A mechanical air handling system is a type of HVAC system that is used to control the temperature, humidity, and air quality of a space. It is comprised of several components, including a fan, filter, heat exchanger, and air ducts. The fan is used to move air through the system, while the filter removes contaminants from the air. The heat exchanger is used to heat or cool the air, and the air ducts are used to distribute the air throughout the space. Mechanical air handling systems are used in a variety of applications, such as residential homes, commercial buildings, and industrial facilities. They are designed to provide a comfortable and healthy environment, while also being energy efficient. In addition, they are easy to maintain and can be customized to meet the specific needs of the space.