What is the primary factor affecting boiler efficiency?

The primary factor affecting boiler efficiency is the combustion process and fuel type. This is crucial because the quality of combustion directly influences how much energy is produced from the fuel. Proper combustion maximizes energy output while minimizing waste products such as unburned fuel and pollutants. Different fuels have varying characteristics, including energy content and combustion properties, which impact how effectively a boiler can convert fuel into usable heat.

The combustion process determines the efficiency of heat transfer, the completeness of fuel burning, and the creation of byproducts like carbon monoxide. Therefore, selecting the right fuel and ensuring optimal combustion conditions are essential for achieving high boiler efficiency.

While other factors like boiler size, age, and insulation can influence performance and operational aspects, the combustion process and fuel type fundamentally drive the energy production capability of the boiler system.