ShokWaveRider
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Assume you're talking about me, since I think I'm the only one who made such a comment. Sorry you think I was chastising you, but if you do you misread my post. I said what I had heard about it, with two supporting sources that seemed decent. I then asked if there were reliable sources that said there weren't heat issues with a TV to be mounted over the fireplace, for my own information. I'd like to know whether that's a possibility in case I want it later. With the information I have, I wouldn't do it. You can do what you want with your TV.
Ha Ha, I was kinda joking, did you not notice the smiles and LOL in my comment..... No malice intended or received. To answer your question. Heat is not an issue, or least it never has been for us.
Firstly, you must keep the TV about 2 - 4" forward of the Fireplace Flue. The alcove should not of course be leaning against it, I have an airspace there. The Flue is double skinned, in the attic it just has a plywood support that actually touches it, which was up to code for when the house was build. So it would not present and issue there.
Secondly, manufacturer's do recommend a 10cm or so airspace around the TV. Yes I violate this one as I like a more "Built in" look. I could see a potential issue with a Plasma TV that runs very hot, but not for a LCD, QLED or an OLED. Our last LCD was in there 12 Years with no issues at all, this new TV does not get warm at all. I do check regularly just in case, but I am sure that novelty will soon wear off, I repeat, it does not get warm at all. I am more concerned about Burn In at the moment, because of my watching habits, but folk have begun to assure me that may be somewhat unfounded.