Rheem HVAC Age Lookup by Serial Number
Decode your Rheem serial number to find the manufacturing date, system age, and maintenance recommendations. Free and instant. No account needed.
Finding Your Rheem Serial Number
Check these four spots on your HVAC system
Common Locations
What to Look For
- White or metallic manufacturer sticker
- Labeled "Serial No." or "S/N"
- Typically 8–12 characters long
- Usually near the model number
Can't find it? Try the electrical access panel on the front of the outdoor unit or inside the air handler cabinet.
Serial Number Examples
Don't worry if yours looks different — each brand has multiple formats and our system can decode most variations.
About Rheem HVAC Systems
Rheem was founded in California in 1925 and became best known for water heaters, but the HVAC operation is equally large. The company makes central air conditioners, heat pumps, and furnaces under both the Rheem and Ruud names, and has been a Paloma subsidiary since 1988. HVAC manufacturing happens in Fort Smith, Arkansas. One thing worth noting: the serial number format is exactly the same whether you're looking at a Rheem water heater or a Rheem heat pump. Positions 2 and 3 are the two-digit year; positions 4 and 5 are the manufacturing week.
Supported Brands
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