The Polar Controller eliminates the need for CO2, dry ice, or separate fog machines. This refrigerated system can create an incredible 7000 cfm of thick, white, dry, low-ground fog after a short 8 minute warm-up. Just add Cold Tubes and fluid. Cold tubes are now included with the Polar Controller, resulting in a lower, colder fog. With DMX 1 channel fog control on board, it's a breeze to operate. Wheels included. No CO2 required.