Sones rating - How To Discuss

Sones rating

What do the CFM and Sone ratings mean? In general, there is no good or bad sound rating, as the acceptable sound level generally depends on your personal preference and sensitivity to sound. If you want to compare the hood noise level, remember that the noise level is higher when the CFM (cubic feet per minute) rating is also higher. CFM measures the amount of air movement generated by a fan. The more air circulating in the extractor hood, the more noise it produces.