As we move towards decarbonizing our built environment, one glaring challenge with all-electric buildings is hidden in plain sight. The shift towards electric heating and cooling systems like heat pumps and VRF have also substantially increased refrigerant use. Over a 60-year life of a building, refrigerant leakage and disposal from mechanical systems can be as high as 20% of the building's whole life carbon emissions. Using whole life carbon project case studies, we will discuss the necessary steps to reduce environmental impacts of refrigerants. We will also showcase best practices and strategies that designers/engineers can use to incorporate zero or low GWP refrigerants in their projects. Project Drawdown identifies refrigerant management as the number one climate solution and our presentation will show the reason why.