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Calculate energy savings from new windows
In Climate Zone 5, insulation (low U-factor) is most important for windows.
Climate Zone
5
Electricity
$0.10/kWh
Labor Costs
95% avg
Calculate your potential savings from new energy-efficient windows in your area.
Climate: 4,500 HDD / 1,200 CDD
Standard window: 12-15 sq ft, Large picture window: 25-40 sq ft
U-Factor: 1.2
U-Factor: 0.3 • Energy Star Eligible
Annual Savings
$462
/year
Project Cost
$8,400
installed
Payback Period
18.2 years
to break even
25-Year Savings
$3,150
net lifetime
Environmental Impact
Reduce your carbon footprint by 3,036 lbs CO₂ per year — equivalent to planting 63 trees annually.
Federal Tax Credit Available
Energy Star windows qualify for up to $600 in federal tax credits (30% of cost, up to $600). This could reduce your payback period by 1.3 years.
Savings estimates based on U.S. Department of Energy calculations and local climate data. Actual savings vary based on home insulation, HVAC efficiency, and usage patterns. Professional energy audit recommended for accurate projections.
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Utah is in Climate Zone 5 - Cool-Humid/Cold (significant heating, moderate cooling). Homes here typically have higher heating demands than cooling.
Our calculator uses real-world efficiency data and your local energy costs:
For the best window replacement experience, consult professionals when:
Going from single-pane to Energy Star windows typically saves 10-25% on heating and cooling costs. If you currently have reasonably modern double-pane windows, savings are more modest—maybe 5-10%. Exact savings depend heavily on your climate and energy costs.
Typically 10-20 years based on energy savings alone. In extreme climates with high energy costs and old single-pane windows, you might see 7-10 years. With newer double-pane windows and mild climates, it could be 20+ years.
For most climates, no. Triple pane adds 15-25% to the cost but only 5-10% to efficiency. They make sense in very cold climates (below 0°F regularly) or when noise reduction is a priority.
If your budget allows, yes. You get better pricing on larger projects, and you'll have consistent appearance and performance throughout your home. If budget is tight, prioritize the oldest or worst-performing windows first.