What is one of the primary reasons for tuning a boiler?

Tuning a boiler is essential primarily to optimize combustion, which directly impacts the boiler's efficiency. When a boiler is properly tuned, the air-to-fuel ratio is adjusted to ensure that combustion occurs as completely as possible. This adjustment minimizes unburned fuel and improves energy output while reducing emissions.

By ensuring optimal combustion, the boiler operates more efficiently, meaning it uses less fuel to produce the same amount of energy, leading to cost savings and environmental benefits. Regular tuning is important for maintaining this optimal state, as factors such as changes in fuel quality or system wear can affect the combustion process over time.

The other options do not align with the main purpose of tuning a boiler. For instance, reducing the frequency of inspections is not a direct benefit of tuning and does not contribute to the operational efficiency of the boiler. Altering the boiler's structure is a major overhaul and not something achieved through tuning. Lastly, increasing fuel consumption would be counterproductive, as the aim of tuning is to enhance efficiency, not to use more fuel.