AC Furnace Air Filter 24x24x4 MERV 8 is made of MERV 8 synthetic media (comparable with MPR 600 & FPR 5), which protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow. High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models. Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs. It is compatible for your furnace, air conditioner, or HVAC system. It is simple to install and a cost-effective step towards a healthier home environment.