Aerostar Furnace Filter 18x20x1

Aerostar Furnace Filter 18x20x1

• Actual size: 17 1/2" X 19 1/2" X 3/4", nominal Size: 18x20x1, AC furnace filter box of 12, merv 13
• Comparable to 3M Filtrete mpr 600 clean living
• Comparable to Honeywell micro defense Plus fpr 5
• Fights lint, dust mites, molded spores, pollen, pet dander, and dust
• Change frequency 60-90 day, made in Canada