Farr Air Pollution Control (Jonesboro, Ark.) is offering its new HemiPleat HE (high efficiency) filter, which has a MERV 15 efficiency rating, coupled with up to twice the service life and the half the pressure drop of conventional dust collector cartridge filters. A patent-pending design holds the filter pleats open, making virtually all the media surface available for filtration. Wide, uniform spacing results in lower pressure drop for more efficient performance, and the filter holds a larger volume of dust before requiring cleaning. It is available in several sizes to fit most cartridge collector filters.