Standard Mantel Height
If you are keeping your wood or gas fireplace then you may want to consider placing the tv off to one side and not above the mantel.
Standard mantel height. As a general rule a mantel is placed about 12 inches above the fireplace opening. Marble mantel specification chart mantel dimension diagram these are exact reproductions of authentic antique mantels and as such the dimensions on our cast marble mantels are fixed. If the fireplace has facing around the opening the mantel can also extend 3 or more inches beyond that. We can however add length to the bottom of most of the marble mantels to make the opening and overall height taller.
Add an inch to the distance for every inch that the mantel protrudes. If your fireplace mantel is tall with a height of more than four feet ground up mount the screen no more than six inches higher than the fireplace. A mantel should extend a minimum of 3 inches beyond the firebox opening. So a mantel 6 inches deep would be attached.
Do not guess when sizing the mantel to a room or the mantel could wind up being too long or too short. A 6 inch depth must have a minimum height clearance of 15 inches. An 8 inch depth must have a minimum height clearance of 17 inches. The thing is the mantel height is not going to change that much in room with a higher ceiling either.
The highest i have ever seen is 59 but most fireplace mantels range between 52 57 for an eight foot ceiling. A 4 inch depth must have a minimum height clearance of 13 inches. Your fireplace may fit this dimension or it might be on the shorter or taller end of the spectrum when it comes to mantel height above fireplace. As such there is some flexibility with personal preference when it comes to the height of your mantle the average height ranges between 50 and 60 inches because as a general rule mantles are never lower than 50 inches but they can be above 60 depending on what look and feel you are going for in your house.
If you put a tv above that mantel it will be too high for comfortable viewing in the average size room. Measure the length height and width of the firebox and facing. The mantel above a traditional wood burning or gas fireplace is typically 48 or more off the floor.