Core Features
- Automatic Opening and Closing: The louvers hang naturally under gravity, remaining normally closed. When the fan starts and positive pressure forms in the duct, the louvers automatically open to supply air. After the fan stops, the louvers automatically close to prevent backflow.
- Powerless Design: Requires no electric actuator or power supply; opening and closing are achieved entirely by airflow pressure and gravity. The structure is simple and highly reliable.
- Fireproof Function: Some models can be equipped with fire dampers to meet fire ventilation requirements. In case of fire, the dampers automatically close to prevent smoke spread.
Applicable Scenarios
- Fire Scenarios: Positive pressure ventilation systems in building stairwells, lobbies, refuge floors, etc., serving as a key component for fire smoke extraction and ventilation.
- General Scenarios: Basements, warehouses, and other ventilation areas requiring prevention of odor and insect backflow, or unattended ventilation systems.
Core Values
- Safe and Reliable: The powerless design avoids the risk of electrical failures, resulting in a long service life and extremely low maintenance costs. Energy efficient: Automatically closes when shutting down to prevent cold/hot air leakage and reduce air conditioning energy consumption.
- Fire protection compatible: Can be linked with fire protection systems to meet building fire safety regulations and ensure personnel safety.
