When used as a 2nd stage filter the H2002 pleated filter removes finer particulates than the 1st stage pre-filter. The actual size of the H2002 air filter is approximately 24 x 24 x 2.
Manufacturer recommended replacement schedule for the H2002 pleated filter:
Use filter indicator light to determine needs
High Particulate - estimate 72 hours
Medium Particulate - 3 x/ month
Low particulate - 1 x/ month or when filter light goes on
For instructions on how to change your air cleaner filter, please refer to your units Instruction Manual.