^Maintains a UL Tested NEMA Type 12 seal against enclosure ^UL Recognized to UL 508A, category NITW2/8, UL File #E175229 ^CSA #246217 ^Patented “Click & Fit” design provides a hardware-free installation ^Plastic made from strong, heat resistant ABS-FR, UL 94 V0 fire approved material ^Fluted, durable filter provides superior service life between maintenance (up to 3X alternative filter materials)