Depending on the final, finished look you’re after, a mantel usually adds a touch of class to a fireplace installation. There are no specific mantels for electric fireplaces, or gas models or wood burning equipment. A mantel is a mantel! The difference between the three types of fireplaces are the required clearances for its installation. Wood-burning fireplaces will require the most clearance, gas next and clearances for electric fireplaces are quite liberal or not required at all!
Buy a mantel that you like the looks of, one that is proportionally correct given the size of the fireplace. A mantel will enhance the finished look of the fireplace and any decorations or options you may have.