Low-conductivity gas fill

Low-conductivity gas fill

Transparent gas installed between two or more panes of glass in a sealed, insulated window that resists the conduction of heat more effectively than air. The fill boosts a window’s R-value and reduces its U-factor.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
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The windows use suspended low-e films and coatings along with low-conductivity gas fills and spacers to reach an insulating value of R-20.

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