# Terms of Use

**Last updated: June 2025**

By accessing or using SunRayControl ("the tool"), you agree to the following terms.

## 1. Permitted Use

SunRayControl is provided free of charge for personal, educational, and research purposes. You may use, share, and adapt it in accordance with the [MIT License](LICENSE).

## 2. No Engineering Reliance

This tool is intended for **educational and illustrative purposes only**. It is based on a simplified geometric model and idealized solar-position formulas. It does not account for diffuse radiation, cloud cover, reflections, external obstructions (neighboring buildings, terrain, trees), thermal mass, or any other real-world factor that affects actual solar gain in a building.

**Results produced by this tool must not be used as the sole or primary basis for any engineering, architectural, construction, or financial decision.** For design work, always engage a qualified professional and use appropriate simulation software (e.g. EnergyPlus, IDA ICE, DesignBuilder, or equivalent).

## 3. No Warranty

The tool is provided "as is", without warranty of any kind, express or implied, including but not limited to accuracy, fitness for a particular purpose, or non-infringement. The author makes no guarantee that results are correct, complete, or applicable to any specific building or location.

## 4. Limitation of Liability

To the fullest extent permitted by applicable law, the author shall not be liable for any direct, indirect, incidental, consequential, or special damages arising from the use of or reliance on this tool, even if advised of the possibility of such damages.

## 5. Modifications and Redistribution

You are free to modify and redistribute this tool under the terms of the [MIT License](LICENSE). If you redistribute a modified version, you must make clear that it has been changed from the original and must not misrepresent it as the original tool.

## 6. Changes to These Terms

These terms may be updated at any time. Continued use of the tool after any update constitutes acceptance of the revised terms.

## 7. Contact

For questions or feedback, please open an issue on the [GitHub repository](https://github.com/yourusername/sunraycontrol).