What is often the result of too high a stack temperature?

When the stack temperature is too high, it typically indicates that the combustion gases are exiting the boiler at elevated temperatures, which can mean that the system is not operating efficiently. Higher stack temperatures suggest that a significant amount of heat is being lost rather than being utilized for steam production or heating purposes. This inefficiency leads to higher operational costs due to the increased fuel consumption required to maintain the desired performance levels.

Furthermore, when a system is running at high stack temperatures, you may also experience issues such as equipment wear and tear, and in some cases, it can lead to damage to the boiler or other components. Therefore, while other responses may seem plausible, higher operational costs as a consequence of excessive stack temperatures accurately reflects the negative implications of this inefficiency.