Exterior conduit run to fan, condensation issues
Condensation isn't as much of an issue with conduit as water intrusion, usually in buried conduit. But there is no point in running UF in conduit. THHN/THWN (they are almost always the same now) would be much easier to pull and allow you to use smaller conduit.   11' isn't much of a run, so size or difficult pulling probably isn't an issue. Still, THHN/THWN is a lot easier to work with than UF.
I doubt you'll have a condensation issue bc the pipe will be at the same temp as surrounding area. Condensation occurs when things are colder than surrounding area (like a glass of ice water).