Virginia Blower Door Info Hub
Explore practical guides, checklists, code references, technical bulletins, graphics, and case studies about blower door testing, duct leakage testing, residential air sealing, and energy-code requirements.
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What Is a Blower Door Test?
A plain-language introduction to blower door testing, how airtightness is measured, and why testing matters.
What Is Duct Leakage Testing?
Learn how residential duct systems are pressure-tested and why duct leakage affects comfort and efficiency.
Test Preparation Checklist
Prepare a home or jobsite for blower door testing with this practical pre-test checklist.
Common Air-Leak Locations
Review the building components and connections where uncontrolled air leakage commonly occurs.
Air Intrusion Graphic
See how outside air can enter through gaps, penetrations, and incomplete air-barrier connections.
Air Leakage Pie Chart
Compare common sources of residential air leakage using an easy-to-read visual summary.
Air Sealing — Why It Matters
Understand how air sealing can improve comfort, energy efficiency, and building performance.
Air Sealing the Framing
Review practical air-sealing details at framing joints and common wall connections.
Air Sealing — If It Goes Through the Roof
Learn why roof and ceiling penetrations require careful air sealing.
Codes — Blower Door Test
Review current blower door testing code excerpts and requirements used for residential projects.
Codes — Duct Leakage Test
Review current residential duct leakage testing code excerpts and requirements.
Codes — Table R402
View the residential air-barrier and insulation installation criteria summarized in Table R402.
Code Summary Graphic
A visual summary of key residential energy-code testing concepts.
Technical Bulletin — Blower Door
Technical guidance for blower door testing procedures, preparation, and reporting.
Technical Bulletin — Duct Leakage
Technical guidance for residential duct leakage testing and reporting.
Case Study — Electrical Boxes
See how electrical boxes can become air-leakage pathways and how sealing details affect performance.
Case Study — Duct Boot Sealing
Review a practical example of air leakage around duct boots and effective sealing methods.
Need Professional Testing?
Review the resources above, then request an estimate for blower door testing, duct leakage testing, or on-site air-sealing guidance.
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