What label must post-January 1, 2008, non-UL 300 systems display?

For non-UL 300 systems installed after January 1, 2008, the label that must be displayed is a red tag. This labeling requirement is crucial because it indicates that the system does not meet the updated standards established for commercial cooking operations. The red tag serves as a visual warning and helps ensure that individuals are aware of the potential inadequacies of the system in terms of fire suppression capabilities specifically related to grease fires in commercial kitchens.

It is important to understand that a red tag does not imply that the system is not operational; rather, it is an indication of compliance status, alerting users and inspectors that the system does not adhere to the latest safety regulations put forth by the Underwriters Laboratories. Therefore, identifying these systems through proper tagging helps maintain safety standards in environments where fire hazards are prevalent.