E-Star: Energy Saving Calculations

Energy Saving
Calculations

Energy Savings from Reducing Air Infiltration

The following calculation is designed to provide you with an estimate of the amount of dollars that you can expect to save on your heating bill by reducing the air infiltration of your home. The calculations are simplified, so your actual savings could vary but it will give you a good ballpark figure.

For this calculation you will need:

Volume of your house
Cost/unit of heating fuel

Throughout the form below you will find links to supportive information you may need to help you complete the calculation. Use your Back button to return to the form.

Volume of Home or Building: This is usually calculated using exterior dimensions (width x length x height). You need to include all space within the structure excluding attached garages but including basements and crawl spaces (unless the crawl spaces are closed off and ventilated).
Estimated Current Leakage Rate: See accompanying table for help in estimating your current air changes per hour (ACPH) rate for you home or building.
Proposed Leakage Rate after Tightening: See accompanying table for help in determining your air changes per hour (ACPH) rate after tightening your home or building.
Heating Degrees Days for Your Location: Heating Degree Days are a common measure of severity of heating climate. You will find the average heating degree days for a location near you on the accompanying table.
Heating Fuel Type: Select from pull down at right.
Heating Fuel Cost/Unit (enter amount in dollars): Take a recent heating bill and divide total cost by units of heating fuel consumed. If you know of a standard monthly charge, remove that from the total first.	$
Heating System Efficiency (enter amount as .xx): See accompanying table for determining your heating system efficiency.

Dollar Savings: Amount of dollars saved annually by reducing air infiltration.	$

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