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OT ALERT!!! How does an AC fan switch work?

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  #16  
Old 08-08-2011, 09:00 PM
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OK I'm with you now, You could use a wall mount celling fan speed control it would get you down to the speed you want. Can be picked up at a Lowe's any day of the week.
 
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Old 08-08-2011, 09:19 PM
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Thanks Richard...I will tomorrow and let you know how it works for me.
 
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Old 08-08-2011, 09:20 PM
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A standard, simple, "box fan" varies speed, while still consuming full voltage, by varying the number of "poles" (windings) used.

Since there is a physical resistance by the air being pushed, and it takes magnetic energy to rotate that motor, less magnetism will turn the fan slower against the resistance of the air.

If you lower the voltage, you get less magnetism in those windings.

Those "speed controllers" are triac devices which will effectively lower the average voltage applied, thus magnetism, thus speed.

Did I get that right? Yea, I think I did........

Pop
 
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Old 08-09-2011, 04:44 AM
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I must have a freak of a fan because when I looked at the one in my living room and there are only 2 wires going to the motor, the ones that we have in the hose have multiple wires, and you can hear the sound of the motor change when you switch speeds. This fan also has a infinite speed control on it as well......
 
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Old 08-09-2011, 02:10 PM
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Originally Posted by Deluxe06
OK I'm with you now, You could use a wall mount celling fan speed control it would get you down to the speed you want. Can be picked up at a Lowe's any day of the week.
Originally Posted by nlemerise
Thanks Richard...I will tomorrow and let you know how it works for me.
See post #7.
 
  #21  
Old 08-26-2011, 08:17 PM
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Just an update to put this topic to bed...Did the fan speed switch as described earlier (got a wall switch from HD for $12 and it works like a charm). I had to play with it a bit to get the correct speed I wanted. During the day it blows heat out so I set the original fan switch to low and the new switch to high...at night I set the original fan switch to high and the new switch to low (absolutely silent) and it blows nice cool high-desert air across our bed. Thanks to all, though I wonder if Jody could burn a chip for it ?

 
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