The Honeywell PopUP filter solves your storage hassles, and provides a highly efficient MERV 11 filter. This new innovation in air filtration, with its collapsible design, is packaged packaged folded flat. Five of these unique filters can be stored in the space of one conventional cartridge filter! Also eliminates the need for those annoying pleat spacers.
Meets American Lung Association Healthy House guidelines. Honeywell recommends replacing the filter every 12 months, or more often if the filter appears dirty to the point of blocking air flow through the heating/cooling equipment.