RED Calc Free
v1.0, Legacy Tool
Upgrade to RED Calc Pro
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You can use RED Calc Pro for 30 days free!
- Sign up for a monthly or yearly subscription. To do so, you must use your credit card, which will not be charged until the 30-day free trial period ends.
- If you think RED Calc Pro is not for you, you may cancel your subscription during the free-trial period, no charge, no fees.
Free Tool Summary: Calculates required minimum flow rate of dwelling-unit ventilation. Complies with ASHRAE 62.2-2010, including Alternative Compliance Path and fan run-time. Scope includes detached dwellings and dwelling units in multifamily buildings of three stories or fewer above grade. 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.