Enter
Values Below 
Area
to be upgraded 

Square
Feet 
Enter
the surface area of the space where insulation is to be upgraded. 
Heating
Degree Days 

HDD
(Fahrenheit) 
Help
on finding Heating Degree Days for your area 
Current
R Value 

US
R Value 
Help
on looking up R values 
New
Total R Value 

US
R Value 
Help
on looking up R values 
Pick
your fuel type below  Then, correct fuel cost and furnace efficiency
if desired 
Natural Gas
Fuel Oil
Propane
Electricity



Percent 


Click
Calculate button to update fuel saving 
$
Saving per year 

Dollars 
The
dollar saving in fuel cost for the first year. 
$
Saving for 10 years 

Dollars 
The
dollar saving in fuel costs for the first 10 years, assuming
a10% 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. 