I’ve heard more than a few stories about catastrophic system failures — most of which were easily avoidable, given their forensic trail to negligent lack of maintenance.
Superseding ANSI/AMCA Standard 301-14, ANSI/AMCA Standard 301-22 applies to any fan for which a test standard for measuring sound-power levels exists. Stakeholders include fan manufacturers, building designers, engineers, and acoustic consultants.