Q:

How can you convert between BTUs and CFH?

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Quick Answer

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.

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Full Answer

The 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.

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Related Questions

  • Q:

    How do you calculate CFH from BTU?

    A:

    To calculate CFH from BTU, identify the BTU number, then utilize the equation by multiplying the BTU number by the appropriate factor. The process takes about 5 minutes and requires access to a calculator.

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  • Q:

    What are some common units used for water measurements?

    A:

    Some common units used for water measurements are ounce, fluid ounce, cup, pint and gallon. Other measurements are liter and milliliter. Fluid ounce and ounce are different because fluid ounce measures volume while ounce measures mass, but volume and mass are the same in the case of water.

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  • Q:

    How do you convert 130 degrees Fahrenheit to Celsius?

    A:

    The complete equation is C = 5/9 (F - 32), where F is the temperature in degrees Fahrenheit and C is the temperature in degrees Celsius. Subtract 32 from the temperature in degrees Fahrenheit, which is 130 in this case. Then, multiply the difference by the numerator. Finally, divide the product by the denominator, and you will get a final answer of 54.44 degrees Celsius.

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  • Q:

    What is 37.0 degrees Celsius on the Fahrenheit scale?

    A:

    Converting 37.0 degrees Celsius to the Fahrenheit scale results in 98.6 degrees, which is the average normal temperature, or normothermia, for the human body. One can make the conversion by multiplying the Celsius temperature by 1.8 and then adding 32. For rough estimates of weather temperatures, the Celsius degrees can be doubled and then increased by 30.

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