It s always convenient to have an extra filter for your Whynter Air Conditioner. 3M Antimicrobial High Air Flow Air Filter is designed to remove particles such as dust pet hair and dander. This enhanced air filtration system is especially important in maintaining particle-free air around mission critical equipment. An antimicrobial agent helps inhibit the growth of mold and mildew with micro-structured electrostatically charged filtration media that trap and retain particles. For use with Whynter Portable Air Conditioners ARC-14S and ARC-14SH (sold separately). Dimensions: 15 x 8 x 1