They run perfectly on 9 volts. You either need to wire in a 9 volt mains adapter or use batteries.

I also used to use PC fans, but i gave up with them.
LIP Reviewed by LIP on . How to use computer fans? Ok me and a friend are going to try and set up a lowryder stealth grow in a pc case we have every thing worked out execpt the ventilation. how do i wire up a computer fan to a socket? it has a red cord and a black cord what do i do... i have a general idea but some professional help would be much appreciated lol. Also in the thread i got the idea from the guy says he had a carbonfilter hooke up to the fan any ideas how to do this? thanks for the help and here is a link to the thread (it is Rating: 5