Navien water heater age by serial number
Navien tankless water heaters have a fourteen-character serial with the year and month in the middle. Type the full serial into this Navien serial number lookup and it will find the Navien manufacture date for you.
Where do I find the serial number?
The Navien rating label is on the side of the cabinet. On a wall-hung unit it may be on the side closest to the wall, so a mirror or a phone camera helps.
How to read a Navien serial number
A Navien serial has fourteen characters. The first five are a model code. Characters six and seven are the year, character eight is the month and the next two are the day. Months 1 to 9 are digits, then X, Y and Z stand for October to December. 7410A187091234 reads as July 2018.
- Used
- 2006 to present
- Format
- Model code, then year, month character and day
- Example
- 7410A187091234
- Months
- 1 to 9 for January to September, then X, Y and Z for October to December.
Example, read
The year is the sixth and seventh characters and the month is the eighth. A US product recall notice confirms the month codes 7, 8, 9 and X for July to October.
Y for November and Z for December follow the same pattern but are not confirmed. Treat those two months as less certain.
Where to find the serial number
The Navien rating label is on the side of the cabinet. On a wall-hung unit it may be on the side closest to the wall, so a mirror or a phone camera helps.
Questions
How old is my Navien water heater?
Read characters six and seven as the year and character eight as the month. Nine and ten are the day.
Why does Navien use X, Y and Z?
The month has one character, so October to December become letters. A US recall notice confirms X for October. Y and Z for November and December follow the same pattern but are not yet confirmed.
Does the decoder show the day too?
We label the day in the breakdown but give the date as a month and year, because the month is the part our sources confirm.
How sure is a Navien date?
The pattern is well supported for most months, but the format as a whole is less well documented than other brands. Check the result against any date printed on the label.
What does 7410A18X141234 mean?
The 18 is the year and X is October, so it reads as October 2018.
Can I look up a Navien model number here?
No. A Navien model number names the product line and output, which helps with parts. We decode only the serial for the date.