This top-quality furnace filter has a MERV rating of 13, ensuring that your indoor air is clean and healthy. Perfect for use in your home or office, this filter is available in a convenient pack of two and measures 20x25x4. Designed for use in furnaces, this pleated filter is a must-have for anyone who wants to ensure that their indoor air quality is top-notch. Its superior construction means that it will last , making it a smart investment for the health and comfort of you and your family.