How old is my Rinnai unit?
Rinnai is part of Rinnai Corp. 1 serial format sourced across furnace, boiler, tankless water heater.
Serial number decoder for Rinnai
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: 9704811080
- Rinnai furnace serial numbers in the era not stated format encode the year as digits 1-2 (YY) and the month as digits 3-4 (source: building-center.org).
- Example: serial 9704811080 decodes to April 1997.
- Rinnai's official lookup at rinnai.us returns n/a; warranty questions by phone (800) 621-9419.
Decoder pages by product
Format eras
- era not stated PARTIAL
##########Tankless Water Heater, Boiler, Furnace
Official lookup: the authority
Rinnai: no online serial lookup (n/a; warranty questions by phone (800) 621-9419).
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- The era not stated format is only partially confirmed (VERIFIED-partial).