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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. Furnace (central heating) - Wikipedia

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

   The fourth category of furnace is the high-efficiency condensing gas furnace. 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 ...

4. Natural gas prices - Wikipedia

   en.wikipedia.org/wiki/Natural_gas_prices

   Gas flares were common sights in oilfields and at refineries. U.S. natural gas prices were relatively stable at around (2006 US) $30/Mcm in both the 1930s and the 1960s. Prices reached a low of around (2006 US) $17/Mcm in the late 1940s, when more than 20 percent of the natural gas being withdrawn from U.S. reserves was vented or flared.

5. U.S. gas prices in 2024: how much is gasoline in each state?

   www.aol.com/finance/u-gas-prices-2024-much...

   The average cost of gas has decreased 15% in the last two years, from when it was $4.27 per gallon. The highest recorded average price of regular gas was in June 2022 at $5.06 per gallon.

6. Here's the average price of gas in the Midwest this week - AOL

   www.aol.com/heres-average-price-gas-midwest...

   Here's a look at how weekly regional gas prices changed in the Midwest last week compared with the previous week. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 ...

7. This Was the Cost of Gas the Year You Were Born - AOL

   www.aol.com/finance/cost-gas-were-born-230000763...

   Guzzling Gas. Using data from the Department of Energy, Cheapism determined the average cost of a gallon of gas every year from 1940 through today.Despite constant ups and downs and the 2022 pain ...