What type of fan is used to push air through coils?

A forced fan is designed specifically to move air through coils by creating pressure that pushes air onto the surfaces of the coils. This action is vital in heating, ventilation, and air conditioning (HVAC) systems where efficient heat exchange is necessary. In applications such as air conditioning, these fans ensure that air is effectively circulated over the cooling coils, maximizing the heat transfer process and enhancing the overall efficiency of the system.

Other types of fans, such as induced fans, function differently and are typically used to remove air from a space rather than push it through coils. They create a vacuum that draws air from the area rather than pushing air through a system. The options of tube in tube and plate and frame refer to specific types of heat exchangers rather than types of fans, further clarifying why a forced fan is the appropriate choice for moving air through coils effectively.