Champion Cooler #N55/65S 6500CFM SideDuct Cooler 6500 CFM Cabinet dimensions: 42-7/16" x 39" x 39" Duct opening: 19-3/4" x 19-3/4" x 9-5/8" 4200/4700 cfm (based on motor horse power) Cools 1400-1800 square feet