If in Doubt, Do a Little Math: Depending on the height of your mantel — or if you don’t have one, the top of the fireplace — hang the TV four to twelve inches above. If your mantel is higher than four feet, then hang the TV no more than six inches above.Click to see full answer. Thereof, how big should my TV be over my fireplace?One of the most popular questions clients pose to interior designers is how high to mount their flat-panel TVs. In general, the answer is 60-68 inches above the ground; however, this number will vary depending on the height of the homeowner. If you have to lift or strain your neck at all, it’s too high.Likewise, how big should a fireplace be? A typical 3-foot-wide fireplace opening should only be 29 inches tall. The firebox depth should be 16 inches (not including the thickness of the decorative brick that faces the fireplace). The distance from the floor of the fireplace to the bottom of the damper should be 37 inches. Similarly, can TV be bigger than fireplace? Your fireplace is too small! TV’s are taller than the most popular linear fireplaces, so they already give the impression of being top-heavy on the wall. If your TV is being mounted directly above the fireplace, make sure your fireplace is a little wider than your TV.Is it safe to mount TV over fireplace?It’s not advisable to mount a TV above a fireplace because excess heat and electronics don’t mix. The area above the fireplace is often warmer than other wall surfaces in your home. Consider this: A gas fireplace can generate 20,000 to 35,000 British thermal units (BTUs) of heat per hour.

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