Carbon filter you use?

AAjax

Well-Known Member
Speed controllers kill your fan. It just clips the sine wave and starts and stops it repeatedly. It can cause hums and shortened fan life.

I use a variac that adjusts voltage. Smoother and quieter and easier on the van.View attachment 3762193
That is the filter from the previous pics.
I run 2 of those, one in each tent. I buy expensive fans cause they are much quieter, don't wanna ruin them with cheap controllers.
 

AAjax

Well-Known Member
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