Is a fan necessary?

[Tubbster85]

I have a 7 something cubic ft freezer that I'm using as a keezer. I don't have a collar on it, I have 2 kegs and the CO2 tank in there along with bottled beer. I've seen others that have fans in them which I'm guessing is to keep condensation at bay? I haven't had any condensation yet.

 

[b-boy]

If you have a collar or a tower I think you need a fan. Otherwise, no.