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2. Therm - Wikipedia

   en.wikipedia.org/wiki/Therm

   The therm (symbol, thm) is a non-SI unit of heat energy equal to 100,000 British thermal units (BTU), [1] and approximately 105 megajoules, 29.3 kilowatt-hours, 25,200 kilocalories and 25.2 thermies. One therm is the energy content of approximately 100 cubic feet (2.83 cubic metres) of natural gas at standard temperature and pressure. However ...

3. Direct vent fireplace - Wikipedia

   en.wikipedia.org/wiki/Direct_vent_fireplace

   Direct vent fireplaces are extremely efficient compared to a traditional fireplace and can operate at about 85% efficiency. Even a very efficient traditional fireplace only operates at about 15% efficiency. This is because most of the hot air generated by the fire travels up the chimney due to convection.

4. Economics of nuclear power plants - Wikipedia

   en.wikipedia.org/wiki/Economics_of_nuclear_power...

   Financial firm Lazard also updated its levelized cost of electricity report costing new nuclear at between $0.118/kWh and $0.192/kWh using a commercial 7.7% cost of capital (WACC - pre-tax 12% cost for the higher-risk 40% equity finance and 8% cost for the 60% loan finance) over a 40-year lifetime.

5. 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Prices reached a low of around (2006 US) $17/Mcm in the late 1940s, when more than 20 percent of the natural gas being withdrawn from U.S. reserves was vented or flared.

6. Napoleon (company) - Wikipedia

   en.wikipedia.org/wiki/Napoleon_(company)

   Wolf Steel Ltd., better known as Napoleon, is the largest privately-owned manufacturer of fireplaces, grills, and gas furnaces in North America. [2] Based in Barrie, Ontario, Napoleon began in 1976 as a steel fabrication business under the name Wolf Steel Ltd. In 1995, Napoleon was founded after the company diversified its production to include ...

7. Air mass (solar energy) - Wikipedia

   en.wikipedia.org/wiki/Air_mass_(solar_energy)

   AM2 (=60°) to AM3 (=70°) is a useful range for estimating the overall average performance of solar cells installed at high latitudes such as in northern Europe. Similarly AM2 to AM3 is useful to estimate wintertime performance in temperate latitudes, e.g. airmass coefficient is greater than 2 at all hours of the day in winter at latitudes as ...