The first perform of HVAC dampers is to control the airflow inside your process. This can be critical for a number of motives. Backdraft dampers are both gravity or motorized. Gravity backdraft dampers use the pressure of gravity to close the damper when there is no air move. Motorized backdraft https://air-control-dampers-for-h01223.ziblogs.com/36866421/5-easy-facts-about-air-control-dampers-for-engine-sheds-described