Stove, flame port structure disposed in a stove and method of making flame port structure

A flame port structure for burning a gas, comprising:

• a first continuous spiral strip having a first side edge, a second side edge and a first plurality of annular segments;
• and
• a second continuous spiral strip having a third side edge, a fourth side edge and a second plurality of annular segments, wherein:
• each of the first plurality of annular segments and each of the second plurality of annular segments respectively have two first longitudinal opposite surfaces and two second longitudinal opposite surfaces;
• a first outflow passage has a first defining wall formed on each of the first respective longitudinal surfaces from the first side edge to the second side edge;
• a second outflow passage has a second defining wall formed on each of the second respective longitudinal surfaces from the third side edge to the fourth side edge;
• and
• the first and second outflow passages are structured so that the gas produces a specific combustion.