Our anti-allergenic Merv 12 pleated HVAC filters significantly reduce dust in home and reduce dust mites, mold spores, pet dander, pollen, smoke particles, and other airborne particulates by up to 97.8%. We'll not only improve your indoor air quality, but you may be able to have less dust in your home and your indoor allergies may not be as bad. Our filter material has a permanent electrostatic charge and does not support the growth of bacteria, fungi, mildew or mold.