The definition of air handling unit from ANSI/AHRI Common 430-2009 states that it is “A manufacturing unit-produced encased assembly consisting of the admirer or enthusiasts and also other necessary products to complete one or more of your functions of circulating, cleansing, heating, cooling, humidifying, dehumidifying and mixing of air….” Variants https://paxtonflpuz.pages10.com/air-handling-units-ahus-things-to-know-before-you-buy-67332434