Features:

• Nominal size: 20x25x1; Actual size 19 3/4 inchx 24 3/4 inch x 3/4 inch; This MERV 11 filter is comparable with MPR 1000-1200 & FPR 7.
• Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, and smoke
• 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
• Aerostar filters are manufactured by Filtration Group, a world-leading manufacturer and supplier of filtration solutions for residential, commercial and industrial applications.