The burner is one of the most important parts of a boiler. It is the place where air mixes with fuel and provides the combustion required to heat the water in the boiler. A burner is a part of a combustion system that produces energy using various types of fuel and releases this energy in the form of heat. Heat input is provided to the boiler by the combustion of the heat source. This combustion begins by diluting the fuel pumped to the burner with a spray nozzle and igniting it.