This house in Swan View had an upstairs bedroom which gets extremely hot in summer.  The 5kw unit was roof mounted with UV rated insulation which ensures it won't perish and cause water ingress over the years through the dektite. 

It doesn't happen often but every now and then we remove a split system that is still operating. Instead of taking it to get recycled, it was dropped off at South Metropolitan Tafe in Carlisle for students to learn from. They don't usually have these type of working systems come through so its a bonus that they get to reinstall it for teaching.