Bosch® Water age

How to determine the date of production/manufacture or age of Bosch^® 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: Bosch

Subsidiaries:

The date of production/manufacture or age of Bosch 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: 388123456

→Style 2: FD687400341

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

Note: Bosch uses a proprietary numbering system to code the date of manufacture in their serial numbers. All of the first 3 digits in the serial number MUST be used to accurately determine the date of manufacture. The first digit represents year of manufacture. To determine decade, the next 2 digits designating month must be considered as they changed with the decade. See charts below.

→Style 1: 388123456

Year of manufacture can be determined by using the 1^st digit of the serial number

Month of manufacture can be determined by using the 2^nd & 3^rd digits of the serial number

CAUTION: All of the first 3 digits in the serial number MUST be used to accurately determine the date of manufacture. See chart.

Beginning in 2010, the date of manufacture is clearly printed on the data/rating tag.

→Style 2: FD687400341

Similar to style 1 - Simply disregard the letters at beginning of serial number.

Year of manufacture can be determined by using the 1^st digit of the serial number

Month of manufacture can be determined by using the 2^nd & 3^rd digits of the serial number

CAUTION: All of the first 3 digits in the serial number MUST be used to accurately determine the date of manufacture. See chart.

Beginning in 2010, the date of manufacture is clearly printed on the data/rating tag.

Bosch® History¹

Coming soon

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: 09/03/2023

Any of the trademarks, service marks, collective marks, design rights or similar rights that are mentioned, used or cited in the articles of the Building Intelligence Center (www.building-center.org) are the property of their respective owners. Their use here does not imply that you may use them for any purpose other than for the same or a similar informational use as contemplated by the original authors of these articles under the CC-BY-SA and GFDL licensing schemes. Unless otherwise stated Building Intelligence Center (www.building-center.org) sites are neither endorsed by nor affiliated with any of the holders of any such rights and as such Building Intelligence Center (www.building-center.org) cannot grant any rights to use any otherwise protected materials. Your use of any such or similar incorporeal property is at your own risk. This guide is intended to assist Commercial/Residential Building Inspectors, HVAC professionals, Facilities Managers, HOA’s, etc.., in determining the date of manufacture and/or age of HVAC equipment to determine the expected useful life (EUL). This web site should not be relied upon for commercial use or interpretations. Accuracy and reliability of the information provided is believed accurate but is not guaranteed. The burden for fitness of information provided relies solely and completely with the user. In no event will Building Intelligence Center or its representatives be liable for any loss or damages whatsoever for consequential, incidental, indirect, special, or tort damages of any kind, including but not limited to loss of data, lost profits, business interruption, loss of business information, or other pecuniary loss that might arise from the use of or reliance on the information provided within.