18″X18″X1″ Merv 8 Pleated Filter

The filter is completely factory assembled and constructed with a pleated media pack of a high nonwoven fabric. It is installed into a heavy-duty, double-wall, moisture resistant, die-cut, craft board frame or a rigid, galvanized steel frame. The media pack is glued into the interior walls face support members of the frame; eliminating air bypass and filter failure. The filtration media is glued to a non-corrosive, wire, support grid. This feature results in pleat stability, spacing, and proper dust loading under new airflow conditions. The filter is extremely rigid and will not give way to racking, warping, or collapse under normal handling or airflow conditions. For Phoenix Guardian R500 HEPA System