Observed arrival · 2026-10-21
Mfg Date: age lookup for water heaters and HVAC
A serial-number lookup that estimates when a water heater, furnace, air conditioner or heat pump was made and how its age compares with typical service life.
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- For
- Homeowners checking the age of heating or cooling equipment
- Worth noticing
- It covers five equipment types and notes that serial-number formats can vary across brand eras.
Field notes
The guide explains that manufacturers use different serial-number conventions, and that formats may change across a brand’s production eras. It gives examples for several brands and lists typical service-life ranges, while noting that maintenance and conditions such as hard water or coastal salt air can affect lifespan. The page also recommends photographing the rating label for later reference.
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Editorial observations of this landing page, not a rating.
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