What is a common cause of flue gas condensation?

A common cause of flue gas condensation is low combustion temperature. This phenomenon occurs when the exhaust gases produced during combustion cool down to the point where they can no longer hold all the moisture in vapor form. As the gas cools, water vapor condenses into liquid water, which can lead to various issues, such as corrosion of the flue pipe and reduced efficiency of the heating system.

In systems where the combustion temperature is insufficient, the gases released may contain a higher amount of water vapor, and as they move through cooler sections of the vent system, the conditions become favorable for condensation to occur. This illustrates the importance of maintaining optimal combustion temperatures to ensure efficient operation and longevity of heating equipment.

While fuel moisture content and burner adjustment can impact combustion efficiency, and excessive air supply can also influence performance, it is primarily low combustion temperature that directly leads to flue gas condensation.