HVAC Pleated Air Filters capture microscopic airborne dust, pollen, allergens, mold spores, pet dander, bacteria and particulates carrying bacteria, and viruses in the air. Maximize the filtration by choosing a higher MERV rated air filter. Nordic Pure MERVs 12, 13, 14, and 15 air filters, which capture up to 98.9% + of airborn particles, are best for people suffering with allergies and other breathing issues. Nordic Pure non-woven synthetic air filter media will not support the growth of mold or bacteria, keeping your home healthier.