How can I slow down my case fan?

[Bycote]

I installed the rheostat by trial and error earlier today... luckily I got it right my first try! ;^)

I've had my fan's RPM set at 4,000 for several hours now and it seems to be working like a charm. I will contact their support about it to be sure it's OK to keep it like this in the long run, so thank you very much for that tip.

 

[Zorg]

I had run some rough calculations on the wattage that the pot would consume. They are as follows:
9 volts to the fan, pot 1.8 watts
7.2V to the fan, pot 2.3 watts
6 volts to the fan, pot 2.4 watts

Understand these are rough calculations, but you can see the inverse correlation between fan speed and the wattage consumed by the pot. Also you can see how close that you come to the max rating of the pot. I would slow the fan down to as low as you want it and feel the pot to make sure it doesn't get to hot. Your probably OK.