TL;DR
An air-change target is the airtightness goal a project commits to before testing, stated in air changes per hour at 50 pascals, that the finished house must meet when the blower door runs. Code sets the floor, 5 ACH50 in IECC climate zones 1-2 and 3 in zones 3-8, while programs like ENERGY STAR and Passive House set stricter marks down to 0.6.
What it means
An air-change target is the airtightness goal a project commits to before testing, stated in air changes per hour at 50 pascals, that the finished house must meet when the blower door runs. Code sets the floor, 5 ACH50 in IECC climate zones 1-2 and 3 in zones 3-8, while programs like ENERGY STAR and Passive House set stricter marks down to 0.6. Insulation and air-sealing contracts increasingly write the number into the scope so payment ties to a measured result. Missing it means returning to seal more before the final inspection.
Where it sits in the glossary
Air-change target 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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