Cleaner Filters 14x14x1 Air Filter, Pleated High Efficiency Allergy Furnace Filters for Home or Office with MERV 11 Rating (4 Pack) PREMIUM QUALITY - All Cleaner Filters are made in the U.S.A. and use sturdy frames designed to ensure maximum performance, and uniform pleats to maximize airflow and stymie the growth of mildew, bacteria, and mold - all our filters are rated to remain effective for up to 90 days BREATHE CLEAN AIR - MERV rating 11 pleated filter removes most airborne pollutants from your home including; pollen, pet dander, dust mites, mold, and fine dust particles including humidifier dust, auto emissions and lead dust so that you can breathe fresh and clean air SAVE MONEY - Allowing dust to accumulate in your air conditioning system increases the risk of the unit experiencing technical problems, according to the US Department of Energy, changing a dirty air filter will reduce an air conditioner's energy consumption by 5% - 15%! PERFECT FIT - 14x14x1 Air filter can replace any standard furnace, HVAC or air conditioning filter, includes 4 filters IMPROVE EFFICIENCY - Cleaner Filters are made of supercharged pleated material, which is up to 30 times more effective at removing allergens and particles like dust, pollen, pet dander, mold, smoke, and fungi than normal fiberglass filters