subject: Know more about fireplace grates [print this page] The second type is expandable grates which are like traditional grates, but they can be expanded by adding additional pieces. To give better look to your home with napoleon wood burning fireplace, you may go for deck staining. The other style of the fire-place grates is self-feeding grates. In this particular type of grate, one side of the grate is taller than other side. If the taller side of the grate is facing front, then a long lasting fire will be obtained. If the shorter side faces towards opening end of fireplace, then the fire will be hotter and allow warm air to pass into the room. For proper burning of wood pieces, you must choose a best sized grate. The fire-place grates should be three inches small than the depth of the fireplace and six inch narrow than the width of the fireplace.