CleanAire HEPA and carbon filter packs are designed to be mounted inline in exhaust ducting from a fume hood or contaminant source up to 1,500 cfm. The filter pack includes a galvanized steel housing with a hinged and gasketed access door for filter change-out. The molded composite resin inlet and outlet plenums with duct-connection collars are sized to meet specification. The HEPA filter is 99.99 percent efficient in removing particulate 0.3 micron size and larger.