Yes, some may have concerns with R-290 being flammable, however, it is regulated and strictly limited by the government and worldwide agencies. Don’t let the flammability scare you. Remember, the refrigerant charges in the U.S. are quite small and it is always important, when working on a refrigerated case with R-290 or any type of refrigerant, to hire a certified refrigeration technician, to hire a certified refrigeration technician, assuring proper safety and care are taken when dealing with an R-290 system. It doesn’t matter where you are in the world, HFC refrigerants are fading out and natural refrigerants are here to stay. Be kind to the environment and make the smart choice.