GreenGirt XO™ Building Energy Calculator
Stop guessing. Start specifying. The GreenGirt XO Building Energy Calculator delivers real-world thermal performance data so you can design with confidence.
See how much energy legacy window details are costing your building
The GreenGirt XO™ structural thermal framing system pays for itself. On many projects, switching from triple- to double-pane glass alone covers the cost of the entire system, furnished and installed, at 6-7x the energy return. That adds up to tens of thousands of dollars in annual savings, often $1 million or more over 20 years, while meeting the requirements of ASHRAE 90.1.
Based on a 50,000-square-foot non-residential building in Chicago, IL (Climate Zone 5). Results vary by building size, climate zone, and assembly.
Enter your climate zone, wall assembly, and fenestration specs to see exactly what that looks like for your project: U-value improvement, annual energy savings, thermal bridge losses, and output you can drop straight into your specifications.
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