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2. Furnace (central heating) - Wikipedia

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

   In some areas electrical resistance heating is used, especially where the cost of electricity is low or the primary purpose is for air conditioning. Modern high-efficiency furnaces can be up to 98% efficient and operate without a chimney, with a typical gas furnace being about 80% efficient. [1]

3. 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 ...

4. The Inflation Reduction Act offers subsidies for heat pumps ...

   www.aol.com/news/inflation-reduction-act-offers...

   According to This Old House, the home improvement news and entertainment outlet, a new gas furnace costs between $1,700 and $9,700 and a new oil furnace costs $4,300 to $9,200. Heat pumps do ...

5. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Typical efficiencies for central heating (measured at the customer's purchase of energy) are: 65–97% for gas-fired heating; 80–89% for oil-fired and; 45–60% for coal-fired heating. [26] Oil storage tanks, especially underground storage tanks, can also impact the environment. Even if a building's heating system was converted from oil long ...

6. Winter heating outlook: Natural gas users get a break, oil ...

   www.aol.com/winter-heating-outlook-natural-gas...

   The average home using heating oil is projected to pay $1,851 to keep warm, compared to $601 for an average home using natural gas or $1,063 for electricity, the EIA said.

7. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   For example, six air changes per hour means an amount of new air, equal to the volume of the space, is added every ten minutes. For human comfort, a minimum of four air changes per hour is typical, though warehouses might have only two. Too high of an air change rate may be uncomfortable, akin to a wind tunnel which has thousands of changes per ...