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2TORIAL
Learn2 Calculate Utility Costs (continued)
Step 4: Calculate natural gas costs

Natural gas costs are calculated in a way nearly identical to electric power. You have monthly use in hours that you came up with in Step 2. You'll convert that figure into a gas measurement called Btu (or a related one called therms), which measures how much gas the appliance will use over the course of an hour. Finally, find out what rate you are paying per Btu (or therm). Then you'll multiplty that figure by the power company's charge per Btu. To find out the rate that you're paying for each Btu, look at your gas bill or call the gas company.

For each item on your list which uses natural gas, find out its hourly Btu usage by looking at its serial plate or the EnergyGuide label attached to it.


Multiply each item's Btu usage by its hourly uasge per month that you calculated in Step 2.


Now multiply the item's Btu usage by the rate you pay per Btu. (If your gas company charges per therm, first divide the Btu by 100,000, and then multiply it by the gas company's rate per therm.) The result is how much you pay to run the appliance each month. You've now done a careful estimation of the energy consumption and costs of a single appliance.




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2TORIAL STEPS
Introduction
Step 1: Make a list of systems and appliances
Step 2: Estimate hourly usage per month
Step 3: Calculate electrical costs
Step 4: Calculate natural gas costs

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