Aerostar 20x20x4 MERV 11 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog & Smoke

Aerostar 20x20x4 MERV 11 Pleated Air Filters (Actual Size: 19 1/2" x 19 1/2" x 3 3/4") - 6 Pack. MERV 11 filters are comparable to MPR 1000-1200 and FPR 7. Designed for superior filtration efficiency, these filters are made with electrostatically charged synthetic material that draws and captures allergens between 0.3 - 1.0 microns, including lint, dust mites, spores, pollen, pet dander, fine dust, and smoke. Aerostar filters are a simple and cost effective step towards a healthier home environment, free of airborne allergens and particles that can trigger various allergy and asthma symptoms. They also improve the efficiency of your HVAC unit and therefore reduce maintenance and utility costs, by removing dirt and reducing strain on the motor. For best results, change the filter every 60 to 90 days but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest. Compatible with furnaces and AC units.

• Nominal size: 20x20x4; Actual size: 19 1/2"x19 1/2"x3 3/4"; This MERV 11 filter is comparable with MPR 1000-1200 & FPR 7.
• Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, and smoke. Made with electrostatically charged synthetic material for high filtration efficiency with low air flow resistance
• Simple to install and a cost-effective step towards a healthier home environment. Replace 3"-5" filters every 3-6 months.
• 100% synthetic electrostatic media for high efficiency with low air flow resistance
• Manufactured by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive