RE: Choosing a cleanroom classification
It depends on your industry, the production needs, the criticality of cleanliness and the level of particulate that could hurt your production process. The requirements will vary depending upon what size particles need to be filtered, the sources of contamination present, and recommended air change rate. If your industry is government regulated, make sure that you check the governmental regulations for your industry. If there is no government-mandated or industry default classification, you’ll need to determine the appropriate classification, based on your application, manufacturing process, people process and overall cleanliness requirements.