The importance of an Air Handler for your HVAC System will amaze you. It is like having a hamster running inside a hair dryer. Okay, not really. A hair dryer and Air Handler handle air and the temperature of the air.
Think of a hair dryer, when you turn it on, the hair dryer blows cool or hot air depending on the setting you have it set at to get your hair dry. An Air Handler is basically the same thing, only on a larger scale. Oh a hair dryer usually does not have any duct work attached to it. An Air Handler however, is attached to duct work in which the air flow travels within your home or office. Without an Air Handler to help allow air flow throughout all of the rooms your HVAC System would not operate correctly. When the HVAC System (heating, ventilating, and air-conditioning) is turned on it will run to reach the desired temperature, once the temperature is reached the Air Handler will kick on distributing air flow throughout all the duct work.
A HVAC System contains numerous components; an Air Handler, or also referred to as an Air Handling Unit (AHU) is just one piece of the puzzle. One piece does not make a complete puzzle; an Air Handler contains valuable components for sequence to work suitably. A blower or fan that sort of has the same concept of a hamster wheel, the wheel spins around the amount of air being transported through the Air Handler depends on the speed of the blower, without the hamster. Filters, of course are used to help provide you clean air to travel throughout the duct work ventilation. Duct work ventilation is sealed so there is no air escaping and adequate air supply is continuous throughout the system. A heating or cooling component is also essential, without all these an Air Handler on your HVAC System would never be able to provide you with heat or cool air. The internal components of the Air Handler allow the magic to take place to provide you with your comfort.