I am getting ready to add an air conditioner in the BR of our 5er. I want to stay with Dometic since that's what is in the living area. I wanted to use the Dometic Penguin 13.5K to keep the height as low as possible, but an RV tech told me that he does not like the Penguin, saying everything is too packed in, not allowing good air circulation. He doesn't think they are as reliable as the Dometic Brisk Air. There is about 3" difference in the height of the two units. My RV is already 12'2" high, so the Brisk Air would put me at about 13'3". I have heard that the minimum overpass clearance for main roads in the US is 13'6". That puts me uncomfortaby close! Have any of you had experience with the Dometic Penguin?