How can high humidity levels impact furnace performance?

High humidity levels can significantly impact furnace performance primarily by leading to condensation and corrosion. When humidity is elevated, the air contains more moisture, which can result in water vapor condensing inside the furnace. This condensation can accumulate on internal components and create a wet environment conducive to corrosion over time. Corrosion can cause damage to the heat exchanger, burners, and other critical parts of the furnace, potentially leading to decreased efficiency, increased operational costs, and even hazardous conditions if not addressed.

Furthermore, excess moisture can affect the furnace's ability to effectively heat the air as the system must work harder to achieve the desired output. Maintaining a balance of humidity is essential for optimal furnace operation, as excessive moisture can compromise the longevity and functionality of the system.