The PopUP™ revolutionizes air filtration with a design that self-assembles to drastically reduce installation time and the messiness of replacement, while maintaining a highly efficient MERV 11 air-filtration rating. When maintenance is required, just remove, collapse and dispose of the entire filter - no more seperate parts (pleat combs, inner frames) needed!

Dimensions: (in.) 20 in. x 25 in. Efficiency: Standard Efficiency ratings are based on American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard 52.2-1999.;Efficiency ranges are defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large particles, E3=3.0 to 10.0 microns. Minimum Efficiency Reporting Value: MERV 11 Used With: F100F1004, F100B1008, F150E1000, F100F2028