HEPA ducted terminal module air filters are designed for use in ducted supply HVAC installations with T-bar grid ceilings. These filters remove a minimum of 99.99% of particles as small as 0.30 microns from the air stream. They are commonly used in hospitals, operating rooms, patient isolation rooms, surgery recovery rooms, biomedical facilities, pharmaceutical processing plants, laboratories, and other locations that must meet strict air cleanliness standards. The air filters are manufactured, tested, certified, and labeled in accordance with current HEPA filter standards.HEPA and ULPA air filters are installed in HVAC systems to remove the maximum amount of contaminants from the air stream for applications that require very clean air. This maximizes indoor air quality and keeps the contaminants from building up in the equipment and damaging it. HEPA and ULPA filters provide more effective filtration than other styles of air filters and are commonly used in areas that require very high levels of contamination control, such as clean rooms, hospitals, pharmaceutical facilities, data centers, laboratories, and food processing plants. They have a box construction.