The first thing is to decide is.
Gas fireplace mantel height.
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.
The thing is the mantel height is not going to change that much in room with a higher ceiling either.
The bottom of the mantel can be no closer than six inches from the firebox opening.
The highest i have ever seen is 59 but most fireplace mantels range between 52 57 for an eight foot ceiling.
The average height for a fireplace mantle varies by personal preference as well as locality.
If you put a tv above that mantel it will be too high for comfortable viewing in the average size room.
In addition if the side panels of your mantel project more than 1 1 2 inches from the fireplace facing you will need additional clearance equal to this projection.
The national fire protection association the nfpa sets standards regarding placement of a mantel in relation to the fire box local building codes.
Parts of the mantel assembly located along the sides of the fireplace opening which project more than 1 1 2 inches 38mm from the face of the fireplace shall have additional clearance equal to the projection extension beyond 1 1 2 inches.
2016 nfpa 211 11 2 5 4 clearance.
First of all yes 63 tall for a fireplace mantel in a room with an eight foot ceiling is a little high.
All combustible mantel surrounds and shelves must be kept at least 12 inches from the opening of your fireplace top and sides.
With a modern linear fireplace the trick is to keep it up far enough to keep it from looking like a fishtank on the floor but not so high to make make it hard to see.
Mantel height is not an arbitrary decision.
2114 3 masonry built fireplaces 4114 3 10 all combustible mantels and similar trim shall be kept at least 6 inches from the fireplace opening.
In addition the national fire protection association proposes codes relating the width of the mantel to its distance from the fireplace.
Again proper height is relatively subjective to your fireplace but average or standard fireplace mantel height construction is around 54 above the hearth s floor.
If the calculated minimum distance is less than six inches 15 24 cm six inches must be used.
The proper height of a fireplace mantel depends on the height of the hearth the size of the fireplace s fire box and the requirements of the local building codes.
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.
Minimum distance between bottom of mantel and top of firebox in inches mantel projection from wall in inches 0 125.