The 1.5 multiplication factor in the above calculations was specifically proposed for A2L refrigerants to account for the lower flammability characteristics of the A2L refrigerants compared to the A2 class. This proposed 1.5 factor is being discussed in the working groups and may be revised upward to 2 or even 3 depending on new data being made available on A2L refrigerants as well as the risk analysis on the use conditions of these refrigerants being conducted by various organizations worldwide.