I am also a qualified refirigaration technician and do not know of any refrigeration system with inflammable gas in the system. Sweating on such a system will definately be your last job. The only danger of a refrigerator is shock. As for LPG, I have been using it for years and consider it safer and more economical financially and time-wise provided all the safety precautions are taken. I will never trade my gas hob for an electric one.