I have ordered one of these, the 7000 model
Maxxair - MAXXFAN Deluxe All-In-One RV Vent, Shield & Fan | Airxcel
its the fully upgraded version with the remote control and have someone coming next week to install it. I am told its a simple replacement, remove caulk, take out screens, disconnect power, remove old fan, reconnect power, screws and recaulk.
Van