How old is my Ruud unit?
Ruud is part of Rheem Manufacturing. 3 serial formats sourced across central air conditioner, heat pump, furnace, water heater, tankless water heater.
Serial number decoder for Ruud
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: W291013412
- Ruud air conditioner serial numbers in the era not stated format encode the year as digits 4-5 (YY) and the week as digits 2-3 (source: building-center.org).
- Example: serial W291013412 decodes to week 29 of 2010.
- Ruud air conditioner serial numbers in the era not stated format encode the year as digits 3-4 after the middle factory letter and the week as digits 1-2 after the middle factory letter (source: building-center.org).
- Example: serial 7351 M2806 16735 decodes to week 28 of 2006.
- Ruud air conditioner serial numbers in the era not stated format encode the year as digits 3-4 (YY) and the month as digits 1-2 (MMYY prefix) (source: building-center.org).
- Example: serial 0804B10488 decodes to August 2004.
- Ruud's official lookup at rheem.registermyunit.com returns warranty terms.
Decoder pages by product
Central Air Conditioner2 formatsHeat Pump2 formatsFurnace2 formatsWater Heater1 formatTankless Water Heater1 format
Format eras
- era not stated VERIFIED
A#########Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - era not stated VERIFIED
#### A#### #####Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - era not stated VERIFIED
####A#####Water Heater, Tankless Water Heater
Official lookup: the authority
Open the official Ruud lookup takes serial; returns warranty terms; URL unverified
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- Ruud is treated as sharing Rheem's format because the source lists it in that family; the corporate relationship itself is an estimate.
- Rheem acquired Ruud in 1959 (building-center). Ruud page lists the identical six Rheem HVAC styles (W291013412; CB5D302F099903346; 7351 M2806 16735; OR177 M2807 00097; 0804B10488 MMYY; 123451872) with the same chart images (Rheem-HVAC-style-1..6). ruud.com is (c) Rheem Manufacturing Company and ruud.com/warranties 404s; the lookup lives on Rheem's registermyunit portal (curl 200). Water-heater page: https://www.building-center.org/ruud-water-heater-age/ (not fetched this batch).