· Nominal: 16 x 16 x 1, Size: 15 3/4"x15 3/4"x3/4" 16x16x1, AC Furnace Air Filter· Comparable to MPR 1500 to 1900 Ultimate Allergen Defense· Comparable to Honeywell Allergen Elite FPR 10· Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, smoke, viruses, and bacteria.· Change frequency 60-90 days, Made in the USA.