Nordic Pure 20x22x1 MERV 13 Plus Carbon AC Furnace Filters Qty 6 Actual Size Of Air Filter: 19 1/2 x 21 7/16 x 3/4 (19.5x21.44x0.75) Measure your current filter and compare the exact dimensions with the Actual Size listed above before you order. MERV 13 Plus Carbon media is ideal for high efficiency air filtration. These filters control VOC's, odors and will help those with moderate to severe allergies. Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA!