Wall Plenum, Requires Cutout Dimensions 30-7/8 in H x 24-5/8 in W, For Use With Friedrich VPAC, 30 3/8 in Height, 24 1/8 in Width, 8 to 14 in Depth, Includes 30-3/8 in H x 24-1/8 in W x 8 to 14 in D, Wall Plenum