Nominal Size: 20x30x1. Actual Size of Filter: 19.5" x 29.5" x 0.75" MERV 8 rating. Each air filter lasts UP TO 3 months! Caliber construction features an electrostatically charged, pleated media that traps airborne particles such as dust, pollen and lint without impacting air flow. Replacement air filter furnace, air conditioner, heat pump, or HVAC system. Attracts particulates like dust to a TV screen.
