13.5x29.5x.75 actual size (14 x 30 x 1 nominal size). This 14x30x1 air filter is an extended surface pleated filter, which outpaces standard air filters with medium efficiency, and are engineered for decreased pressure drop, and long service life, which reduces HVAC equipment maintenance and energy costs. The 14x30x1 air filter is graded to ASHRAE test standards 52.2, which assures that the air filter will capture dust as good or better than OEM 14x30x1 air filters. Pleated design. MERV classified to ASHRAE classifications. 860 cfm flow rate.