When absolutely rotated/engaged, airflow is blocked fully; when disengaged/open, air can stream unimpeded through the entire system. If a zone damper is installed in the ductwork, it's going to open or shut based on the temperature in that zone. For example, if the temperature in a single spot on the https://air-control-dampers-for-h12233.creacionblog.com/36344386/air-control-dampers-for-hot-climates-secrets