TL;DR
An insulated glass unit is the factory-sealed sandwich of two or three glass panes separated by a spacer and desiccant, with the cavity filled with air or argon, that forms the glazing of nearly every modern window. Low-E coatings on internal surfaces and gas fill set its U-factor and solar heat gain numbers on the NFRC label.
What it means
An insulated glass unit is the factory-sealed sandwich of two or three glass panes separated by a spacer and desiccant, with the cavity filled with air or argon, that forms the glazing of nearly every modern window. Low-E coatings on internal surfaces and gas fill set its U-factor and solar heat gain numbers on the NFRC label. When the perimeter seal fails, moisture enters and permanent fog forms between the panes, a defect fixed by replacing the sealed unit alone, often at half the cost of a whole new window.
Where it sits in the glossary
Insulated glass unit 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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