"AC Fan" Some users complained that some vibration phenomenon occurs after the roof fan is installed, this is mainly because there is no strictly enforced in accordance with the standard installation, the installation must be higher than the roof base, keeping the flat surface to prevent leaking hand phenomenon, before the installation must be pre-burying anchor bolts. Padded 5mm layer of rubber between the fan base and the base plate, which can effectively reduce the vibration, anchor bolts should be fitted with spring washers to prevent loosening when using roof fan steel bracket must be fixed in concrete foundation, all the roof fan and motor assembly are mounted on a single piece of steel frame, vibration to steel frame mounted on top of the base pad damping pad is best to use porous rubber plate. These efforts can help us reduce vibration phenomenon fan used in the installation, in these details, the most important thing is to install the fan balance, so that the fan is always in a stable installation environment, it is effective to install a fan base.