Disclaimer & Terms of Use

Last updated: May 2026

1. No Warranty

All tools, utilities, and content provided on this website ("VRFTools") are provided on an "AS IS" and "AS AVAILABLE" basis without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, title, or non-infringement. No guarantee is made regarding the accuracy, reliability, completeness, or suitability of any output generated by these tools.

2. Limitation of Liability

In no event shall VRFTools, its operators, contributors, or affiliates be liable for any direct, indirect, incidental, special, consequential, or exemplary damages arising from the use of or inability to use these tools, including but not limited to procurement of substitute goods or services, loss of data, loss of profits, equipment damage, system misconfiguration, project delays, business interruption, or any other commercial damages or losses, however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise), even if advised of the possibility of such damage.

3. User Responsibility

The end user assumes full and sole responsibility for verifying, validating, and testing all output generated by these tools before applying it to any HVAC controller, system, or installation project. Users should cross-check all configuration files against their design documents, site requirements, and the manufacturer's official documentation and tools (including but not limited to Mitsubishi Electric's ISToolAEC application and Diamond System Builder software) before loading them into any hardware device.

4. No Affiliation

VRFTools is an independent community project and is not affiliated with, endorsed by, or supported by Mitsubishi Electric Corporation or any of its subsidiaries. All trademarks, product names, and brand references are the property of their respective owners and are used here solely for the purpose of identifying compatible equipment.

5. Changes to Tools

Tools and features on this website may be modified, updated, or discontinued at any time without notice. Output format and behavior may change between versions. Users are encouraged to verify output after any tool update.

6. Acceptance

By accessing or using any tool on VRFTools, you acknowledge that you have read, understood, and agree to be bound by this disclaimer in its entirety. If you do not agree with these terms, do not use any tools on this website.