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DuluthMedic

12 Volt fan question

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I'd like to run 3 12 volt computer fans in my ice house. There called "muffin fans." I'd like to slow or control the speed of the fan. They are just too loud. I was told I needed a rheostat to slow the speed of the fan. I was also told to try an old switch from a car dashboard heater. They will all be hooked up to a boat battery. Any ideas?...I know I'm not the only one with these fans. Please help!

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Maybe you can just try a standard dimmer switch from the hardware store. Like the one in the dining room.

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You'd need the switch, resistor, and harness from the car.

The dimmer switch would be easier.

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What I have used is the dimmer switch for the dash lights in a car. These will work for any low amperage device.

Although I never thought of using a light dimmer switch for a house, but being I am a mechanic I had car parts readilly available for cheap or free!

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You could use the 120mm fans. newegg has an assortment, many of which have a db rating of 25 or less--whisper quiet. They run at lower RPM but move a lot of air.

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Thanks guys..i'v got 3 fans already they are .8. I will try a truck/car dimmer. I'll let ya know how that works.

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If that does not work here is link to a rheostat from radio shack

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Picked up the rheostat, and the watts are to small...she got hot! Anyway I'm going with computer fan speed controllers. Duh! Why didn't I think of that!

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