The Diagnostics Blog
Numbers You Can Use, Not Just a Checklist
Most home-performance content tells you to seal your ducts and call it a day. We write about what the actual test results mean — how to read an ACH50 score, how a HERS Index number gets calculated, and exactly which federal tax credit or utility rebate program each of those numbers unlocks. If a home energy audit report has ever sat in a drawer because you didn't know what any of it meant, this is the blog for you. Every guide here is built around the same diagnostics-first philosophy as our audits: measure first, then use the data to maximize every rebate dollar available to you.
Flagship GuideDecoding Your Home Energy Audit Report: What ACH50, HERS Index, and Delta-T Actually Mean for Your Wallet
Most homeowners file their audit report in a drawer without understanding a single number in it. Here's the metric-to-money crosswalk that turns your report into cash.
June 2, 2026
2026 Federal & Utility Rebate Stacking Guide for Home Energy Upgrades
Federal tax credits and utility rebates can be combined — if you document them correctly. Here's the stacking order that captures the most total incentive dollars.
June 9, 2026
Blower Door Test Results Explained: What's a 'Good' ACH50 Score for Your Home?
A 1960s ranch and a 2020 build shouldn't be judged by the same air leakage number. Here's how to know if your ACH50 score is actually good.
June 16, 2026
Thermal Imaging vs. Blower Door: Which Diagnostic Test Should You Get First?
They're not competing tests — they answer different questions. Here's how to decide which one to book first for your specific problem.
June 23, 2026
Real Numbers: What a Data-Driven Energy Retrofit Actually Saves (Before/After Case Study)
Starting ACH50 of 11.2. Final ACH50 of 4.8. Here's exactly what that drop cost, what it saved, and how much of it the rebates covered.
June 30, 2026Ready to Get Your Own Numbers?
Skip the guesswork and book a diagnostic-grade energy audit — certified data, ROI-ranked recommendations, and the documentation your rebate application needs.