Experience reliable air filtration with our Flanders EZ Flow II 24x24x1 Flat Panel Spun Fiberglass Furnace Filter. This standard grade filter, protecting homes worldwide for over 50 years, features a continuous filament spun glass filtering medium and a durable, corner-separation resistant chipboard frame. Measuring 24 inches in width and length, and 1 inch in thickness, it's designed to fit seamlessly into your HVAC system. For optimal performance, replace monthly during high usage periods.