Converting a CO2 generator from propane to natural gas or vice-versa involves changing the pilot and burner orifices and the gas regulator. This involves a conversion kit and partial disassembly of the unit. This conversion kit is used to convert CD18NG burner toLiquid Propane. We strongly recommend that you have this service performed by the manufacturer or one of its authorized repair stations. Should you decide to undertake this modification yourself be advised that you are tampering with flammable gas connections and the manufacturer or its representatives will not be liable and warranty obligations by the manufacturer may be voided. Contact your dealer or the manufacturer at 1-800-669-2113 to arrange for conversion services.