Active Air Pre-Filter for ACCF3912, 12" x 39" spl_cg must be received before your

must be received before your order ships

then blended and ground to a 14 mesh size

while also keeping you safe from particulates

The fluid motion is vortex-like which can be naturally aspirated

Active Air Pre-Filter for ACCF3912, 12" x 39" spl_cg must be received before yourDescription Active Air Pre filter: Extend the effective life of your Active Air carbon filter with a corresponding Active Air pre filter. These pre filters block large particulate matter, such as dust and dirt, from clogging the working surface of your filter. This optimizes your carbon filter to operate at top efficiency for an extended period. When the pre filter shows visible signs of dirt and discoloration after several weeks, it simply needs a