HVAC stands for Heating, Ventilation, and Air Conditioning. In simple terms, HVAC is a system that is used to control the temperature, humidity, and air quality of a space. It does this by using a combination of heating, cooling, ventilation, and air filtration systems. The goal of HVAC is to provide a comfortable and healthy environment for occupants. It is used in both residential and commercial buildings, and is an important part of any building’s energy efficiency.