A backdraft damper lets the circulation in a single course and won't alter the course or reduce the circulation. In the meantime, the balancing damper utilizes rotating shutters to control airflow and velocity. Leave a Reply Even so, just one downside of selecting this kind of damper in HVAC is https://emilianoqixnb.buyoutblog.com/36586766/air-control-dampers-for-engine-sheds-fundamentals-explained