What does a Variable Air Volume (VAV) system control in HVAC systems?

A Variable Air Volume (VAV) system is specifically designed to control the airflow within a building's HVAC (Heating, Ventilation, and Air Conditioning) system. The primary function of a VAV system is to adjust the volume of conditioned air delivered to different zones or spaces as needed. This allows for precise temperature control in individual areas, accommodating varying occupancy levels and thermal demands throughout the building.

In a VAV system, dampers modulate the amount of air supplied to each zone based on the current load requirements, which can be influenced by factors such as the number of occupants, equipment operation, or external weather conditions. This targeted airflow helps maintain comfort while also improving energy efficiency, as less energy is wasted heating or cooling spaces that do not require it.

While temperature set points, water flow to radiators, and humidity levels are important aspects of overall HVAC system performance, they do not represent the primary function of a VAV system. The focus is primarily on controlling airflow, which directly impacts the distribution of temperature and comfort levels across different areas of a building.