The small window fan I have is easy to set up. But I only use it when the coach has been closed up for a while and is very hot and stuffy. My two Fantastic fans plus the window fan quickly pull the heat out. Then the roof acs can do the rest much faster after the really hot air is gone. Or if the outside ambient temp has dropped nicely I will just run the Fantastic fans on low with a couple windows open and enjoy the fresh air. I'm a light sleeper and the roof airs are a bit too noisy for me so at night I only run the ac located in the front of the coach. Fans vs ac totally depends on what states or climates I'm in. For example, up in Maine I rarely run the ac's at all and we often use a small electric heater at night even in the middle of summer. Night time temps in the 50's are typical right on the coast where we stay. Traveling thru states like Florida and Georgia the ac's get a workout day or night.