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Age by Serial Number

Launching today

Find your water heater or AC’s age by serial number

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Find your water heater or AC’s age by serial number

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Free age lookups for supported water heaters, furnaces and ACs. Enter a serial number to see the manufacture date, source links and uncertain readings. Includes selected fault-code lookups and a water heater sizing calculator.

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Launch tags:Web App•Home improvement

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Hi, I'm Anders. Age by Serial Number helps you work out when a water heater, furnace or AC was made from its serial number. Choose a supported brand and enter the serial. The tools use manufacturer and government sources, show uncertain readings, and explain when a date code repeats. The result is the manufacture date, not the installation date. It’s free, with selected fault-code lookups and a water heater sizing calculator too. Which brand or format should I cover next?

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1d ago