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- Annual_fuel_utilization_efficiency abstract "The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of combustion equipment like furnaces, boilers, and water heaters. 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, including the operating transients. It is a dimensionless ratio of useful energy output to energy input, expressed as a percentage. For example, a 90% AFUE for a gas furnace means it outputs 90 BTUs of useful heating for every 100 BTUs of natural gas input (where the rest may be wasted heat in the exhaust). A higher AFUE means higher efficiency.The method for determining the AFUE for residential furnaces is the subject of ASHRAE Standard 103. A furnace with a thermal efficiency (ηth) of 78% may yield an AFUE of only 64% or so, for example, under the standard's test conditions. When estimating annual or seasonal energy used by combustion devices, the AFUE is the better efficiency measure to use in the calculations. But for an instantaneous fuel consumption rate, the thermal efficiency may be better.Note that the theoretical limit for a conventional furnace's instantaneous efficiency is 100%, whereas a heat pump used for building heating may exceed 100%. For example, a COP of 1.5 is equivalent to 150%. Heat pumps are readily available for electric and gas sources. So from a theoretical perspective, in some use cases the name \"efficiency\" may be misleading.".
- Annual_fuel_utilization_efficiency wikiPageID "8074252".
- Annual_fuel_utilization_efficiency wikiPageLength "3228".
- Annual_fuel_utilization_efficiency wikiPageOutDegree "20".
- Annual_fuel_utilization_efficiency wikiPageRevisionID "686820498".
- Annual_fuel_utilization_efficiency wikiPageWikiLink ASHRAE.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Air_source_heat_pumps.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Boiler.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Category:Heating,_ventilating,_and_air_conditioning.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Coefficient_of_performance.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Electric_heating.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Firewood.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Furnace.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Geothermal_heat_pump.
- Annual_fuel_utilization_efficiency wikiPageWikiLink HSPF.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Heating_oil.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Natural_gas.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Propane.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Seasonal_energy_efficiency_ratio.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Thermal_efficiency.
- Annual_fuel_utilization_efficiency wikiPageWikiLink Water_heating.
- Annual_fuel_utilization_efficiency wikiPageWikiLinkText "AFUE".
- Annual_fuel_utilization_efficiency wikiPageWikiLinkText "Annual Fuel Utilization Efficiency".
- Annual_fuel_utilization_efficiency wikiPageWikiLinkText "Annual fuel utilization efficiency".
- Annual_fuel_utilization_efficiency wikiPageUsesTemplate Template:Mech-engineering-stub.
- Annual_fuel_utilization_efficiency subject Category:Heating,_ventilating,_and_air_conditioning.
- Annual_fuel_utilization_efficiency hypernym Measure.
- Annual_fuel_utilization_efficiency type Software.
- Annual_fuel_utilization_efficiency comment "The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of combustion equipment like furnaces, boilers, and water heaters. 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, including the operating transients.".
- Annual_fuel_utilization_efficiency label "Annual fuel utilization efficiency".
- Annual_fuel_utilization_efficiency sameAs Q4769688.
- Annual_fuel_utilization_efficiency sameAs m.026qhch.
- Annual_fuel_utilization_efficiency sameAs Q4769688.
- Annual_fuel_utilization_efficiency wasDerivedFrom Annual_fuel_utilization_efficiency?oldid=686820498.
- Annual_fuel_utilization_efficiency isPrimaryTopicOf Annual_fuel_utilization_efficiency.