TL;DR
A duct leakage test pressurizes a home's duct system with a calibrated fan — a duct blaster — sealed to the air handler or a register, then measures how many cubic feet per minute escape at a standard 25 pascals (CFM25). The IECC requires the test on new and substantially altered duct systems, with limits commonly near 4 CFM25 per 100 square feet of floor area.
What it means
A duct leakage test pressurizes a home's duct system with a calibrated fan — a duct blaster — sealed to the air handler or a register, then measures how many cubic feet per minute escape at a standard 25 pascals (CFM25). The IECC requires the test on new and substantially altered duct systems, with limits commonly near 4 CFM25 per 100 square feet of floor area. Results decide whether a system passes inspection or needs more mastic before drywall closes things in.
Where it sits in the glossary
Duct leakage test is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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