HVAC (Heating, Ventilation, and Air Conditioning) utility is a term used to describe the system of heating, cooling, and ventilation in a building. It is a combination of different components that work together to maintain the indoor temperature and air quality. The system is designed to provide comfort to occupants and reduce energy costs. HVAC utility includes a variety of components such as air conditioners, furnaces, heat pumps, and air handlers. These components are connected to a central control system, which is responsible for controlling the temperature and air quality. The system also includes air filters, humidifiers, and dehumidifiers, which help to maintain the desired indoor environment. HVAC utility is an important part of any building and should be regularly inspected and maintained to ensure optimal performance.