What is the exact depth of the filter box?

The Trion Air Bear Supreme 1400 cabinet is 7-1/8" deep. Overall it measures 24-7/8" wide x 16-1/4" high x 7-1/8" deep, with a 22-1/2" x 13-7/8" duct opening, and it holds a 5" deep x 16" x 24-1/4" media filter. If you have any questions about fitting it to your system, please give us a call. We'd be happy to help.