to offer (usually something intangible): to proffer friendship Origin of proffer Middle English profren from Anglo-French and Old French proffrir from poroffrir from por-, pro- + offrir from Vulgar Latin an unverified form offerire, for Classical Latin offerre, to offer
TOTAL. Natural gas is measured in therms or BTUs. A therm is a measurement of the amount of heat energy in natural gas, equal to 100,000 BTUs. A BTU, or British Thermal Unit, is the quantity of heat required to raise the temperature of one pound of water by one degree Fahrenheit. The current charge for natural gas from Peoples Gas is $0.3641 per therm. If you would like to change the rate used in the calculations above, enter a new rate below. $ per therm.
Coal = 19,210,000 Btu per short ton (2,000 pounds) Note: heat contents of coal vary widely by types of coal. Natural gas = 1,025,000 Btu per 1,000 cubic feet (Mcf). Petroleum = 5,892,000 Btu per Barrel (42 gallons) Note: Heat contents vary by type of petroleum product. 1 Heat rates for steam electric generators in 2013. Amount of fuel used to generate 1 kilowatthour (kWh): 2  Coal = 0.00052 short tons or 1.05 pounds. 3  Natural gas = 0.01010 Mcf (an Mcf equals 1,000 cubic feet). 4  Petroleum = 0.00175 barrels (or 0.07 gallons).