Briefly, the present disclosure relates, in one embodiment, to a cooking apparatus. The cooking apparatus may include a plurality of chamber walls defining a chamber. The chamber includes a plurality of chamber corners, a chamber bottom end, and a chamber top end. A gas burner including a burner tube is located nearer the chamber bottom end than the chamber top end. The burner tube may include a plurality of tube runs. Each tube run includes a run length extending substantially parallel with a respective chamber wall. A majority of the run length may include a closed wall section of the burner tube. The burner tube may also include a plurality of tube bends. Each tube bend is disposed between two respective tube runs and may include a porous wall section of the burner tube.
