I'm drawing up a plan for our builder to build a false chimney breast (i.e, no fire, just for show) with an "inset" for the 435XDE. We want the screen to be flush with the chimney breast, hence the inset. All cables are being buried. I know I need some breathing space around the panel, but how much? The operating instructions don't really say anything specific (thanks Alan A, it was still handy though). I was thinking a 2-inch border all the way round. Anyone any ideas?