QuietCool QC CL-6400 Classic - Positive Energy Conservation Products
The Quietcool QC CL-6400 Classic Whole House fan is a two speed fan for larger dwellings. Two speeds Low 3,226 CFM to High 6,306 CFM Grill size is 16 X 38 Inches Attic Venting Required is 8.5 Square Foot. Recommended Double Stack Switch, and 8 Hour Timer