PERMA-HOOD™ is a unique roomside removable filter ceiling module. Engineered for simplicity, PERMA-HOOD™ requires no tools to install or replace. It is available in efficiencies from 99.97% @ 0.3 microns to 99.99999+% @ 0.12 microns. In addition, filters with pressure drops as low as 0.26" w.g. with 100 FPM velocity can be specified. The faceguard and damper are integral with the filter. A removable faceguard may also be specified. These and other unique features make PERMA-HOOD™ the easiest to handle of all RSRs.