The definition of air handling unit from ANSI/AHRI Standard 430-2009 states that it's “A manufacturing facility-produced encased assembly consisting of the supporter or supporters together with other needed tools to perform a number of in the functions of circulating, cleansing, heating, cooling, humidifying, dehumidifying and mixing of air….” Mechanical Engineering https://stephenbyslc.buyoutblog.com/34464660/air-handling-units-ahus-no-further-a-mystery