One of the keys to an energy efficient building is a tight building envelope (exterior surface). This means that the roof, walls, windows and floors are well-insulated to reduce heat conduction and carefully sealed to prevent unwanted air leaks by convection. A tight and well-insulated building requires less energy and smaller mechanical systems in order to achieve comfortable interior conditions.

The Center's atrium windows feature:

• Triple-panes for reduced heat loss
• Argon gas interior, which increases insulation value
• Low-emissivity coatings that reflect unwanted heat
• R-value = 7 (standard single or double pane windows have an R-value ranging from 1-2.5)

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