HVAC stands for Heating, Ventilation, and Air Conditioning. It refers to a system or technology used to provide heating and cooling, as well as indoor air quality and ventilation control, in buildings and homes. HVAC systems aim to maintain a comfortable and healthy indoor environment by regulating temperature, humidity, air circulation, and air purification. These systems encompass various components and equipment, including furnaces, air conditioners, heat pumps, ductwork, thermostats, fans, filters, and more. HVAC systems are essential for maintaining comfortable and safe living and working conditions in a wide range of environments, from residential homes and commercial buildings to industrial facilities.