Rinnai® Water age

How to determine the date of production/manufacture or age of Rinnai^® brand Water Heater Systems.

Water heaters in general have an average estimated useful service life of 10-12 years, though water quality, routine upkeep/maintenance, and location of the water heater will all play critical roles in the longevity of these systems.

Parent Company: Rinnai

Subsidiaries:

The date of production/manufacture or age of Rinnai brand Water Heater equipment can be determined from the serial number located on the rating data plate.

Example serial number styles/formats found:

→Style 1: BL. CA-051306

→Style 2: 04. 03-102521

→Style 3: 05083453

Legend: Year is RED; Month is GREEN; Week is BLUE

→Style 1: BL. CA-051306

Year of manufacture can be determined by using the 1^st position (letter) of the serial number

Month of manufacture can be determined by using the 2^nd position (letter) of the serial number

NOTE: This style has been used since 2009

Production Year Codes:

A= 2009
B= 2010
C= 2011
D= 2012
E= 2013
F= 2014
G= 2015
H= 2016
J= 2017
K= 2018
L= 2019

Production Year Codes:

M= 2020
N= 2021
O & P= 2022 _{(O only used for one model)}
R= 2023
S= 2024
T= 2025
W= 2026
X= 2027
Y= 2028
Z= 2029

Production Month Codes:

A= January
B= February
C= March
D= April
E= May
F= June

Production Month Codes:

G= July
H= August
J= September
K= October
L= November
M= December

→Style 2: 04. 03-102521

Year of manufacture can be determined by using the 1^st & 2^nd positions (before period) of the serial number

Month of manufacture can be determined by using the 3^rd & 4^th positions (after period) of the serial number

NOTE: This style was used prior to 2009

→Style 3: 050706654

Year of manufacture can be determined by using the 1^{st and 2nd} numbers of the serial number

Month of manufacture can be determined by using the 3rd and 4th numbers of the serial number

NOTE: This style has been used from 1999 through 2008

Rinnai^® History¹

1920 - Company incorporated in Japan
1921 - Launches first tankless water heater product
1923 - Sales and export include tabletop stoves, ranges, gas ovens, and tankless water heaters
1971 - Company changes name from Rinnai Manufacturing Co. Ltd. to Rinnai Corporation
1974 - Rinnai America Corporation is established in Los Angeles, CA
1987 - Rinnai America moves corporate office to Lagrange, GA
1989 - Rinnai direct vent wall furnace is launched
1999 - First tankless water heater is sold in North America
2001 - North American operations relocate to Peachtree City, GA
2001 - First commercial tankless water heaters make their debut
2006 - Begins manufacturing OEM tankless units for Bradford White and GE
2007 - Unveils hydronic air handler designed to work with tankless water heaters
2010 - Rinnai launches at Lowe's retail locations across the U.S.
2012 - Begins manufacturing OEM tankless units for Giant
2013 - Rinnai launches hybrid tank-tankless water heater
2014 - Rinnai Commercial Business unit is formed
2018 - Rinnai establishes U.S. manufacturing in Griffin, GA

_{^1- History excerpts from https://www.rinnai.us/about/history}

Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of water heating equipment. Users relying on this information do so at their own risk.

Page last updated: 09/04/2023

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HVAC Index

Water Heater Index

Rinnai® Water age

Example serial number styles/formats found:

→Style 1: BL. CA-051306

Production Year Codes:

Production Year Codes:

Production Month Codes:

Production Month Codes:

→Style 2: 04. 03-102521

→Style 3: 050706654

Rinnai® History¹

Rinnai^® History¹