The British thermal unit, or BTU, is a unit of the energy needed to change the temperature of a pint of water by one degree Fahrenheit. One cubic foot, or CF, of natural gas can change the temperature equivalent to about 1000 BTUs. Therefore, a flow of 1 cubic foot per hour, or CFH, of natural gas is equivalent to providing approximately 1000 BTUs every hour.
Know MoreThe energy content of a natural gas depends on its composition, which means there is no universal conversion factor between volume and energy. Residential natural gas customers get a measure known as therms on their bills. One therm is equivalent to 100,000 BTUs. In the natural gas industry, MBTUs, which is the short form for one million BTUs, are also sometimes used to compare the energy content between various natural gas and fuels.
In 2009, on a daily basis, the average American home consumed 193 cubic feet of natural gas. Determining whether natural gas or heating oil is more efficient is a good exercise in energy efficiency. Assuming a 1025 BTU per cubic foot natural gas and that 81,300 cubic foot is consumed in a year, a total of 83,332,500 BTUs is consumed. Compare this to consuming 584 gallons of heating oil at 138,690 BTU per gallon, which yields 80,994,496 BTU. In this example scenario, natural gas is less efficient than heating oil at heating the home. The cost of the electricity can then be computed based on the total BTUs and a decision made on which fuel to use.
Learn more about MeasurementsHeat provides the energy needed to change a solid into a liquid. Heat energy is added to break the bonds between molecules in a solid. The amount of heat needed to cause a solid to turn to a liquid is called the melting point.
Full Answer >Calculations of the number of British Thermal Units necessary to heat or cool each square foot of a room must also account for the climate zone and the room's insulation, sun exposure and primary function. Some calculations also account for the ceiling height. Divide the final BTU calculation by the total square footage to get the number of BTUs per square foot.
Full Answer >The unit for frequency in the International System of Units is hertz, which is abbreviated as Hz. One hertz is defined as a frequency of one cycle per second.
Full Answer >The unit for measuring the loudness of sound is the decibel. This unit is one-tenth of a Bel. The Bel was named in honor of Alexander Graham Bell, the inventor of the telephone and phonograph.
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