| Insulation Savings Calculator |
Spending money on insulating your house is an investment!
It's return is in consistently lower utility bills to heat and cool your house.
Insulation resists the flow of heat. Knowing the R values before and after an insulation upgrade and the average temperature
difference across the insulation, you can calculate the amount that the insulation upgrade reduces heat flow.
Knowing the cost of energy and the cost of the insulation upgrade, you can calculate the rate of return on your investment in insulation.
This interactive calculator does these calculations for you, letting you quickly and easily investigate the cost-effectiveness of various
insulation upgrades.
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| Old R Value: |
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Added R Value: |
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| Area: |
(Square Feet) |
Cost Of Insulation: |
$ |
| Heating Degree Days: |
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Cooling Degree Days: |
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The average Heating Degree Days in Michigan is 6569 and the average Cooling Degree Days in Michigan is 626.
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The National Weather Service provides HDD and CDD values, but these are both calculated against a base temperature of 65F, which is a little colder than most indoor spaces in winter, and much cooler in the summer.
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| Natural Gas Cost: |
$ per Therm |
Electricity Cost : |
$ per Kilowatt Hour |
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Type Of Heating / Cooling System:
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Heating COP:
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Cooling COP:
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COP stands for "Coefficient of Performance". It is a non dimensional representation of the efficiency of a cooling or heating system, as is EER, which has the units of BTUH/Watt. To convert EER to COP, multiply it by 0.293.
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| Energy Saved per Year: |
BTU =
KWH
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| $$ Saved per year |
$ |
Return on Investment |
% per year |
Don't be surprised at a fairly large rate of return, especially if your house is poorly insulated, you live in a severe climate, have an inefficient heating or cooling unit, or expensive fuel.
Bear in mind that this calculates monetary rate of return. The savings of energy is also environmentally beneficial, reducing a variety of pollutants, and conserving finite fossil fuel supplies.
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