An additional roof vent with a fantastic fan or even the Hengs vent fan can really help a lot. With the vent fan on high, it pushes a lot of air out of the trailer and you can choose where to have the breeze in the trailer by changing which window (or windows) to open a bit.
I put a Hengs variable speed fan in the bathroom roof vent (at the rear of my trailer) and if I crack open a window in the front of the trailer, a nice breeze is set up from front to back. Change the fan speed to change the breeze.
I put a second roof vent with maxair adjustable speed fan in the middle of the trailer. Turn both fans on high exhaust and you get some serious air moving through. If the windows are all closed with both fans on high exhaust, it creates a bit of a vacuum and makes the outside door hard to open. Crack a window open a bit and you get the wind whistling through the screen.
Ed
