Hi, we have just bitten the bullet and ordered 2 sets of the smoothline ventilators for our colourbond Dune roof. We have a 2 storey home with insulation, but unfortunately no siselation/sarking ... and boy it gets hot up there.
I will update this post when we have installed them to report on their functionality.
Does anyone else have them installed? What are your thoughts? The concept sounds very logical.