Sorry about the size of the first picture. I hope this one is better...

That looks a lot like a PC fan...

i have that under my sink. it's a reverse osmosis system for filtering water. mine doesn't have the fan. i just use a hand held fan and wave it every so often.

It is a PC fan. The battery pack ran it for 72 hours. I'll install it this week and to see if it evens out the humidity in the Igloo-dor.

People have been talking about these lately.

It should do the trick, but 72 hours? You going to use rechargeable batteries? It may be better to run a corded DC power fan like the one shown to a small rectifier converting AC to DC. Like the little wall wart transformers for cell phone chargers? And then run the fan from that. You could calk the tiny drilled hole.