Abatement Technologies H1990M Pre Filter for the H1990M air scrubber.

The FiberTrap pre-filter is designed to capture the coarsest particles circulating through your air duct system, which helps to extend the life of the optional Pleated or carbon-pleated filter, the second-stage filter, and the HEPA filter, saving you money!

Maintenance & Care: Abatement recommended replacement schedule for the pre-filter:

• High Particulate - every 8 hours
• Medium Particulate - every 48 hours
• Low particulate - every 72 hours or until the filter light goes on 

Filter Dimensions: 18" x 24" x 1"

This package ships with 12 filters.