A backdraft damper enables the stream in a single way and will not alter the direction or reduce the movement. In the meantime, the balancing damper takes advantage of rotating shutters to control airflow and speed. Go away a Reply Comprehending the varied sorts of HVAC dampers as well as https://shanexpeuh.verybigblog.com/35732366/examine-this-report-on-air-control-dampers-for-engine-sheds