Indigo NXT is the most efficient cube ice machines on the market today. Many of the new models incorporate R410A refrigerant, which is environmentally friendly and has 48% less global warming potential than previous models. All models are AHRI certified, as well as, exceed the stringent 2018 DOE (Department of Energy) minimums for energy usage. Many models are ENERGY STAR® 3.0 qualified, which makes them available for rebates from local energy companies. Indigo NXT is up to 43% more energy efficient than previous models, significantly lowering the cost of ownership.