Which of the following is a primary function of an HVAC system?

Maintaining indoor air quality is a primary function of an HVAC system because it involves regulating the temperature, humidity, and ventilation within a building to create a comfortable and healthy indoor environment. Proper air quality is essential for the health and well-being of occupants, as it helps reduce the presence of pollutants, allergens, and excess moisture, which can lead to various health issues. HVAC systems use filters, ventilation strategies, and humidity control mechanisms to achieve and uphold these air quality standards, making them integral to overall building functionality and occupant comfort.

In contrast, while aspects like lighting and electrical support, automated building systems, and building security are important for comprehensive building management, they fall outside the core mandate of HVAC systems. The primary focus of HVAC is centered on climate control and air quality rather than these additional functions.