Windows & doors · definition
Inert gas sealed between glass panes; denser than air, it slows heat transfer. Krypton outperforms argon in thinner triple-pane cavities.
Source: Efficient Windows Collaborative — Glossary
Where this term lands on a Columbus budget
The cost pages carry the current local ranges, and the guides explain what moves them. A published range becomes a project number only after someone looks at the site.