... Safe & Stable Features of the Electrostatic Kitchen Ventilation Canopy: 1. Unique style structure, incorporating extraction functions ... maintenance and cleaning. 6. Electrostatic Kitchen Ventilation Canopy can use in large canteens,restaurants, hotels, ... shopping centers, etc. 7. Electrostatic Kitchen Ventilation Canopy. Patented cylindrical honeycomb electric fields and optional PLC controlled ...