The FACET Mono Pleat is the one pleat for residentialcommercial and industrial use. It is an inexpensiveupgrade from 1" fiberglass panels and combines highperformance filtration capability with a uniqueMonobond frame construction.The Mono Pleat utilizes a one piece wrap-around kraft boardframe. The filter element is mechanically bonded to the frame by a thermal plastic sealant activated by applied heat and pressure. This monobond frame design prevents sagging and provides overall filter strength necessary for residential commercial or light industrial use.The filter element is a cotton/polyester blended materiallaminated to a galvanized steel expanded metal support grid. When tested in accordance with ASHRAE 52.1 ? 1992 Test Standard the fiber blend maximizes dust retention capabilities while giving the Mono Pleat an average arrestance of 85-90% and an average efficiency of 20-25%.