Heres what I did I went and got a 120mm computer fan and found an old portable cd player charger. Its for all intransitive purposes an AC-DC converter. I found one that matched the output volts as my fan of 12.5 volts. Then I cut the charger end off and left the wall outlet part then just wired red to red and black to balck plugged it and and poof incubator fan. Its been running for well over 120 days now nonstop with out an issue