in my last van i had a webasto which went wrong , so i put in a Morco , very similar to the Carver . found it got the van warm in the same amount of time, then turned it down to pilot which kept us nice and cosy . totally silent too . fixed the webasto and flogged it with no regrets . main problem with them is they need a hole in the floor about 250x125mm for the balanced flue ,and they're quite large . the advantage of the Propex is you can get it in very small spaces and no messing with the diesel tank