QC Manufacturing QuietCool RM ES-2200FLT QuietCool Fan - Roof Mount w/ 16" duct collar Motor Voltage: 120 VAC, 60Hz Power Consumption: 197 Watts Air Flow @0.1" SP: 2245 CFM CFM/Watt: 11.4 Sound Level in Room: 49 db Roof Rough Opening: 16 1/4" x 16 1/4" Ceiling Rough Opening: 14 1/4" x 18 1/4" Intake Grill Outside Dimension: 16" x 20" Intake Grill Color: White