This site uses minimal local storage to work properly — no tracking, no advertising.
We do not use tracking or advertising cookies. We store only your language preference in your browser’s local storage (key tch-lang), so the site opens in your chosen language on your next visit.
Our chat widgets keep your conversation locally in your browser during the session. Nothing is stored on our servers unless you submit a form.
You can clear stored data at any time in your browser settings; the site will then fall back to your browser language.
Questions about this policy: sales@tch-hydro.com.
Last updated: September 2026.