You can get this thing called a reostat, its for adjusting the output of heating elements for reptile cages. All it does is limit the power going to the element. Pretty sure it has a ground, if not, you can probably find one on the internet.

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ForgetClassC Reviewed by ForgetClassC on . Vortex fan too loud Hello people, I have a question for you. Anyone have any suggestions for muffling the roar of a 6" vortex fan? Mofo sounds like a jet engine! :) Thanks in advance for any help. Rating: 5