attic fan speed control


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Old 01-28-21, 01:38 PM
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attic fan speed control

Hi All, We have a ceiling (not gable) mount attic fan in our hallway. It has a switch for off / on....and a switch for either low or high speed. All works very well except that the speed is still too fast, even on low. What kind of speed control would I look for at the local Lowes or Home Depot stores?
Thanks.
 
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Old 01-28-21, 02:55 PM
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Is it belt driven? Change the pulley size.
 
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Old 01-28-21, 03:19 PM
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I agree.
That would be a centrifugal start motor and doesn't respond well to electronic speed control.
 
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Old 01-29-21, 07:28 AM
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Thank you for the response. The unit IS NOT belt driven. It is direct drive.
 
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Old 01-29-21, 10:15 AM
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A smaller blade will slow the air flow. AC motors are not easily speed controlled.
 
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Old 01-29-21, 01:15 PM
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I do appreciate all the suggestions & opinions, but without trying to sound argumentitive (sp) I must admit that this leaves much confusion. Research suggest that there are several different types of speed controls that one can purchase for fans, as mentioned our present fan in question has a 2 speed control on it now. The attic fan at our old home had a variable speed control switch + timer that worked perfectly for the 20+ years that we lived there. With that said i will try and adjust my question so as to make it more directed at the type of switches available. Does anyone know why the switches offered for speed control may be problematic? And what may be the pitfalls using switches of these types? I can appreciate the ideas of changing pulleys and blade sizes, but not being a young man anymore climbing up in the attic and going through that process doesn't sound real appealing.....LOL. Anyway, as mentioned, thanks for all the input and i'm still open for any suggestions.
 
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Old 01-29-21, 06:39 PM
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Here is my reply to a recent thread:

There are a few decent fan speed controllers.
Dayton and FanTech are two. The links below are for the 6A and 10A Dayton models.
I would think the 6A should be large enough.
Will they work for sure.... no way of knowing until you try one.

Dayton 48C172 fan speed controller
Dayton 48C173 fan speed controller
 
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Old 01-31-21, 08:15 AM
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THANK YOU !!!.....I will definitely look into them.
 
 

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