Best Seller | Air Handler Cartridge Air Filter 24x24x12 MERV 14 5W921 Cartridge Air Filter Style - Air Filters Box Performance Rating MERV 14 Nominal Filter Size 24x24x12 Filter Efficiency - Air Filters 95 Percent Media Material Microfiber Frame or Header Material Steel Air Filter Header Type Single Header Gasket... more | | $218.48 FREE shipping go to store |