Hello all.. I have a bit of experience burning wood and i am by no means an expert. I bought this big house with 2 wood burning fireplaces. One in basement and the other on mainfloor. Im told this is a heatlator. I want to remove the fireplace and I'm not sure if the brick has to be removed. Does anyone have an idea of how this comes out? thanks so much in advance! What is the point of the box on top of the actual firebox?