Camfil Farr Air Pollution Control’s new HemiPleat® NoOval™ replacement filter has an innovative “oval to round” configuration that allows a perfect fit into down flow-style dust collectors that use oval filters. The HemiPleat’s open-pleat design allows greater media utilization, which extends the life of the filter and increases energy savings. Camfil Farr APC,, (800) 479-6801.