A HVAC system is a type of mechanical system that is used to regulate the temperature, humidity, and air quality in a commercial building. It stands for Heating, Ventilation, and Air Conditioning, and it is designed to provide a comfortable environment for the occupants of the building. The system works by circulating air through the building, using a combination of heating, cooling, and ventilation. The heating component warms the air, while the cooling component cools it. The ventilation component removes stale air and brings in fresh air from outside. The air is then filtered to remove any pollutants or allergens. A HVAC system is essential for any commercial building, as it helps to keep the occupants comfortable and healthy.