What happens to fuel use when combustion air is not properly balanced?

When combustion air is not properly balanced, it leads to an inefficient combustion process. Proper air balance is crucial for optimal fuel combustion; if there is too little air (fuel-rich condition), the fuel does not burn completely, resulting in unburned fuel, wasted energy, and increased emissions. Conversely, if there is too much air (fuel-lean condition), it may lead to wasted energy as excess air dilutes the flame and can cool the combustion process. In both cases, the overall efficiency of fuel use decreases, leading to more fuel being consumed for the same output. Therefore, when combustion air is improperly balanced, the result is that fuel use becomes inefficient, increasing operational costs and contributing to environmental pollution.