Bath Ceiling Fan Question


Old 05-04-08, 04:24 PM
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Bath Ceiling Fan Question

I have this 1.1A exhaust fan I removed from a bathroom ceiling. I can use it for another project if it weren't so loud. Is there some easy way I can slow it down to half speed?
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Old 05-04-08, 05:03 PM
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a simple rheostat connected in series should slow it down.

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Old 05-04-08, 05:20 PM
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AC motor speeds are controlled by the line frequency. It is not likely this motor can be slowed without overheating it.
Old 05-04-08, 06:50 PM
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Noise owes mainly to tight clearance between blades and housing, which increases fan efficiency. Some extraneous plastic and sheet metal parts may be resonating too. Try just the fan & motor "free air" and I'll bet it'll whisper.

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