This is Masport I3000 that we installed late last year, as you can see the brick chimney has been taken down to the top of the fireplace. This was done because the installers of the previous fire had removed too many bricks, weakening the structure.
We then installed a double cased flue system, and flashed over the hole that the brick chimney left.
You can see that we have installed a top panel on the fire fascia, this was to cover the hole that was left above the fascia, also there is a mantleshield installed to the underside of the mantle to protect it from prolonged high temperatures.