The Advance Advenger has the Evergreen control system - a green, ultralow detergent mode that is ideal for normal cleaning and can be adjusted for more aggressive cleaning on dirtier floors. Advenger with Evergreen dispenses detergent at 400:1 just enough detergent to enhance the natural cleaning power of water and break surface tension while leaving a lighter detergent scent behind. Its not only green, its smart. Youll save at least 50 percent in detergent costs by using a more highly diluted solution. Operators also have the option to clean with water-only for even more control over your environmental stewardship.