One of the things I mentioned—and this is a very significant undertaking—is that here in North America, we are transitioning to a new refrigerant gas. We are currently using hydrofluorocarbons, or HFCs. HFCs happen to be a pretty potent greenhouse gas. Their global warming potential is thousands of times more than CO2. We are going to be transitioning to a new technology. These refrigerants will be hydrocarbons: propane, isobutane. One of the things you will see when we transition to these new refrigerants is a slight bump in energy efficiency. That just has to do with the thermodynamics of being able to compress and expand that gas.
