Window Energy Efficiency Calculator

Compare window types and calculate savings from upgrading your windows.

1.2Kuses
8.9/10(254)
Annual Savings
$222
Payback Period
37.6 yrs
Upgrade Cost
$8,325
Total Area
180 sq ft
Current U-Factor
1.1
Upgrade U-Factor
0.26
Heating Savings
$218/yr
Cooling Savings
$4/yr

Window Energy Ratings

U-factor measures heat transfer rate (lower is better). SHGC measures solar heat gain (lower blocks more heat). Both affect energy costs.

Disclaimer: This tool is provided as-is for informational and educational purposes only.

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