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2. Electric heating - Wikipedia

   en.wikipedia.org/wiki/Electric_heating

   The efficiency of any system depends on the definition of the boundaries of the system. For an electrical energy customer the efficiency of electric space heating is 100% because all purchased energy is converted to heat. However, if a power plant supplying electricity is included, the overall efficiency drops drastically.

3. Energy conversion efficiency - Wikipedia

   en.wikipedia.org/wiki/Energy_conversion_efficiency

   Thermal efficiency or Fuel efficiency, useful heat and/or work output per input energy such as the fuel consumed; 'Total efficiency', e.g., for cogeneration, useful electric power and heat output per fuel energy consumed. Same as the thermal efficiency.

4. Thermal efficiency - Wikipedia

   en.wikipedia.org/wiki/Thermal_efficiency

   Therefore, heat pumps can be a more efficient way of heating than simply converting the input work into heat, as in an electric heater or furnace. Since they are heat engines, these devices are also limited by Carnot's theorem. The limiting value of the Carnot 'efficiency' for these processes, with the equality theoretically achievable only ...

5. These Energy-Efficient Home Upgrades Can Save You Serious - AOL

   www.aol.com/energy-efficient-home-upgrades-save...

   2. Install an electric heat pump. Heat pumps, an energy-efficient alternative to furnaces and air conditioners, use electricity to heat or cool your home — depending on the time of year.While ...

6. Electric boiler - Wikipedia

   en.wikipedia.org/wiki/Electric_boiler

   Electric heating is generally highly efficient; since there is no stream of waste combustion gases emitting from the boiler, nearly all the purchased energy appears in the product hot water or steam in useful form. This high efficiency even in small sizes partly offsets the generally higher cost of electric energy compared to fossil fuels.

7. Thermoelectric generator - Wikipedia

   en.wikipedia.org/wiki/Thermoelectric_generator

   Every human activity, transport and industrial process generates waste heat, being possible to harvest residual energy from cars, aircraft, ships, industries and the human body. [1] From cars the main source of energy is the exhaust gas. [32] Harvesting that heat energy using a thermoelectric generator can increase the fuel efficiency of the car.