got to fit new steamer in kitchen extention on tuesday.Boundary fence is about 1to 1.2 m away.Adjacent property building is about 4.5 m away with no opening windows or doors.The area is of good wealth and i was a bit dubious to point the flue faceing next door.Builders answer to the problem was "ive was talking to the neighbour the other day and hes an old fella who can hardly see , so we should be o.k "