HVAC stands for Heating, Ventilation, and Air Conditioning. It refers to the technology and systems used to provide indoor comfort and maintain acceptable indoor air quality in buildings and vehicles. HVAC systems are designed to control the temperature, humidity, and air circulation within a space, creating a comfortable and healthy environment for occupants. HVAC systems are essential for residential, commercial, and industrial buildings as they play a crucial role in providing comfort, promoting health, and preserving the integrity of the building structure.