Removes dust, pollen, molds, tobacco smoke, grease, soot, bacteria, animal dander, airborne dust mites, and other particle contaminants..Five Seasons filter part #MU1625Nominal size 16" x 25" x 5" (Actual size 15 3/8" x 25 1/2" x 5 1/4")Filters out 97% of airborne particles.