A damper is a machine used to measure the airtightness of a building. It can also be used to measure airflow between building areas, test the airtightness of ductwork, and help physically locate air leaks within the building envelope. [1]A blower door consists of three main components: (1) a calibra Read More

The wear of the axial flow fan will cause the fan to vibrate, shorten the life of the fan, and in severe cases, the fan will not work properly. In particular, the wear of the fan blades is particularly serious, which not only destroys the flow characteristics in the fan. Read More