Atmos-Tech AT-2000 fan filter units are designed to be used in a standard or cleanroom ceiling system. The motorized impeller provides a lower profile than units with larger centrifugal blowers, but can still handle an additional .125" external static pressure. The filter element is individually scan tested to ensure leak free operation. The AT-2000 is available in 95%, 99.99% and 99.9995% efficiencies and varying filter pack depths. The standard unit is available in nominal 2' x 4' only however custom sizes are available.