Combine with the specially designed automatic shutter to get optimum efficiency and performance
Precision balanced 14 in metal blade for maximum air flow - minimum sound level
22 ga galvanized steel housing with ribs for added strength
Built-in thermostat for automatic ventilation
Thermally protected permanently lubricated shaded pole motor
Installation accessories are model 445 aluminum roof vent, model 446 and 447 aluminum eave vent
Accessories (purchase separately) model 433 automatic shutter - counter balanced aluminum vanes open and close as fan starts and stops, better air flow than stationary attic louvers, extruded aluminum construction fits flush with outside wall
For controlling use model 69V (ivory)/69W (white) single function control, model 68V (ivory)/68W (white) two function control, model 72V (ivory)/72W (white) 6 A electronic variable speed control
14 in Dia propeller
Shaded pole motor
900 cfm with model 433 shutter or 760 cfm standard HVI wood louver