The definition of air handling unit from ANSI/AHRI Common 430-2009 states that it's “A manufacturing unit-created encased assembly consisting of the fan or followers as well as other required machines to perform one or more in the functions of circulating, cleansing, heating, cooling, humidifying, dehumidifying and mixing of air….” The https://paxtonflpuz.pages10.com/air-handling-units-ahus-things-to-know-before-you-buy-67332434