How old is my Noritz tankless water heater?
Serial number age decoder for Noritz tankless water heaters: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: 2005.06-004472
- Noritz tankless water heater serial numbers in the era not stated format encode the year as digits 1-4 (YYYY) and the month as digits 6-7 (source: building-center.org).
- Example: serial 2005.06-004472 decodes to June 2005.
- Noritz's official lookup at noritz.com returns warranty / registration lookup.
Format eras
- era not stated VERIFIED
####.##-######digits 1-4 (YYYY)
How to read the serial
era not stated formatVERIFIED
Shape ####.##-###### · example 2005.06-004472 · confidence high
- Year
- digits 1-4 (YYYY)
- Week or month
- month = digits 6-7
Example: serial 2005.06-004472 decodes to June 2005.
Where the data plate is on a tankless water heater
On the side or bottom of the wall-hung cabinet, or inside the front cover on the frame.
General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.
For scale only: the InterNACHI Standard Estimated Life Expectancy Chart for Homes lists Instant (on-demand) Water Heater at 10 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.
Open the official Noritz lookup takes serial number; returns warranty / registration lookup; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- Serial is a literal YYYY.MM-###### (2005.06-004472). noritz.com/warranty/ is the warranty page (registration/terms); no age lookup.
Sources
- https://www.building-center.org/noritz-water-heater-age/
- img: NORITZ-WH-Style-1-Date-of-Manufacture.png
- https://noritz.com/warranty/official