Terminal boxes are the critical component of the VAV systems. The minimum airflow of terminal boxes is a key factor for comfort, indoor air quality (IAQ) and energy cost. If the minimum airflow is higher than required, terminal boxes will have significantly more simultaneous heating and cooling, and AHUS will consume more fan power. Buildings will have IAQ problems if the minimum airflow is less than required. A building simulation was conducted to evaluate the impact of energy consumption on the minimum airflow of single duct VAV terminal boxes. The results show that simulation data revealed that compared with the existing set point, the improved optimal minimum airflow set point exhibited an annua: energy savings of 29%.
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