Which component helps to regulate humidity in HVAC systems?

The component that plays a crucial role in regulating humidity in HVAC systems is the humidistat. A humidistat is specifically designed to monitor and control the moisture levels in the air, functioning similarly to a thermostat but focusing on humidity rather than temperature. When the humidity levels exceed or drop below a set point, the humidistat can signal the HVAC system to activate dehumidification or humidification processes as needed, thus maintaining the desired humidity level for comfort and efficiency.

In contrast, while heat exchangers transfer heat and dampers control airflow, neither is designed specifically for managing humidity. A thermostat, on the other hand, regulates temperature rather than humidity, making it less suitable for this particular function. The humidistat is essential for creating a balanced indoor environment, preventing problems such as mold growth or discomfort caused by excessive humidity.