RED Calc Free

v1.0, Legacy Tool

RED Calc Pro Advantages
Save your calculations to RED Cloud ♦ Organize your work in folders ♦ Save time with templates ♦ Print and save PDF reports ♦ Customizable report headers and footers ♦ Preferential support ♦ Multi-tab/window syncing ♦ Fully functional offline mode ♦ No ads

Free Tool Summary: Calculates required minimum flow rate of dwelling-unit ventilation. Complies with ASHRAE 62.2-2013, including Alternative Compliance Path, fan run-time, and leakage-rate solver. Scope includes detached dwellings and dwelling units in multifamily buildings of any height. See Tool Guide. Click on any input or result label for help. By using this tool (application) you agree to the Terms of Use.

This legacy tool is NOT optimized for mobile devices. Stay tuned for the mobile-optimized version.

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