Energy efficiency standards for appliances and equipment reduce energy use in residential and commercial buildings and the associated greenhouse gas emissions. In 2011, buildings, and the appliances and equipment used inside of them, accounted for 34 percent of U.S. greenhouse gas emissions (emitted either directly from the buildings or in the generation of the electricity used in the buildings).
Laws authorizing the U.S. Department of Energy (DOE) to set appliance and equipment efficiency standards were first enacted in the 1980s and have since been expanded to new categories of equipment. DOE also is required to periodically strengthen existing standards. In setting a standard, DOE must take into consideration factors including increased cost of the product, lifetime operating cost savings, total projected energy savings, the need for national energy savings, impacts on product performance, and impacts on manufacturer competition. Altogether, the new and strengthened 2013 standards are expected to cumulatively save between $4.9 billion and $16.3 billion and prevent the emission of 300 million tons of CO2.
To learn more about how individuals can save energy and money on utility bills while reducing greenhouse gas emissions, check out C2ES's Make An Impact guides to buying and using appliances.
DOE recently set new energy efficiency standards for microwave ovens and distribution transformers:
- Microwave ovens. Microwave ovens are consumer products that use microwaves to cook or heat food. Some microwave ovens also have thermal elements that allow them to cook food much like a conventional oven. Standards for this equipment were first authorized by the National Appliance Energy Conservation Act of 1987. However, the first efficiency standards for microwaves for power consumption during operation, as well as standby mode, were released on June 17, 2013. These standards are expected to save consumers from $1.53 billion to $3.38 billion and prevent the emission of 38.11 million metric tons of CO2.
- Distribution Transformers. Distribution transformers transform the high-voltage electric current from power lines into lower-voltage electricity that can be used in homes and businesses. These transformers can be found in metal boxes on utility poles where power enters a neighborhood, at ground level on a metal slab, or underground. Standards for liquid-immersed and medium-voltage dry-type distribution transformers were first required under the Energy Policy Act of 1992, while standards for medium-voltage dry-type distribution transformers were set in the Energy Policy Act of 2005. Strengthened standards for all types were issued by DOE in a final rule on April 18, 2013. These standards are expected to save from $3.4 billion to $12.9 billion and prevent the emission of 264.7 million metric tons of CO2.
DOE is currently considering establishing or strengthening energy efficiency standards for these categories of appliances and equipment:
- Portable Air Conditioners. Portable air conditioners are units that cool air and can be moved from room to room. They are distinct from window box units or central air conditioning systems. DOE is soliciting public comments on a proposed rule to include portable air conditioners as a category of consumer appliances for which standards can be established.
- Computers. Computers are devices that include (but is not necessarily limited to) desktop computers, integrated desktop computers, laptop/notebook/netbook computers, and workstations. DOE is soliciting public comments on a proposed rule to include computers as a category of consumer appliances for which standards can be established.
- Computer servers. Computer servers provide services and manage networked resources for client devices such as desktop and laptop computers. These services and resources are accessed via a network connection. DOE is soliciting public comments on a proposed rule to include computer servers as a category of equipment for which standards can be established.
- External power supplies. External power supplies are the boxes on power cords that convert household electric current into direct current or lower-voltage alternating current in order to operate consumer products, such as computers or cell phones. Standards for this equipment were first established in the Energy Independence and Security Act of 2007.
- Commercial refrigeration equipment. Commercial refrigeration equipment is used for food storage and merchandising in the food retail industry (e.g., grocery stores, supermarkets convenience stores, specialty food stores) and the foodservice industry (e.g., restaurants and cafeterias). Standards for this type of equipment were first established in the Energy Policy Act of 2005. DOE has set a deadline of 2014 for a new final rule. Proposed regulations were released in August 2013 that, if finalized, would prevent the emission of 55 million tons of CO2 over 30 years.
- Electric motors. Electric motors convert electric energy into rotational energy and are often used for blowers, compressors, conveyors, fans, and pumps. There are three categories of electric motors, defined, among other ways, by their voltage, power, and rotation speed. Standards for this equipment were first established in the Energy Policy Act of 1992, but the Energy Independence and Security Act of 2007 significantly expanded the scope of covered motors. In November 2013, DOE issued proposed standards for electric motors that would avoid emission of 400 million metric tons by 2044. DOE expects to make a final rule in May 2014 that will go into effect in December 2015.
- Ellipsoidal diameter, bulged reflector, and small diameter reflector lamps. Ellipsoidal diameter, bulged reflector, and small diameter reflector lamps are types of incandescent reflector lamps (IRLs). IRLs are directional lamps, such as spotlights and floodlights, which can be used in residential and commercial applications, such as recessed downlighting and track lighting. They have a reflective coating on the inside of the bulb to focus and aim the light. While most IRLs were subject to efficiency standards under the Energy Policy Act of 1992, these subcategories were excluded before enactment of the Energy Independence and Security Act of 2007, and then delayed by a rider to the FY 2012 Energy and Water Appropriations bill.
- Metal halide lamp fixtures. Metal halide lamp fixtures provide lighting for parking lots and streets, flood lighting, athletic facilities, big-box stores, and warehouses. Standards for this equipment were first established in the Energy Independence and Security Act of 2007. DOE has set a deadline of 2014 for a new final rule.
- Walk-in coolers and freezers. The coolers and freezers covered by the new standards are used primarily in the food service and food sales industry. Coolers and freezers covered by the regulations are enclosed storage spaces that can be walked into, have a total chilled storage area of less than 3,000 square feet, and do not include products designed and marketed exclusively for medical, scientific, or research purposes. The 2013 standards for walk-in coolers and freezers set a minimum R-value* for insulating panels, as well as requirements for doors, door closures, motors and lighting. Standards for this equipment were first established in the Energy Independence and Security Act of 2007. DOE has set a deadline of 2014 for a new final rule. (*R-value is a measure of the amount of insulation provided. For example, insulation panels with a higher R-value will allow less heat to pass through them.) Proposed regulations were released in August 2013 that, if finalized, would prevent the emission of almost 300 million tons of CO2 over 30 years.