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2. Cost of electricity by source - Wikipedia

   en.wikipedia.org/wiki/Cost_of_electricity_by_source

   The levelized cost of electricity (LCOE) is a metric that attempts to compare the costs of different methods of electricity generation consistently. Though LCOE is often presented as the minimum constant price at which electricity must be sold to break even over the lifetime of the project, such a cost analysis requires assumptions about the value of various non-financial costs (environmental ...

3. Home appliance - Wikipedia

   en.wikipedia.org/wiki/Home_appliance

   The broad usage allows for nearly any device intended for domestic use to be a home appliance, including consumer electronics as well as stoves, [5] refrigerators, toasters [5] and air conditioners. The development of self-contained electric and gas-powered appliances, an American innovation, emerged in the early 20th century.

4. Energy factor - Wikipedia

   en.wikipedia.org/wiki/Energy_factor

   The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

5. Gas vs. Electric vs. Hybrid: Find Out Which Is Really the ...

   www.aol.com/gas-vs-electric-vs-hybrid-143021118.html

   Average annual cost of ownership: $12,527 Generally, electric vehicles are the most expensive to own; their annual cost of $12,527 is about 2% higher than the average.

6. Major appliance - Wikipedia

   en.wikipedia.org/wiki/Major_appliance

   A selection of major appliances. A major appliance, also known as a large domestic appliance or large electric appliance or simply a large appliance, large domestic, or large electric, is a non-portable or semi-portable machine used for routine housekeeping tasks such as cooking, washing laundry, or food preservation.

7. Efficient energy use - Wikipedia

   en.wikipedia.org/wiki/Efficient_energy_use

   Increased use of natural and task lighting has been shown by one study to increase productivity in schools and offices. [25] Compact fluorescent lamps use two-thirds less energy and may last 6 to 10 times longer than incandescent light bulbs. Newer fluorescent lights produce a natural light, and in most applications they are cost effective ...