I have done a lot of hot weather camping. Unfortunately my fantastic fan is a little use. Let me explain with an example of a couple of days ago. The camper cooked all day and everything inside warmed to about 90 degrees. By 10 at night the outside temps had finally dropped to about 80 degrees. Windows open and fantastic fan on high did virtually nothing. It would have taken hours or a bigger drop in outside temperature to make any difference. So I ran the A/C for close to an hour. By then inside and outside temps were in the high 70s. I went to sleep with windows open and a small fan pointed at me. That same or a similar scenario has happened a great many times. Once the camper and contents heats up, the fantastic fan does virtually nothing unless there is a big drop in the outside temperature.