Terms of Service
Last updated: May 15, 2026
Disclaimer
The calculations provided by Attic Ventilation Calculator are based on the 2021 International Residential Code (IRC) Section R806.2 formula and are for informational and planning purposes only. Results are estimates. Always verify ventilation requirements with your local building department before purchasing materials or beginning installation. Local code amendments may differ from the base IRC.
Accuracy
While we strive for accuracy and maintain this calculator based on current IRC standards, we make no warranties or guarantees regarding the completeness, accuracy, or reliability of any calculations or information provided. Building codes are subject to change and local amendments. Use of our tools is at your own risk.
Limitation of Liability
Attic Ventilation Calculator and its operators shall not be held liable for any damages arising from the use of our calculators, tools, or any information provided on this website, including but not limited to improper installation, failed inspections, or structural damage resulting from reliance on our estimates.
Intellectual Property
All content, designs, and code on Attic Ventilation Calculator are owned by their respective creators. You may use our tools freely but may not copy, redistribute, or sell the tools or their source code without written permission.
Changes to Terms
We reserve the right to update these terms at any time. Continued use of the website after changes constitutes acceptance of the updated terms.
Contact
For questions about these terms, contact us at contact@atticventilationcalculator.com.