Basics Merv 11 AC Furnace Air Filter - 20'' x 20'' x 1'', 6-Pack

• AC/Furnace filter for capturing household irritants, improving air quality, and promoting furnace efficiency; 20 x 20 x 1 inch filters, 6-pack
• Merv 11 rating for residential use; comparable to MPR 1000-1200 and FPR 7
• Captures allergens between 3-10 microns including lint, dust, and pollen
• Beverage board frame, wire mesh support, and electrostatically charged synthetic filter material
• For optimal results change filter every 60 to 90 days