A vertical HVAC system is a type of air conditioning and heating system that is designed to move air up and down instead of side-to-side. It is an efficient way to provide air comfort in a space and is ideal for tall buildings or other places where space is at a premium. The components of a vertical HVAC system include a condenser unit, evaporator coil, air handler, and ductwork. The condenser unit is located outside the building and is responsible for releasing the heated or cooled air into the space. The evaporator coil is then used to draw in the outside air and cool or heat it depending on the setting of the system. The air handler is responsible for distributing the air across the space, while the ductwork is used to control the air flow. As such, the definition of a vertical HVAC system can be summarized as a type of air conditioning and heating system designed to move air up and down instead of side-to-side.