids govern. Informational only; not engineering, legal, or financial advice, and not a substitute for a professional reserve study. Report a data issue.
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