Hi, I am going to be enclosing the 2 horse straight load trailer that I have. The windows that I am enclosing look the same as the picture below (I DO NOT OWN THE PICTURED TRAILER). I am wondering what the best way would be to enclose it with plexi-glass but still be able to open the windows and have air circulation (especially the summer). If anyone has any ideas or knows where I could look for pictures please let me know :)