The AprilAire 813 Media Air Filter is a high-quality MERV 13 filter designed to improve indoor air quality. With an electrostatic filtration technology, this filter can capture contaminants such as dust, dust mites, bacteria, pollen, and mold. It has a filter life of 12 months and is compatible with universal smart home systems. This air purifier filter is portable and measures 20 x 25 x 4 inches, making it suitable for various heating, cooling, and air systems in your home.