Furnace fan re-use

Old 10-19-14, 01:20 PM
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Furnace fan re-use

Hello Electricians...

I am salvaging the squirrel fan from my old furnace. Had an updated my fuel tank and furnace (insurance protocol) and wanted to re-purpose the fan for a shop air filtration unit. I've read about constructing a clean-air box over the most used machine, and in my case it is the table saw!

My concern is the wiring and proper voltage source! (110 or 240) From close observation, the source voltage is 110v AC. I have read motor and it is 110, however, there is a transformer in the line which gives me big concern! I live in Canada where my drier is 220 and washer is 110. Has anyone else tried this and how was it wired? Voltage?

Old 10-19-14, 01:38 PM
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Here in the States the appliances work the same way. Electric dryer is 240v and the washers are 120v.

I'm not following you in regards to the transformer. This transformer is in the house ?
The blower motor is designed to run on 120vac so connect it to 120vac.
Old 10-19-14, 08:05 PM
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Are you sure that it is a transformer and not a capacitor? A transformer is commonly mounted next to the squirrel cage but not used for the motor. A picture would help.
Old 10-19-14, 08:47 PM
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There is a problem with your plan.

You can not have an open type fan motor in the dust stream from your table saw.
Besides plugging up the motor with dust there are certain conditions where there is the possibility of a dust explosion.
Old 10-20-14, 03:59 PM
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Greg, I believe he wants to make an air filter box to remove the dust from the air. Not a dust collector. The air box will have filters on one, or both, ends of the box.


I agree that your fan is likely 120 volt and should work fine.
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Old 10-20-14, 04:36 PM
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Ok, that makes sense.

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