The 3-in-1 filter provides near-HEPA filtration plus odor and fume absorption in one filter. According to the manufacturer, in the first stage a reticulated foam pre-filter traps dust particles 200 microns and larger. A built-in activated carbon pad in the second stage removes chemicals, fibers, fumes, gases and more. The third stage, comprising ElectraFlo (electrostatically charged) media, traps particles to 0.3 micron and larger. The filter is available in 99-, 95- and 60-percent efficiencies and all standard sizes are available in aluminum frames with thicknesses from 0.25 to 1 inch.
ALFCO division of AirMaze