The Coldopen system is a device that allows water and energy savings. The opening of the knob to the right (New Ícone, Advance, Torus) or to the left (XS) is blocked so that when the mixer is opened aligned at the spout cold water will come out without activating the water heating system. When rotating the knob to the left (New Ícone, Advance, Torus) or to the right (XS) hot water will be gradually obtained.