Privacy Policy

Last updated: August 2026

1. Client-Side Privacy First

We respect your privacy. All interactive calculations performed in your browser run entirely client-side using JavaScript. Your room dimensions, floor areas, and custom U-values are never transmitted to or stored on our servers.

2. No Mandatory User Accounts

You can use all features of the calculator, download PDF reports, and export CSV project files without creating an account, registering an email, or logging in.

3. Information Submitted via Forms

If you voluntarily contact us via our contact form, we collect your name, email address, and message solely to respond to your technical inquiry. We do not sell or share your contact details with third parties.

4. Cookies & Analytics

We may use privacy-respecting, aggregated analytics tools to understand high-level page views and improve the calculation engine without tracking personal identifiable information across third-party sites.