Home Weatherization ROI Calculator
Project-Based ROI
Calculate ROI for specific weatherization projects
Quick Savings Estimate
Formula
Annual Savings = Σ(Energy Bill × Savings Rate × Climate Factor) for each improvement; ROI = (Annual Savings × Years − Net Cost) / Net Cost × 100; Payback = Net Cost / Annual Savings
Frequently Asked Questions
What weatherization improvements have the best ROI?
Air sealing is typically the best ROI, costing $1,000-$2,000 with 10-15% energy savings and payback in 2-3 years. Attic insulation is second best with 3-5 year payback. Weatherstripping doors/windows is very cheap with immediate returns. Duct sealing is also cost-effective.
How much can weatherization save on energy bills?
Comprehensive weatherization typically saves 20-35% on energy bills. Poorly insulated homes in cold climates see the biggest savings. The DOE estimates that air sealing and insulation together can save $200-$600/year for the average home.
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