member GentleEnglishman, Caravanner four green stars [Online] Posted 12 July 2012 by GentleEnglishman Quote | Report Three vans ago we had a Compass Rallye van with a Truma Electric/gas blown air heating system. It was very efficient and the electric system heated the van up with energy to spare. We then moved on to a Compass Magnum 544 also with a similar blown air system but this struggled to achieve a comfortable temperature and the trunking system hardly provided any heat at all. I know that this was a larger van but not that much larger! This year we swapped the Compass for a new Swift Challenger Sport, again with a Truma blown air heating system but this is similar to the Compass in poor efficiency. I know that switching to gas does produce the required temperatures but why doen't it on the electric side? Matters are not helped by Swift putting the heating controls in such a position that you cannot read them! However, I have tried every different combination I can think of including the recommended ones but still no joy. Can anyone enlighten me further? Is there any other system that can be installed that would be more efficient? Post liked!