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2. Annual fuel utilization efficiency - Wikipedia

   en.wikipedia.org/wiki/Annual_fuel_utilization...

   The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

3. 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 ...

4. Heating system - Wikipedia

   en.wikipedia.org/wiki/Heating_system

   This category includes furnaces, boilers, and heat pumps. [1] [2] Distributed heating systems: These systems generate heat in the space they are to heat, without extensive duct systems. Examples include electric space heaters, fireplaces, and solar heating. [3]

5. We compared gas vs. electric stoves in our L.A. test kitchen ...

   www.aol.com/news/gas-stoves-phase-tested-flame...

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6. Thermal efficiency - Wikipedia

   en.wikipedia.org/wiki/Thermal_efficiency

   For energy-conversion heating devices their peak steady-state thermal efficiency is often stated, e.g., 'this furnace is 90% efficient', but a more detailed measure of seasonal energy effectiveness is the annual fuel use efficiency (AFUE).

7. Washers and dryers are about to get a whole lot more efficient

   www.aol.com/news/washers-dryers-whole-lot-more...

   Grist reports on new governmental guidelines that will save people $2.2 billion a year in utility costs and eliminate 71 million tons of planet-warming CO2 emissions.

8. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as compared to a mid-efficiency forced-air or forced-draft furnace, is the ...

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

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

   Electric vehicles can be the most expensive to own 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% ...