Abatement Technologies H1990M PreFilter for the following portable air scrubbers:
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 2nd Stage filter and the HEPA filter, saving you money.
The actual size of the F1821 filter is approximately 18' x 24' x 1'.
Abatement recommended replacement schedule for the F1821 pre-filter:
High Particulate - every 8 hours
Medium Particulate - every 48 hours
Low particulate - every 72 hours or until filter light goes on
This package ships with 12 filters.