I would expect that, if you put a decent blower fan with your FP, it would help keep heat from concentrating above your FP. Also, proper insulation around the FP should be a code requirement, so heat shouldn't emanate from the FP through the framing. I would also suggest NOT putting the TV there simply from a comfort standpoint. Even with it tilted down, think about where you're eye level will be while seated, and how much your neck will be craned upward to watch. We put our flat panel TV (42" plasma) in built-in bookshelves to the side of the FP. It is mounted on the rear wall inside the shelving, so we can push it back in flush with the shelving, and pull it out (and adjust the angle, if needed) to watch. The bottom of the TV is about 39" high (36" cabinets below, with a bit of clearance between them and the TV), and the viewing angle is perfect. The other reason we like this set up is that the TV is not the focal point of the room when it isn't on. We wanted the FP and whatever we have on the mantle to be the focal point. Installing the TV this way has accomplished that goal.

QAM tuner is just another name for a digital or HD tuner. Any set you find new today will have a QAM tuner built right into it.

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