The Abatement Technologies, Inc. air filter model H101 is the 20 x 25 x 1 original equipment manufacturer or OEM replacement 1st stage throw-away MERV 4 pre-filter for all models of Abatement Technologies CAP100 whole house Central Air Purification systems. The 1st stage filter removes coarse particles from your HVAC system. The actual size of the H101 air filter is approximately 19 5/8" x 24 1/8" x 1".
The manufacturer recommends you change the H101 1st stage filter every 1 to 3 months under normal operating conditions. For instructions on how to change your air cleaner's filter, please refer to your units Instruction Manual.