How much blower door tests cost depends on location, provider, and whether it is standalone or part of larger audit. For a standalone blower door test performed by a home energy auditor, typical cost ranges from $200 to $500 for a single family home, with national average around $300 to $400. Many energy auditors include blower door testing as part of a comprehensive home energy audit costing $300 to $600 total, which includes infrared scan and recommendations. Some utilities subsidize or provide free blower door tests through low-income weatherization or energy efficiency programs, so income-qualified homeowners may get it free through Weatherization Assistance Program. For new construction code compliance testing required by IECC energy code, builders often pay $200 to $350 per test from a certified HERS rater or BPI analyst. Large or complex homes over 4000 square feet may cost $500 to $800. If you hire a HERS rater to do full HERS rating with blower door and duct blaster testing, cost is $500 to $1000. DIY blower door rental is possible in some areas for $50 to $100 per day, but professional testing with calibrated equipment and report is recommended for accuracy and code compliance.
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