
F&L AC Stand Calculator
Wind Load & Frame Sizing
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Free
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About
F&L AC Stand Calculator helps HVAC contractors and installers quickly estimate wind loads on rooftop and ground-level AC unit stands and determine the minimum number of leg frames required for a given configuration.
HOW IT WORKS
Enter your unit dimensions, stand height, wind speed, building height, and whether the installation is coastal or non-coastal. The app calculates:
• Total frontal area
• Uplift and lateral wind pressure
• Minimum required leg frames for standard, heavy-duty, and light-duty systems
FEATURES
• Support for up to 10 units per stand
• Stand heights of 18", 24", and 30"
• Coastal and non-coastal wind exposure settings
• Email or print a copy of your results directly from the app
WHO IT'S FOR
Built for HVAC installers, contractors, and engineers who need a fast field reference when sizing AC unit stands.
Note: This tool provides engineering estimates to assist with stand sizing. Always verify results against your local building code requirements and consult a licensed engineer for final structural sign-off.
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What's New in F&L AC Stand Calculator
1.1.1
October 7, 2026
Refreshed app icon and minor improvements.







