[mtlakejim]

Hey guys. We are camping in the southern heat so this is a major issue for us. There are two, what appear to be the return air vents on either side of the front AC. When I remove the grills it appears to be something like corplast that makes what I think is return air ducts about a foot wide and inch tall??? Is that correct and is that what y’all are sticking the pvc pipe in to prop it open?? Considering the layout do you put crossbars in to keep pvc properly oriented?