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How long do water heaters last?Lifespan, repair costs, when to replace
How long do furnaces last?Lifespan, repair costs, when to replace
How long do AC units last?Lifespan, repair costs, when to replace
Where to find the serial numberData plate locations by unit type

UnitAgeCheck is an independent tool and is not affiliated with, endorsed by, or sponsored by any manufacturer. Brand names are used only to identify equipment. Dates and estimates are based on published manufacturer formats and typical ranges — always confirm against your unit's data plate and a licensed contractor.

How long do water heaters last? · Furnaces · AC units

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