BestAir® is dedicated to providing a clean and comfortable indoor environment for everyone. We have a complete array of high quality humidification wicks, air cleaning filters, and many other accessories, which will ensure that your indoor air quality will be the BestAir® that you and your family can breathe.This BestAir MERV 11 furnace filter has a 20x25x6 frame and traps up to 95% of airborne particles from 0.3 to 10.0 microns in size. It helps filter out pet dander, dust mite debris, most smoke and other unhealthy particles. This item includes 2 furnace air filters. You should change your furnace filter like this one, every 6-12 months.Measures 20" x 25" x 6"; Actual Size: 19 3/4" x 24 3/8" x 6"This furnace filter fits Space Gard 2200 & 2250 (201) 24″ – *includes cardboard frame*