The definition of an individual HVAC unit is one that is designed to provide heating, ventilation, and air conditioning (HVAC) to a single room or area. This type of unit is typically installed in residential or commercial buildings and can be used to control the temperature and air quality in a specific area. An individual HVAC unit is a great option for those who want to maintain a comfortable temperature and air quality in a specific area without having to install a central HVAC system. This type of unit is also more energy efficient than a central system, as it only uses energy to heat or cool the specific area that it is installed in. Additionally, individual HVAC units are relatively easy to install and maintain, making them a great choice for those who want to maintain a comfortable temperature and air quality in their home or business.