Blueprint Controllers CO2 Generator LP,NG, CGNG-8In store Location: J6 Blueprint Controllers CO2 Generator LP, The Blueprint Controllers CO2 Generator LP, CGLP 8 features eight preinstalled brass burners that generate 21. 2 cubic feet per hour of CO2 using liquid propane. The generator includes plugs to reduce the number of active burners, making it easy to reduce the CO2 and heat output to suit a smaller growing space. The generator features electronic ignition and dual solenoid valves, which