Weinsberg CaraOne (not only) 390QD air suply deflector

Last winter I didn't empty all the conduits in my Weinsberg Caravan as I came home from vacation. It was very freezing outside so I decided to empty all the conduits to prevent damages. As I did this, I noticed that the conduits in the back, under the seats, were still frozen after about an hour of heating. This was due to the air suply that is needed for ventilation. It is built in the bottom of the caravan, directly beneath the conducts and the pipes for the heating. So all the cold air from o