The definition of air handling unit from ANSI/AHRI Normal 430-2009 states that it is “A manufacturing unit-manufactured encased assembly consisting of the enthusiast or supporters as well as other essential equipment to conduct one or more of the capabilities of circulating, cleaning, heating, cooling, humidifying, dehumidifying and mixing of air….” https://boilerrental04714.blogsumer.com/32579720/top-guidelines-of-air-handling-units-ahus