1.ABS plastic, Compact and Fashionable Design
2.The Front Shutter Helps Maintain the Indoor Energy Efficiency
3.With Solenoid Electric Valve control or thermal switch control
4.Multi-blade Application as Better conform to the Airflow Principles as Ensure High Air Movement and Low Noise Level
5.Exquisite Anti-Back draft Damper
6.Optional Wiring Outlets Make Different Installation Applicable
7.Window, Wall & Glass Mounted Applications
8.Easy to Install and Maintain