There's no sense more strongly connected to mood and memory than the sense of smell-it's why aromatherapy is so effective in helping people relax and focus. Now you can enjoy the therapeutic benefits of the Cold Air Nebulizer by creating an all-natural spa-like sanctuary in your home. The Zenith is a specific type of diffuser that uses the process of nebulization to achieve evaporation it forces the breakdown of essential oils into very tiny particles.