There is an increasing demand for flammable refrigerants for use in HVAC due to their low-global warming potential (GWP), yet they also have the potential to pose an increased hazard.

Several lower GWP refrigerants are already available in Australia, such as ammonia, carbon dioxide and hydrocarbons. Each of these natural alternatives to HFCs (hydroflourocarbons) have hazard characteristics that are different from those of the commonly used HFCs. Ammonia has high toxicity and medium flammability, carbon dioxide operates at a higher…