Ahu and circulating air variable air volume arrangement VAV systems supply air at a variable temperature and airflow rate from an air handling unit (AHU). Because VAV systems can meet varying heating and cooling needs of different building zones, these systems are found in many commercial buildings. the discharge-air set point should never be lower than 55oF or higher than 70oF. The set point can be a little lower than 55oF in climates with high relative humidity, however, where humidification is required. fo more details download this file.
