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How old is my Bosch (HVAC) tankless water heater?

Serial number age decoder for Bosch (HVAC) tankless water heaters: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.

Bosch (HVAC)'s official lookup at bosch-home.com returns warranty / registration lookup.

Format eras

before 2009 UNSOURCED
########-##-####-####

How to read the serial

before 2009 formatUNSOURCED

Shape ########-##-####-#### · example 63036333-00-7080-3241 · confidence low

Documented but not evaluated by the decoder: no year decode text.

Trap: Legacy pre-2010 styles; no fetched source decodes them. Use Bosch technical support or the spare-parts serial lookup.

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.

Official lookup: the authority

Open the official Bosch (HVAC) 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

The before 2009 format has no source we could check; it is shown for completeness only.
The before 2009 format is documented but not decodable here: no year decode text.
FD number on the rating plate (separate from the E-Nr model number) is the production date: FD YYWW + sequence, with the year offset by 20 (FD 93.. = 2013). building-center calls digits 3-4 the WEEK; some trade sources call it the month - not resolved this session (bosch-home.com US FAQ/serial pages 404; search budget exhausted). bosch-home.com/us/en = 200 (site home only; no serial lookup confirmed).