Open and close with a single pull. Grille with shutter operated by a cord. Equipped with a mechanism that keeps the grille open and closes it when the cord is pulled. Our new grille has a special mechanism which stops shutters in position that user need. After pulling a twine shutters moving down and flow gets closing. In case of natural wentilation there can be a situation when cold air gets into the bathroom what is uncomfortable. User can lock the flow or open for its wish. They fit into ventilation ducts:

 

* special order only