Fiberbond's ULTRAKLEEN rigid box filter is designed for medium and high efficiency applications and is excellent in variable air volume systems.With its SPOR-AX antimicrobial media, a highly effective biocide, it effectively controls growth of mold, mildew, algae and fungi on the filter.

The media is a non-carcinogenic,non-shedding synthetic fiber, bonded with a flame retardant binder system.