Fantech 1SDE42GB Exhaust Fans; Blade Size: 42; Drive Type: Belt; Blade Size: 42 in; Type of Enclosure: Drip-proof; CFM: 20435; Rough Opening Width: 46 in; Rough Opening Height: 46 in; Horsepower: 1-1/2; Voltage: 115/230; Phase: Single; RPM: 535; Numb