4000R 1250 31-2283 31-1924 This 3-speed fan is also reversible. You select the fan speed (1-low, 2-medium or 3-high) and also select fan-blade direction (OUT-exhaust or IN-for air intake). Dome opens manually with hand crank knob fan is activated automatically when vent is opened approximately 2 inch. Placing the IN/OUT switch in the center (neutral) position will turn off the fan. It has a removable screen for easy cleaning and a low AMP draw (from 1.86 to 3) insures power savings for full-time use. CSA/UL Certified. This will fit standard vent openings. Polycarbonate dome has a Lifetime guarantee. Dimensions: (Overall) 16-1/2 inch x 16-1/2inch x 4-1/2 inch D. 1 per package.
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