Clean room fan filter units (FFU) are critical components in maintaining a clean and controlled environment. FFUs are used in a variety of industries and settings, including pharmaceuticals, electronics manufacturing, and food processing.

The primary function of an FFU is to circulate and filter air within a clean room environment. FFUs typically consist of an enclosed fan motor and a filter, which are combined in a compact housing. These units are strategically placed on the ceiling of the clean room to blow air downward in a unidirectional flow, creating a positive pressure environment that prevents the entry of contaminants.

FFUs are designed to maintain the highest level of cleanliness by eliminating airborne particles from the environment. Typical FFUs have the ability to remove particles as small as 0.3 microns, ensuring that the air in the cleanroom is free of contaminants that could pose a threat to the manufacturing process.

Filter efficiency is measured using the High-Efficiency Particulate Air (HEPA) standard. HEPA filters are capable of removing at least 99.97% of airborne particles up to 0.3 microns in size. FFUs with HEPA filters are capable of achieving a cleanroom classification of ISO 7 or better.