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Clothes Washers - Buying GuideClick to toggle navigation breadcrumbs.
Clothes Washers: Buyer’s Guide
Today’s washers are built with many options for saving water and energy. When comparing models, there are three standard metrics to pay particular attention to: the EnergyGuide label, Modified Energy Factor (MEF) and Water Factor (WF).
Look for the Label: EnergyGuide
Most major appliances, electronics, and lighting must meet specific energy standards outlined by the U.S. Department of Energy. Energy use and efficiency are displayed on the yellow EnergyGuide label, which compares the estimated annual operating cost with similar models and states how much energy the appliance is expected to use annually. The EnergyGuide label will also display the ENERGY STAR® logo, if the particular model qualifies.
This example of an EnergyGuide label shows the annual cost of running the appliance compared to other similar models. The amount is based on the national average rate for electricity. Look for models with the lowest operating costs.
Look for the Logo: ENERGY STAR®
ENERGY STAR® Washer Standards:
- Minimum Modified Energy Factor (MEF) of 2.0 or higher
- Maximum Water Factor (WF) of 6.0 or lower
- Check a machine’s efficiency before you buy as there are models that are 2 to 4 times as efficient as those that meet the minimum ENERGY STAR® standards1
Modified Energy Factor (MEF):
A washer’s Modified Energy Factor is way to measure efficiency based on how much energy a machine uses along with its tub size and how much water it leaves in clothes after a wash. A more efficient machine will have a higher MEF. The highest MEF of ENERGY STAR®-rated products is 3.4. You can find the complete Qualified Product List at energystar.gov.
Low Water Factor (WF):
A washer’s WF is the number of gallons used per each cubic foot of laundry. The lowest WF of ENERGY STAR®-rated products is 2.5.
Other Efficiency Features:
These machines are generally much more efficient than top-loading washers—they use 30% to 60% less water and 50% to 70% less energy.2 Thanks to gravity, front-loading machines can fill partially and have the clothes pass through the water as the drum spins while top-loading machines must be completely filled with water in order to operate properly.
New machines have controls that either sense load size and adjust water levels, or have various wash and rinse cycles.
Faster Spin Cycle:
Spinning moisture out of your clothes is significantly more energy efficient than heating air to dry your clothes in the dryer. As such, improved spin speeds on new machines allow you to either air-dry your clothes or use the dryer less, which not only save energy but will also serve to promote the longevity of your clothes.
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1Goorskey, Sarah, Wang, K., Smith, A. (2004). Rocky Mountain Institute’s Home Energy Briefs #6 Cleaning Appliances. Snowmass, CO: Rocky Mountain Institute. Retrieved October 2, 2012, from http://www.rmi.org/rmi/pid217. (p. 1).
2Goorskey, Sarah, Wang, K., Smith, A. (2004). Rocky Mountain Institute’s Home Energy Briefs #6 Cleaning Appliances. Snowmass, CO: Rocky Mountain Institute. Retrieved October 2, 2012 from http://www.rmi.org/rmi/pid217. (p. 2).
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