Central ventilation systems drain the pollution of air, also has the deodorizing, dedusting, adjust room temperature function  The shell is made of imported aluminum zinc plate, excellent quality and the appearance of fine and  beautiful.Using the world's first...

Central ventilation systems drain the pollution of air, also has the deodorizing, dedusting, adjust room temperature function > Host using the pressure-balanced design to protect each outlet pressure balance.>Two-speed external rotor motor to host high-and low two tranches...