What is one negative effect of excess moisture on HVAC systems?

Excess moisture in HVAC systems can significantly contribute to mold growth. When humidity levels are too high, it creates an environment conducive to mold spores, as they thrive in damp conditions. Mold can develop on the cooling coils, ductwork, and insulation, which not only compromises air quality but can also lead to health issues for building occupants. Additionally, mold can cause operational issues within the HVAC system itself, potentially leading to increased maintenance costs and a decrease in overall system efficiency.

In contrast, increased refrigerant pressure is a function of many factors, not solely moisture, and enhanced system efficiency and decreased electrical consumption are typically associated with proper moisture control rather than excess moisture. Therefore, understanding the implications of excess moisture highlights the importance of maintaining appropriate humidity levels in HVAC environments to prevent mold growth and its associated negative consequences.