Check the yellow EnergyGuide label: This label helps you determine how much energy it takes to operate the model, compare the energy use of similar models, and estimate annual operating costs.
Think carefully about the size: While a larger model will obviously hold more clothes, it will also use more energy. On the other hand, a model that’s too small will require a lot more clothes washing. Energy Star qualified models are also available in stackable and under-the-counter designs, which fit in smaller spaces.
Choose a dryer with a moisture sensor: While Energy Star does not label dryers, you can reduce your dryer’s energy use by choosing a model with a moisture sensor. This feature automatically shuts off the machine when clothes are dry, which saves energy and reduces wear and tear on your clothes caused by over-drying.
Choose a model with a high Modified Energy Factor and a low Water Factor: Modified Energy Factor is a measure of energy efficiency that considers the energy used by the washer, the energy used to heat the water and the energy used to run the dryer. The higher the MEF, the more energy efficient the clothes washer. Water Factor measures water efficiency in gallons of water consumed per cubic foot of capacity. The lower the WF, the more water efficient the clothes washer.