Autopilot CO2 Generator, 8 Burner - NG 22,136 BTU 21.6 Cu. Ft./Hr.Elevated atmospheric CO2 levels show remarkable increases in plant growth productivity, and creating these elevated levels in your grow room is simply the easiest way to accelerate plant growth. Autopilot CO2 generators provide and maintain the carbon dioxide levels needed to meet maximum growing potential, and operate for only pennies a day. These highly reliable CO2 generators feature powder coated steel enclosures that resist moisture, rust and