Tamarack Tti-INF1100 Infinity 1100 Ducted Whole House Fan Duct Size (2): 10 Inch, Duct Collar Length: 3" w/ Bead 115V, 60Hz, 1.5A Overall: 16-1/4"W x 16" H x 9-1/2" D Flange: 14-1/4" x 1-1/2" 1070 CFM @ .1" wg