argon gas window fill 5

https://zvwg4q8vyn.evercolumn.com/posts/historic-home-window-repair-preserving-character-without-sacrificing-performance

Argon gas window fill is a technique used in double or triple-pane windows where the space between the panes is filled with argon gas instead of regular air. Argon is denser than air, which reduces heat transfer through the window, improving insulation and energy efficiency. It's a common upgrade in modern windows, especially in colder climates, as it helps keep homes warmer in winter and cooler in summer.