What is the approximate dew point of water vapor in combustion gases?

The dew point of water vapor in combustion gases typically falls within the range of about 130°F (54°C). This temperature is critical because it represents the point at which water vapor begins to condense into liquid water. In combustion processes, especially those involving fossil fuels, the combustion gases contain water vapor as a byproduct.

When the temperature of these gases, which can be quite high immediately after combustion, drops to the dew point, the moisture present will start to condense. This condensation can lead to various issues, such as corrosion of flue systems, inefficiency in heat transfer, and potential water damage if not managed properly.

Understanding the dew point is essential for gas technicians, as it helps in designing systems that minimize condensation and its detrimental effects on equipment and efficiency. The other temperature options, while related to dew points in various contexts, do not accurately reflect the typical dew point of water vapor in combustion gases.