Energy efficient choices can save families about a third on their energy bill with similar savings of greenhouse gas emissions, without sacrificing features, style or comfort. ENERGY STAR is a government-backed program helping individuals protect the environment through superior energy efficiency and to help them make the energy efficient choice.The Energy Star marked products meet strict energy efficiency guidelines set by the EPA and US Department of Energy. Products that have been marked Energy Star are worth the cost of replacement of older products because of how much money they will save you in the long run. These products will run most efficiently and even quieter than older models which are not Energy Star. The minimum Seer made today is 14 seer and it is also Energy Star.