by Super User
on December 27, 2012

“How important is it to buy a new air-conditioning system that is more efficient? Does energy efficiency depend on what type of refrigerant is used? Purchasing an energy-efficient system allows a homeowner to save on energy costs and protect the environment. Even if your air conditioner is only ten years old, you may save significantly on your cooling energy costs by replacing it with a newer, more efficient model.

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