A fireplace hood made as a massive solid structure defining the top of the firebox of the fireplace. The solid structure absorbs, stores the heat and radiates it when the fireplace is not in use. The massive structure is preferably made monolithic of a poured refractory material with internal hot gas flues open to a surface of the structure and in communication with the firebox for receiving hot gases. The hot gas flues open to a hot gas accumulator in communication with a tubular member for connection to the fireplace chimney. The fireplace has a convection tube system in its walls for heating cold air from the room in which the fireplace is disposed.
