We have an island in our family room 12' wide. The right 1/3 is a vertical cavity for a putting in an entertainment assembly, we once fit a 40" projection TV fully into the cavity and it filled it. The cavity/shelf is elevated 3' with a base to it and empty storage underneath of about 1.5'.

The left 2/3 has an elevated fireplace built into it with a gap underneath for storage of about 1.5'. The chimney goes straight up above the fireplace meaning the island has a chimney above the left half.

We want to get rid of the projection TV and use a large flatscreen, 50-60". The right hand "cavity" only allows up to 42", plus the cavity would be mostly empty, resulting in an ugly entertainment area. We would like to drop the fireplace to the floor, eliminating the lower storage, and move it to the center of the island, then mount a flatscreen TV above it portrait-style.

Moving the fireplace down 3' and over 2' is probably no big thing, and we would make the cavity on the right disappear, but my problem is with the chimney. I REALLY don't want to add remodeling the chimney/roofline into the project. Can the upper chimney be left where it is angling slightly down to the right to new fireplace? How much angle is allowed? Safe?

Also, are there any known concerns with mounting flatscreen TVs above fireplace inserts?

Jerry

So this must be a prefab like a Majestic or Heatilator. Dropping 3' and over two would require two 45 degree chimney angles and the only one that can tell you if you can do that is the fireplace manufacturer. If you can he sells you the 45s and describes it in his install manual. If he does make or sell 45s of talk about them in my manual then I think you are sunk.