While I would never advocate breaking the law or thinking that the EPA is anything other than the best environmental protection agency in the world, it is worth noting two facts. I learned on a boat refrigeration board that many household refrigerators in Europe use propane as a refrigerant. On that same board, a military person posted in the Persian Gulf reported that all the small fishing boats used GM automotive compressors and propane as a refrigerant to ice down their fish. And of course, Canadians would have no good ideas on what refrigerants to use since they live in igloos anyway!