Aerostar 19 7/8 x 21 1/2 x 1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 19 7/8\x21 1/2\x3/4\)
- Nominal Size: 16 x 25 x 4, Actual Size: 15 1/2 x 24 1/2 x 3 5/8 (15.5 x 24.5 x 3.63).
- Measure your air filter for the exact size and compare it to our actual size to ensure proper fit..
- If you are replacing a Honeywell or Lennox 16x25x4 or an air filter with an MPR rating with an actual depth of 4 3/8, please see our 16x25x5 (4 3/8 actual depth).
- Nordic Pure MERV 12 is equivalent to MPR 1500-1900.