Nominal Size: 20 x 25 x 5 H, Actual Size: 19 7/8 x 24 7/8 x 4 3/8 (19.88 x 24.88 x 4.38) Measure your air filter for the exact size and compare it to our actual size to ensure proper fit. Replaces Honeywell 20x25x4 and filters with an MPR rating with an actual depth of 4 3/8 and ideal for customers with health problems or for commercial units Nordic Pure MERV 14 is equivalent to MPR 2800 Made in the USA