Terms of Use

By accessing and using the HVAC Duct Pressure Calculator, you agree to the following terms:

1. Acceptance of Terms

Use of this service constitutes acceptance of these terms. If you do not agree, discontinue use immediately.

2. Service Provided "As-Is"

• This tool is provided without any warranty, express or implied
• No guarantee of accuracy, reliability, or availability
• Results are estimates and may contain errors

3. No Liability

The developer assumes no liability for:

• Errors, omissions, or inaccuracies in calculations
• Damages resulting from use or inability to use this service
• Design failures, system malfunctions, or installation issues
• Financial losses, property damage, or personal injury arising from use of this tool

4. Service Modifications

• The service may be modified, updated, or discontinued at any time without notice
• Features may be added, changed, or removed
• No commitment to maintain backward compatibility

5. Account Terms

• User accounts may be terminated at the developer's sole discretion
• You are responsible for maintaining the security of your account credentials
• You may not share accounts or transfer access to third parties

6. User Responsibility

You acknowledge that:

• You are solely responsible for your own engineering work product
• You will verify all calculations independently before use in real projects
• Professional engineering judgment and licensure requirements still apply
• This tool does not constitute professional engineering services or advice

7. Methodology References

This calculator is based on primary engineering references including Idelchik's Handbook of Hydraulic Resistance (4th Ed., Begell House, 2007), Rozell (1974), Colebrook (1939), and Sutherland (1893). See the Calculation Method page for full citations.

There is no affiliation with, endorsement by, or official relationship with any publisher, standards organization, or engineering society.

8. Indemnification

You agree to indemnify and hold harmless the developer from any claims, damages, or expenses arising from your use of this service.

9. Governing Law

These terms are governed by applicable local laws. Use of this service does not create any professional relationship or obligation.