VD-20Z4T3

The grille design of VD series has been improved to suit for various premises. The grilles are enlarged in size and the spring device is enhanced in strength and shape, so that the grilles can be fixed firmly and closely to the ceiling. 

Delay timer series models allows the device to continue to ventilate for another 10 minutes after being switched off, fully getting rid of bad odor and truly providing you fresh air and hygiene ambience. 

The ribs have been attached to the sides of the main unit, allowing the unit to be easiy attached to lightweight steel frame from within by means of screws. 

Dual shutters move more smoothly, reducing deterioration with use.