Privacy policy

Projects are saved as .tct files on your own computer. The tool does not keep a copy of your projects and has no project list on the server.

Opening or saving a file sends its contents to our server to be converted. The conversion happens in a temporary folder that is deleted as soon as the response is sent.

Running the prescriptive or performance check sends the building description on screen to our server, which calculates the result and returns it.

The performance check runs DOE-2.2 on the server. To do that it writes simulation input and output files, named after your project, to a working folder. These files can remain on the server after the run. They describe the building, not you, so avoid putting personal information in the building or project name.

• No sign-in, no user accounts.
• No cookies and nothing saved in your browser's storage.
• No analytics, advertising or tracking scripts.
• No third-party fonts or embeds; the intro video is served from this site.

The site and its server run on Microsoft Azure. As with any website, the host records standard request logs (IP address, time, the page requested and browser type) for security and troubleshooting.

If the tool starts handling data differently, this page will be updated first. Questions go to the lab through the contact page.

Last updated October 2026