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Savings Calculator - Insulation

Enter the values below and press the calculate button.
1. Area to be upgraded		Square Feet	Enter the surface area of the space where insulation is to be upgraded.
2. Heating Degree Days	View Heating Degree Day Lookup Map
3. Cooling Degree Days	View Cooling Degree Day Lookup Map
4. Current R Value		US R Value	Help on looking up R values
5. New Total R Value		US R Value
6. Pick your fuel type below and enter fuel cost
Natural Gas Fuel Oil Propane Electricity
7. Furnace Efficiency

Click Calculate button to update fuel saving
Saving per year	$	The dollar savings in fuel cost for the first year.
Saving over 10 years	$	The dollar savings in fuel costs for the first 10 years, assuming a 10% increase in fuel cost each year.
Greenhouse Gas Reduction	lbs per year	If electricity is the fuel, it is assumed it is generated in a coal fired power plant.

Notes:

If you are starting with an already insulated attic it is important to make a good estimate of the current R value. See this helpful R value help page. This calculator attempts to provide an estimate and should be considered a guide for potential savings as opposed to a guarantee of savings. Actual savings may vary. Savings are for insulation only and do not consider the compounding benefits of air / duct sealing, radiant spray products, and other energy-efficiency products and services offered.

Greenhouse gas emissions are high for electricity because the electricity is assumed to be generated in a coal fired power plant. Coal plants are only about 30% efficient, and coal is a very high Carbon fuel. About 50% of the power generated in the US is from coal fired power plants -- these coal plants account for about 80% of all US electric power generation CO2 emissions.

Additional Resources:

The Department of Energy insulation calculator can help you determine the amount of insulation you need for your home. It is available on-line at : http://www.ornl.gov/~roofs/Zip/ZipHome.html.

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