Backdraft dampers: Mounted to permit 1-way airflow, these kinds include shafts on just one conclude of every blade to stop air from flowing again in the other direction. If necessary, a counterbalance can support. They are generally put in from the ductwork of your respective process and will be guide https://aircontroldampersforengin90112.smblogsites.com/36577768/the-best-side-of-air-control-dampers-for-hot-climates