What can result from improperly balanced combustion air in a boiler?

Improperly balanced combustion air in a boiler can lead to increased emissions as a direct consequence of incomplete combustion of fuel. When there is either too much or too little air supplied for combustion, the fuel does not burn optimally. In cases of insufficient air, unburned hydrocarbons and carbon monoxide can be produced, leading to higher emissions of these pollutants. Conversely, excessive air can result in the production of nitrogen oxides, which are also harmful. Therefore, maintaining the correct balance of combustion air is crucial for minimizing environmental impact and ensuring compliance with emission regulations.