Can I slow down fan motor in 208/240v box garage heater?

Old 03-08-15, 06:57 PM
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Can I slow down fan motor in 208/240v box garage heater?

I have 2 of them. One is a Marley and the other is a ProForce.

They both are about 14 x 14 inch red box heaters that use a 6-30 plug.

The fan blows too hard and the heat is not very hot. Could I slow down the fan with a dimmer switch of some kind or could I do it some other way?

Old 03-08-15, 07:28 PM
Tolyn Ironhand's Avatar
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Using a dimmer on a motor is a sure fire way to burn it up.

The type of speed control that can be used will depend on the type of motor it is. This could be a simple as a solid state speed control to a VFD. I have used Solid state speed controls on even larger exhaust fans that work well.
Old 03-08-15, 07:32 PM
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A big problem with slowing down the fans in electric heaters is that the heating elements can overheat.

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