Fireplace Inserts fit into existing masonry or factory built wood burning fireplaces. They are designed to fit inside the fireplace and offer an excellent solution for drafty, older fire places. Better quality inserts will include the fan system to move heat from behind the insert into the room. Once the installation is complete the massive heat loss up the old chimney will be sealed off, saving you energy dollars; and greatly reducing drafts in your home. You can create warmth and ambiance at the touch of a finger.