What's the proper way to ventilate?
Recessed niches have become increasingly popular for flat-panel TV installations, because they frame and ventilate the unit. To create such a niche, cut into the drywall, then re-frame it with 2x4 boards to create a 6x8-inch recessed area. A TV can be mounted flush with the wall, retaining ample space for ventilation. This method works especially well above fireplaces because it shields the TV from the heat of an active fire. Another option is to install your TV on a slide-out system, which allows easy access to the back of the panel for cleaning, dusting or reconfiguring of components.