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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. Low-Income Home Energy Assistance Program - Wikipedia

   en.wikipedia.org/wiki/Low-Income_Home_Energy...

   The Low Income Home Energy Assistance Program (LIHEAP, pronounced "lie" "heap") is a United States federal social services program first established in 1981 and funded annually through Congressional appropriations. The mission of LIHEAP is to assist low income households, particularly those with the lowest incomes that pay a high proportion of ...

4. Energy Conservation Program for Consumer Products - Wikipedia

   en.wikipedia.org/wiki/Energy_Conservation...

   The Energy Conservation Program for Consumer Products Other Than Automobiles (42 U.S.C. §§ 6291 – 6309) is a regulatory program that enforces minimum energy conservation standards for appliances and equipment in the United States. [1] The program was established under Part B of Title III of the Energy Policy and Conservation Act of 1975 and ...

5. Minimum efficiency reporting value - Wikipedia

   en.wikipedia.org/wiki/Minimum_Efficiency...

   Minimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to report the effectiveness of air filters in more detail than other ratings. For example, often a high-efficiency particulate air (HEPA) filter is ...

6. Open-hearth furnace - Wikipedia

   en.wikipedia.org/wiki/Open-hearth_furnace

   Open-hearth furnace. An open-hearth furnace or open hearth furnace is any of several kinds of industrial furnace in which excess carbon and other impurities are burnt out of pig iron to produce steel. [1] Because steel is difficult to manufacture owing to its high melting point, normal fuels and furnaces were insufficient for mass production of ...

7. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   The energy efficiency ratio (EER) of a particular cooling device is the ratio of output cooling energy (in BTUs) to input electrical energy (in watt-hours) at a given operating point. EER is generally calculated using a 95 °F (35 °C) outside temperature and an inside (actually return-air) temperature of 80 °F (27 °C) and 50% relative humidity.

8. Heating seasonal performance factor - Wikipedia

   en.wikipedia.org/wiki/Heating_seasonal...

   HSPF is specifically used to measure the efficiency of air source heat pumps. HSPF is defined as the ratio of heat output (measured in BTUs) over the heating season to electricity used (measured in watt-hours). [1][2] It therefore has units of BTU/watt-hr. The higher the HSPF rating of a unit, the more energy efficient it is.

9. Energy Performance Certificate (United Kingdom) - Wikipedia

   en.wikipedia.org/wiki/Energy_Performance...

   Energy performance certificates (EPCs) are a rating scheme to summarise the energy efficiency of buildings. [1][2] The building is given a rating between A (Very efficient) - G (Inefficient). The EPC will also include tips about the most cost-effective ways to improve the home energy rating. Energy performance certificates are used in many ...