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My natural gas/propane/heating oil use varies over the course of a year. How can I get an accurate number to use in the calculator?
A:
The most accurate way is to add up your monthly heating fuel use over the past 12 months and divide by 12 to get a monthly average. (Or, you can use the national average by clicking the box.) Then enter this number in the Therms/month or Gallons/mont
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