Any one come across it were a builder has built a house and were the position they want the boiler the flue points out to a boundary. No surface there. But less than 600mm away from the boundary line between 2 properties. I am correct in saying this is not acceptable? Its mainly for nuisance and the possibility for the neighbour extending there property out or installing a height fence. Just want to make sure I am right because another gas engineer has ok'd the proposed position of the boiler. Thanks for your insight.