How old is my Ruud equipment?
Enter the serial number from the label. The date comes from Ruud's documented serial rules, not a guess.
Rheem’s own documents cover Ruud: its water-heater service bulletin is titled “How to Locate and Read Rheem/Ruud/Richmond Serial Numbers”, and Rheem/Ruud installation manuals list Ruud as one of the brands. We decode Ruud heating and cooling equipment and Ruud water heaters, but they use different serial formats, so choose the right equipment type before you decode.
By equipment type
Ruud furnace age
Typical life: 15–20 years
Ruud air conditioner age
Typical life: 10–15 years
Ruud heat pump age
Typical life: 10–15 years
Ruud water heater age
Typical life: 8–12 years
Ruud tankless water heater age
Typical life: 15–20 years
Questions
- Is a Ruud water heater dated the same way as a Ruud air conditioner?
- No. On Ruud heating and cooling equipment, the four digits after the plant letter are the week and then the year. Ruud water heaters built before 2012 start with the month and then the year (Rheem’s template 1209D01234 is December 2009), while newer ones, from 2012 as each plant switched over, use a plant letter followed by the week and year.
- Does a model number starting with R mean the unit is a Rheem?
- No. Ruud’s own spec sheets print “R - Ruud” on models such as the RA14AZ and R801C, and a Rheem/Ruud manual says “R = RHEEM/ RUUD (ALL TRADEBRANDS)”. A U at the start, as on the UA16AZ or U96V, is used only by Ruud.
- How can I tell a Ruud water heater from a Rheem one by the model number?
- On the Professional tank heaters, Rheem and Ruud share the base number and the suffix tells them apart: RU for Ruud (as in PROG50-38N RU60) and RH for Rheem. Ruud tankless models start with RUTG.
- How do I find the age of my Ruud equipment?
- Enter the serial number from the rating plate above. Ruud uses the Rheem / Ruud HVAC serial format, which includes the manufacture date.
Same serial format
Sources
- CPSC 1999: Rheem electric furnace / air handler recall ('four digits following the letter M' = week + year)
- CPSC 2009: Rheem oil-fired furnace recall (date code after the middle letter)
- How To Look At A House: Rheem air conditioner or furnace age (plate-confirmed examples)
- Building-Intelligence Center: Rheem HVAC age
- Rheem Technical Service Bulletin 1207: How to locate and read Rheem/Ruud/Richmond serial numbers
- CPSC 2016: Rheem water heater recall (serial date codes)
- Rheem: How to locate and read your water heating serial numbers
Rules last reviewed 2026-09-28. These rules are in Beta while we verify more real-world examples, so results are capped at medium confidence.
Manufacture dates are decoded from manufacturer serial-number conventions and available documentation. Serial formats can change. Verify critical equipment information with the manufacturer when necessary.