Controlling Exhaust Fan


Old 08-20-01, 06:17 AM
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I'm using an attic exhaust fan as a shop exhaust fan. It's a 120 volt, 3.1 amp motor. Can I use a 600 watt dimmer switch to control the fan speed?
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Old 08-20-01, 09:11 AM
Join Date: Sep 2000
Location: United States
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Probably not. The dimmer can handle it, but I don't think the motor will last long with reduced voltages.
Old 08-21-01, 10:59 AM
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How else can motor speed be controlled? Doesn't the speed control on a ceiling fan just reduce the voltage via a rheostat?
Old 08-21-01, 11:20 AM
Gary Tait
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No, it adjusts phase cutoff. Some motors don't like to be controlled that way. My advice would be to get a variable
speed or multi speed motor, and a proper speed controller
for that type of motor.

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