priestlake, Please clarify what you mean by "getting moisture". Are you talking about within the panes? Or on the inside pane in the interior of the coach? Around the frame on the inside?
We have dual pane windows but I think the coldest temperatures we have been in range in the low to mid teens. We had only 2 windows with moisture and they were the bedroom slide out windows and then only overnight. Once we got out of bed, wiped off the moisture around the lower frame and glass, it didn't reappear until we spent the night in bed again. I don't recall ever having moisture on any other windows. I don't think they repair them, I think they replace them if a problem should arise.