The one-burner GEN-1 Propane CO2 Generator can be fitted with up to three additional burners and features dual-stage pilot safety valves, which confirm the presence of the pilot flame before allowing gas to flow to the main burners. Also standard for each generator, a tip-over shut-down switch shuts off the main burners if the unit tilts or falls.
Also, conversion kits can be used to change a natural gas burner over to liquid propane or a liquid propane burner over to natural gas. Suitable for small- to medium-sized gardens, the GEN-1 Generator produces 3-13 cu ft of CO2 per hour. For larger areas, there's the GEN-2 Generator, which produces 16-26 cu ft of CO2 per hour.