gibson carbon postfilters Size:15-1/8" x 5" x 5/16" MERV 11 means that the

MERV 11 means that the filter can stop 50% of particles larger than 1 micron and 90% of 10 microns particles

1 VOC carbon canister and Replacement O-ring/gasket

Compact & lightweight design

Filter Media - Synthetic

purchase Aprilaire

gibson carbon postfilters Size:15-1/8" x 5" x 5/16" MERV 11 means that thePackage contains one filter change. Carbon postfilters to remove odours and gases. These filters should be installed in the small track closest to the furnace, on the air outflow side of the air cleaner cabinet. The filters should be spaced evenly from the back to the front of the cabinet, with gaps between the filters. By design, the filters will not fill the entire depth of the cabinet. Lifespan: 3 6 months