Latest 19++ Fireplace Insert Dimensions
Latest 19++ Fireplace Insert Dimensions. When comparing the dimensions of the fireplace to those of the insert, they don't have to be an exact match. Fireplace design & dimensions sides of fireplace must pinch in towards back back wall of fireplace must be straight up for first 12 inches there are two aspects of fireplace design you should be concerned about. The dimensions mentioned above are to be used as a guide for research and basic sizing.