The TGM prefilter is unique because it has a steel frame surrounding the aluminum prefilter. The steel frame is spot welded around the aluminum prefilter, so replacing it is not easy. If your handy, we recommend replacing the aluminum prefilter with the 123324-004.
Trion TGM2 prefilter assembly. The prefilter has a galvanized steel frame spot welded around the aluminum mesh prefilter. Assembled as shown our photo. The overall dimensions are 20½ x 12½" (not including the protruding tab).
The single wide TGM2 requires a single prefilter and the double wide TGM2 requires two prefilters.
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