The cold air diffusion system is the world’s most advanced nanotechnology in the scent marketing industry, and is what helps us create the best scent machines for home and business use. It is designed to produce the best scent experience by delivering the pure essential oil as a dry mist with NO residue. The compressor inside the system converts the oil into nanoparticles by using cold air pressure. This is the healthiest process of diffusing oils into the air, while keeping the therapeutic benefits of the essential oils.