Which HVAC system component helps to control the temperature and humidity inside a building?

The correct response encompasses all listed components—chiller, thermostat, and air handler—as they each play a significant role in regulating temperature and humidity within a building.

A chiller is responsible for cooling the water that is circulated through the HVAC system. It effectively removes heat from the building which, in turn, reduces the indoor temperature. In many cases, chillers are used in larger commercial systems, and their role in balancing the building's thermal environment is crucial for maintaining comfort levels.

A thermostat serves as the system’s control point. It monitors the temperature of the indoor environment and sends signals to the HVAC system to adjust operations—either by turning heating or cooling units on or off depending on the current temperature set by the user. Many thermostats also have humidity sensing capabilities, allowing them to work in conjunction with humidifiers or dehumidifiers, thus also influencing the humidity levels inside the building.

The air handler is integral to the distribution of conditioned air throughout the space. It usually works in coordination with heating, cooling, and ventilation components to manage airflow and maintain both temperature and humidity levels. The air handler may include filters and other mechanisms to further enhance air quality, ensuring a comfortable and healthy indoor environment.

Therefore, to effectively manage and control both temperature and