Aerostar 20X25X1 Merv 8 Air Filter is a high-quality product designed to provide you with a comfortable and healthy indoor environment. Made from premium synthetic materials, this 6-pack of air filters is perfect for use with furnaces and air conditioners. The filters are designed to capture airborne particles, including allergens, dust, lint, mold, and pet dander, ensuring that the air you breathe is clean and fresh. With a minimum efficiency reporting value of 8.0, Aerostar 20X25X1 Merv 8 Air Filter is an excellent choice for those looking for a reliable and effective air filter. The filters are easy to install and are designed to last, providing you with long-lasting protection against airborne particles. This pack includes six filters, making it an ideal choice for use in homes, offices, and other commercial settings. Nominal size: 20x25x1; Actual size 19 3/4"x 24 3/4" x 3/4"; This MERV 8 filter is comparable with MPR 600 FPR 5. Designed to filter microscopic particles such as lint, dust mites, spores, and pollen Simple to install and a cost-effective step towards a healthier home environment. For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter months 100% synthetic electrostatic media for high efficiency with low air flow resistance