Tools & Calculators
Numbers before quotes
Auditors quote $200-$600 for a walk-through and a blower door test. Before you pay anyone, run the numbers yourself. These tools use 2026 utility data, current state rebate rosters, and the BPI/RESNET certification matrix to tell you what an audit will actually return.
Home Energy Audit ROI Calculator
Plug in your home size, current bill, and retrofit budget. Get projected annual savings, payback period, and a clear-eyed read on what changed when 25C ended.
Open tool →QuizBPI vs RESNET Audit Finder
Three questions. Tells you whether you need a BPI Building Analyst, a RESNET HERS Rater, a DOE Home Energy Score, or a weatherization-grant inspector.
Open tool →NewAir Infiltration Cost Estimator
Estimate how many dollars are leaking out of your house each year based on home age, vintage, and climate zone. Then see what air-sealing actually fixes.
Open tool →Last updated: April 2026. Tools are estimators, not engineering reports. Always verify with a certified auditor before signing a retrofit contract.