Getting Clean with Greater Efficiency
June 11, 2012 - Last month, the U.S. Department of Energy (DoE) announced a number of new efficiency standards that step up the efficiency requirements for residential dishwashers and clothes washers. Not to be confused with ENERGY STAR, which is a voluntary program; these standards are mandatory and will affect all products sold in the United States. It's projected that, as a result, consumers will save $20 billion in energy and water costs.
When the dishwasher standard goes into effect sometime in 2013, the DoE projects this new rule will save consumers 15% on energy and 20% on water. Table 1 lists the maximum energy use allowed.
Table 1. Amended Energy Conservation Standards for Residential Dishwashers
|Compliance Date: 1 year after date of publication in the annual register|
|Product Class||Maximum Annual Energy Use|
|1. Standard (≥8 place settings plus 6 serving pieces)||307 kWh/year|
|2. Compact (<8 place settings plus 6 serving pieces)||222 kWh/year|
NOTE: Annual energy use, expressed in kilowatt-hours (kWh) per year, is calculated as: the sum of the annual standby electrical energy in kWh and the product of (1) the representative average dishwasher use cycles per year and (2) the sum of machine electrical energy consumption per cycle in kWh, the total water energy consumption per cycle in kWh, and, for dishwashers having a truncated normal cycle, the drying energy consumption divided by 2 in kWh. A truncated normal cycle is defined as the normal cycle interrupted to eliminate the power-dry feature after the termination of the last rinse option.
The clothes washer standard goes into effect in 2015, with even stricter requirements becoming effective in 2018. The DoE estimates that the increased efficiency will save individual consumers around $350 during the lifetime of the appliance.
Table 2. Amended Energy Conservation Standards for Residential Clothes Washers (Compliance Starting 2015 and 2018)
|Product Class||March 7, 2015||January 1, 2018|
|Minimum IMEF||Minimum IMEF|
|1. Top-loading, Compact (less than 1.6 ft3 capacity)||0.86||1.15|
|2. Top-loading, Standard||1.29||1.57|
|3. Front-loading, Compact (less than 1.6 ft3 capacity)||1.13||N/A|
|4. Front-loading, Standard||1.84|
NOTE: IMEF (integrated modified energy factor) is calculated as the clothes container capacity in cubic feet divided by the sum, expressed in kilowatt-hours (kWh), of: (1) the total weighted per-cycle hot water energy consumption; (2) the total weighted per-cycle machine electrical energy consumption; (3) the per-cycle energy consumption for removing moisture from a test load; and (4) the per-cycle standby and off mode energy consumption.
These new standards are the culmination of a process that began two years ago. The above specifications were developed in concert with environmental organizations, consumer groups, and industry stakeholders representing companies like Whirlpool, General Electric, and LG. The standards are part of a larger effort on the part of the DoE to save upwards of $350 billion on consumer energy costs through the year 2030.
Read the dishwasher standard in its entirety:
Read the clothes washer standard in its entirety: