The QuietCool QC CL-6000 RF is a direct drive whole house fan rated at 5,665 CFM, designed to cool your entire home by pulling fresh outside air through windows and exhausting hot attic air. Unit dimensions are 26"W x 40"D x 40"H. Includes an RF wireless wall switch, automatic shutter, and installation instructions. In like-new, in-box condition with no damage or missing parts. Ideal for energy-efficient home cooling as an alternative to air conditioning.