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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 ...
[citation needed] In the UK, this is a SEDBUK (Seasonal Efficiency of Domestic Boilers in the UK) [4] Band A efficiency rating, while in North America they typically receive an Eco Logo and/or Energy Star Certification. Boiler performance is based on the efficiency of heat transfer and highly dependent on boiler size/output and emitter size/output.
The Home Energy Rating is an American estimated measurement of a home's energy efficiency based on normalized modified end-use loads (nMEULs). [1] In the United States, the Residential Energy Services Network (RESNET) is responsible for creation and maintenance of the RESNET Mortgage Industry National Home Energy Rating Standards (MINHERS), a proprietary system of standards, [2] which includes ...
The House Energy Rating (HER) or House Energy Rating Scheme (HERS) are worldwide standard measures of comparison by which one can evaluate the energy efficiency of a new or an existing building. The comparison is generally done for energy requirements for heating and cooling of indoor space. The energy is the main criterion considered by any ...
Combination boilers are rated by the DHW flow rate. The kW ratings for domestic units are typically 24 kW to 54 kW, giving approximate flow rates of 9 to 23 litres (2.4 to 6.1 US gal) per minute. Larger units are used in commercial and institutional applications, or for multiple-unit dwellings.
Heat Pumps, Heat Pump Water Heaters, Biomass Stoves and Boilers The nonbusiness energy property credit also applies to heat pumps and other energy efficient water heating appliances.
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