Insulation Energy Savings Calculator
Insulation Upgrade Savings
Formula
Annual Savings = Heating/Cooling Cost x Savings Rate x Location Multiplier. Payback = Install Cost / Annual Savings. Install Cost = Area x Cost per sq ft.
Frequently Asked Questions
What R-value do I need?
Recommended R-values depend on your climate zone. Attics: R-30 to R-60. Walls: R-13 to R-21. Floors: R-13 to R-30. Colder climates need higher R-values. Check the DOE guidelines for your specific zone.
Which insulation type is best?
Fiberglass batts are cheapest but may leave gaps. Blown-in cellulose fills cavities well. Spray foam has the highest R-value per inch and provides air sealing. The best choice depends on location, budget, and existing construction.