MERV-11 Single 20x20x4 Furnace Filter
Looking to replace the air filter in your furnace? This MERV-11 furnace filter is ideal for those with moderate allergies! This 20x20x4 pleated filter has a galvanized expanded metal backing, heavy-duty frame, and is moisture resistant. The MERV 11 is tested under ASHRAE 52.2-2007 standards. Pleated Panel Filters outperform ordinary furnace filters with higher efficiency and lower pressure drop allowing air-handling systems to stay cleaner and operate more efficiently. Lasts up to 3 months!
Actual Furnace Filter Dimensions: 19-3/8" x 19-3/8" x 3-5/8"