How to choose fan filter units for cleanroom?

Picking the right fan filter unit for clean room use requires a clear understanding of your cleanroom's specifications. The cleanroom's classification is a primary consideration—higher classes like ISO 5 need more air changes per hour (ACH), necessitating additional FFUs. The required ACH depends on the classification and specific processes, which may demand increased air circulation. Filter type is also key: HEPA filters suit most applications, while ULPA filters are better for stringent environments, ensuring compliance with the cleanroom's classification standards.