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HOW TO USE THIS
CALCULATOR
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1. Turn off
all appliances (including the pilot burner) except the appliance you
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want to measure the BTU input for.
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2. Turn the appliance on.
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3. Clock the
time it takes the gas meter to show you have consumed 1 cubic
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foot of natural gas (the number of cubit
feet can be adjusted to fit your
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situation). Use a stop watch or the second
hand on your watch to time how
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long it takes for the appliance to use
a given amount of gas (cubic feet of gas).
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4. Enter the
amount of gas consumed on the form input
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5.
Enter the minutes and seconds it took for the gas meter to register the
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consumption measured in step 3. Example: To enter 1
minute and 20 seconds,
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enter "1" in the minute text
box, and enter "20" in the seconds text box.
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4. If you
know the BTU content of the natural gas in your area, enter it in the
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natural gas BTU/CF. If you do not know the
actual BTU content for natural
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gas in your area, use the default value of
1025 BTU per cubic foot.
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5. The
appliance is burning the BTU that show in the results window. Please be
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aware that this is the input, not the
output. Vented fossil fuel appliances are
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never 100% efficient. Actual efficiencies
can be between 55% and 98%.
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