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

Open the box and check whether all parts of the fan are complete, whether there are bruises on the outside of the casing, especially pay attention to whether the head rectifier is bruised and deformed. Read More

The centrifugal fan is based on the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy (pressure). Read More