Fan Filter Units (FFUs) operate by integrating a high-performance fan with advanced filtration to maintain air quality in controlled environments. The process begins when the fan draws ambient air into the unit through an intake grille. This air then passes through a series of filters, typically HEPA or ULPA, which are designed to capture airborne contaminants such as dust, microorganisms, and particulate matter. The HEPA or ULPA filters are highly efficient, removing particles as small as 0.3 microns with a capture efficiency of up to 99.99%. As air flows through these filters, contaminants are trapped, and only clean, purified air exits the unit. The clean air is then expelled into the controlled environment, creating a sterile and stable atmosphere. FFUs can be ceiling-mounted or integrated into existing HVAC systems to provide uniform air distribution across the workspace. They are designed for minimal noise and energy consumption while delivering high airflow rates to ensure consistent air quality. By maintaining a continuous flow of filtered air, FFUs effectively reduce the risk of contamination and help sustain the high standards required for sensitive processes in laboratories, cleanrooms, and manufacturing facilities.