No. Heating, ventilation and air conditioning (HVAC) is decidedly not the same as plumbing, which deals with delivery of potable water into and waste water and effluent away from a building or home, among other tasks. There is some overlapping of skills and equipment.

AC stands for air conditioning, which is the process of cooling and dehumidifying the air in a room or building. An HVAC system, on the other hand, stands for heating, ventilation, and air conditioning. It combines the AC with other systems to provide a more comprehensive climate control solution.

All-air systems fall into two general categories - constant volume and variable air volume (VAV). Constant air volume systems accomplish cooling and heating by varying the supply air temperature and keeping the air volume constant. VAV systems keep the air temperature constant and vary the air supply volume.

The HVAC systems are an integral setup of three processes - heat addition, heat extraction, and conditioning. Certainly, HVAC systems are installed almost everywhere including homes, industrial locations, food processing stations, organic warehouses, marine systems, and so on.