Aerostar 20x25x4 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack

Aerostar 20x25x4 MERV 8 Pleated Air Filters (Actual Size: 19 1/2" x 24 1/2" x 3 3/4") - 6 Pack. 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. Made with electrostatically charged synthetic material . these MERV 8 (comparable to MPR 600 and FPR 5) filters draw and capture allergens between 3 - 10 microns . including lint . dust mites . spores . and pollen. Aerostar air filters also improve the efficiency of your HVAC unit by removing dirt and reducing strain on the motor . reducing utility and maintenance costs. For best results . replace 3"-5" filters every 3-6 months but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest. Compatible with furnace and air conditioner units . and easy to install.