The Montreal Protocol, an international treaty designed to protect the ozone layer, has created a phasedown schedule for hydrofluorocarbons (HFCs) to reduce their environmental impacts. In response to this phasedown, the HVAC industry has sought more environmentally friendly refrigerants with lower ozone depletion. R454B Refrigerant has emerged as an alternative to R410A because it meets these criteria and is included in the list of acceptable alternatives under the SNAP (Significant New Alternatives Policy) program administered by the US Environmental Protection Agency (EPA).