2x2 Logi-Clean Hepa Filter Module, 99.99% Efficient @0.3 Microns, Specify 10" or 12" Collar. - Ducted filter modules provide hepa/ULPA filtered air when connected to a central air handler. Sizes are from 2’x 2’ to 2’x 4’, special sizes and configurations are available. Airflow is controlled by a damper located in the inlet collar. Final filters can be replaced from within the cleanroom. Standard features · Sealed powder coated steel housings · Filter efficiency – 99.99% at 0.3 microns and larger · Eggcrate face grille, removable filter replacement · Gasket seal against knife edge · 12” dia inlet collar · butterfly damper in collar, adjustable within room Optional features · Gel seal filter · ULPA filter - 99.9995% at 0.12 microns and larger · Perforated face grille - aluminum or stainless steel · Stainless steel construction · Special size to fit any grid system Please call or email us for information and pricing.