Note: The numbers generally shift upward under the updated system. Do not panic if you see a "1.8 sone" label today—that is the equivalent of an old "1.2 sone" fan.
Reality: It makes ratings more accurate. A cheap, resonant fan will see a larger increase than a well-engineered, isomount fan. Good engineering is finally rewarded. sone 523 updated
The Sone 523 update has far-reaching implications across different sectors, including: Note: The numbers generally shift upward under the