Kevin, you asked about ceiling fans; I just installed ours. It's from Global Products, from Amazon. Go to Amazon and search for RV Fans.
This one is a 42" bi-directional multispeed unit with a remote. About $130.
Works really well, and draws only one amp at 12VDC. (I gave not verified that, though).
Tom & Jan ---- Westwing43 (RVM28)
2008 NEWMAR MOUNTAIN AIRE 4528
Pulling a 2014 CHEVY CAPTIVA