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What Makes Energy-Efficient Appliances More Efficient?

Much has been said about the benefits of purchasing energy-efficient appliances and their ability to help you save money and reduce your environmental footprint. Less is known, however, about the years of research and development that have gone into making these appliances more energy efficient. The resulting features enable today's high-efficiency models to use less energy while achieving the level of performance that you expect.

Clothes washers

Energy-efficient washing machines use sensors to control water temperature. Front-load washers reduce water consumption. Some washers spray clothes with high-pressure rinses to remove soap residue, rather than soaking them in a full tub of rinse water. Others incorporate a smaller secondary spin-wash tub just for delicate clothes.

As a result of these improvements, energy-efficient models use up to 50 percent less water than conventional units and 30 percent less energy. The improved washer design results in less wear and tear on clothes, helping them last longer.

Refrigerators

The essential parts of a refrigerator include a compressor, heat exchanger coils and an expansion valve. Your refrigerator stays cold through a repeating cycle of condensing and vaporizing a fluorinated refrigerant.

Energy-efficient models use advanced design features such as more efficient inverter linear compressors, improved heat transfer surfaces and more precise temperature and defrost mechanisms. They also have better insulation, which allows the compressor to run less often, saving energy and keeping kitchens cooler.

Dishwashers

High-performance dishwashers save energy by using improved technology for the main wash cycle and by using less hot water to clean dishes. A major design improvement is the use of more efficient motors, which increases dryer efficiency by 20 percent.

Many newer dishwashers feature computer-controlled wash cycles that adjust the wash duration for the quantity of dirty dishes, or the extent to which the rinse water is soiled as determined by chemical or optical sensors. This can save water and energy on partial or lightly soiled loads. Some models employ filters to keep the water cleaner during the wash cycle, reducing the need to introduce and heat more water.

Buying energy-efficient appliances

When you're shopping for new appliances, look for the yellow EnergyGuide label, which will give you estimates of annual energy use and cost. And purchase products that are ENERGY STARĀ® rated. ENERGY STAR appliances are more efficient than standard models.

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