Aerostar Air Filter 20x25x4 MERV 11 AC Filter, HVAC, Furnace Filter, 2 Pack | ACTUAL SIZE (19.50 x 24.50 x 3.75) AC Filter, Furnace Filter, Dust, Pet Dander, Smoke & Allergies MERV 11 (MPR 1200 / FPR 7)

UNIVERSAL REPLACEMENT FILTER. The 20x25x4 air filter measures 19 1/2 x 24 1/2 x 3 3/4 in to seamlessly fit into most HVAC systems, air conditioners & furnaces alike. For best fit, measure your current unit to confirm compatibility

WIDE COMPATIBILITY. Comparable to MPR 1000 & FPR 7, this filter fits seamlessly into most brands systems and has a pro MERV 11 rating to filter out microscopic particles to promote clean and fresh indoor air quality

MAXIMUM PERFORMANCE. For optimal performance, change filters every 3 to 6 months but increase frequency to at least every 90 days during peak summer & winter months to keep your system running efficiently and to reduce unwanted strain

ELECTROSTATICALLY CHARGED. Our filters contain 100% synthetic electrostatic media for high efficiency with low air flow resistance, making these a cost-effective step towards promoting a healthy home environment

MADE IN USA. Manufactured by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive everyday