Sorry, we no longer sell the H051 filter individually.

The H051 filter is still available in the following Annual Filter Packs:

PAK50 – For the CAP50-U Central Air Purification System
PAK50-UV – For the CAP50-UV Central Air Purification System
PAK50-UVP – For the CAP50-UVP Central Air Purification System

The H051 is the replacement 1st stage, 16" x 25" x 1" throw-away, pre-filter for all models of Abatement Technologies, Inc.’s CAP50 Central Air Purification system. The 1st stage filter removes coarse particles from your HVAC system.

The manufacturer recommends you change the 1st stage filter every 1 to 3 months under normal operating conditions.