What can be a consequence of inadequate ventilation on a boiler system?

Inadequate ventilation in a boiler system can lead to improper combustion and an increased buildup of carbon monoxide. Combustion requires a specific amount of air to mix with the fuel being burned. When there isn't enough air due to poor ventilation, the combustion process cannot occur efficiently. This can lead to incomplete combustion, generating carbon monoxide, a hazardous gas that is a byproduct of this inefficient process.

The presence of carbon monoxide is particularly dangerous because it is colorless and odorless, making it difficult to detect without proper monitoring equipment. In a well-ventilated system, combustion is more efficient, and carbon monoxide levels are kept within safe limits, thus minimizing risks to health and safety.

The other options reflect outcomes that don't align with inadequate ventilation. Improved combustion efficiency would indicate a proper balance of air and fuel, while higher fuel consumption typically would not result solely from ventilation issues but rather from inefficiencies elsewhere in the system. Decreased water temperature does not directly relate to ventilation and instead may involve other operational factors. Understanding these relationships is crucial in maintaining safe and efficient boiler operations.