Serial Number Format - Rinnai RHFE-551FA Service Manual

Serial Number Format

Water Heaters and Direct Vent Furnaces
On direct vent furnaces manufactured before June 1, 2010, the Rinnai serial number will consist of four numbers,
followed by a dash, followed by six numbers. The first four numbers are separated by a period (.). The first two
numbers indicate the year and the next two numbers indicate the month.
Example: 03.06-001000 This unit was manufactured in 2003 (03) and the sixth month (June) – (06).
On direct vent furnaces manufactured on or after June 1, 2010 the Rinnai serial number will consist of four
letters, followed by a dash, followed by six numbers. The first letter indicates the year of manufacture and the
second letter indicates the month of manufacture according to the table below.
Example: BH.AB-000123 This product was manufactured in August, 2010.
The third and fourth letters indicate manufacturing location and product type. The 6 digit number will be
sequential and reset every year.
Year/Month Table
For applicable models and manufacturing dates: the first letter indicates the year of manufacture
Year
2009 A
2010 B
2011 C
2012 D
2013 E
2014 F
2015 G
2016 H
2017 J
2018 K
2019 L
2020 M
Rinnai Direct Vent Service Manual
the second letter indicates the month of manufacture.
Year
2021 N
2022 P
2023 R
2024 S
2025 T
2026 W
2027 X
2028 Y
2029 Z
Month
January A
February B
March C
April D
May E
June F
July G
August H
September J
October K
November L
December M
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