Privacy policy
Controller
CO2piping.com (co2piping.com). Contact: Co2Calc@proton.me.
Calculations and project files
All calculations run in your browser. The values you enter are not sent to us. Project files are saved as files on your own computer (with "Save as" in Chrome and Edge, in the file and folder you choose). The browser's local storage is used for your language choice and similar settings and, if autosave is on, for the latest version of your project, so that it can be restored after a crash; it never leaves your computer and you can turn autosave off in each calculator.
Share links
"Share as link" puts the project data in the address of the link, after the # sign. That part of the address is never sent to our server or to Google.
Anyone who has the link can read everything in the project. The link may be saved in the browser history and in the messaging services it is sent with. Remove personal data, such as names, addresses and notes, before you share.
When a link is opened, the data is kept briefly in the browser's sessionStorage and removed as soon as the project has been loaded. We do not store or receive project data; you are responsible for what you share.
Cookies and consent
We use Google's consent management platform, a Google-certified CMP under the IAB TCF 2.2 framework. Visitors in the EEA, the UK and Switzerland choose whether statistics and advertising cookies may be used. In some US states you can opt out of the sale and sharing of personal information. Necessary cookies are required for the website and your choice to work. You can change your choice at any time via the Cookie settings link at the bottom of every page.
Google Analytics
With your consent to statistics, we use Google Analytics 4 to see how the website is used, for example which pages are visited. The data are processed by Google Ireland Limited. More information: https://policies.google.com/privacy
Google AdSense
With your consent to marketing, ads are shown via Google AdSense. Google and other third-party vendors use cookies to serve ads based on previous visits to this and other websites. You can turn off personalised ads in Google's ad settings: https://adssettings.google.com
How Google uses data from sites that use its services: https://policies.google.com/technologies/partner-sites
Affiliate links (Amazon)
Some guides show a box marked as advertising with search links to Amazon (Amazon Associates programme). We set no cookies of our own for these links and do not record your clicks.
When you click a link, Amazon sets its own cookies on its site and Amazon's privacy notice applies (linked at the bottom of every Amazon page).
Hosting
The website is delivered via Vercel. On every visit, technical data such as IP address and browser type are processed to deliver the page and protect the service.
Legal basis and retention
Statistics and advertising cookies are used only with your consent (GDPR Article 6(1)(a)). Technical data in the hosting logs are processed on the basis of our legitimate interest in delivering the website securely and preventing misuse (Article 6(1)(f)).
Google Analytics data are kept for the retention period set in Google Analytics, at most 14 months. Hosting logs are kept only briefly, according to Vercel's terms. Emails are deleted when the matter is closed, at the latest after two years.
Transfers outside the EU/EEA
Google and Vercel may process data in the USA. Such transfers are based on the EU–US Data Privacy Framework or on the European Commission's standard contractual clauses.
If you email us, for example to report a bug, we use your address and message only to answer you and fix the problem (legitimate interest, Article 6(1)(f)).
Your rights
Under the General Data Protection Regulation (GDPR) you have the right to request access to, rectification or erasure of your personal data and to object to the processing. Contact us at Co2Calc@proton.me. You can also lodge a complaint with the Swedish Authority for Privacy Protection (IMY), https://www.imy.se, or with the supervisory authority in your country.
You also have the right to restriction of processing and to data portability. You can withdraw your consent at any time via the Cookie settings link; this does not affect processing carried out before the withdrawal.
Changes
This policy may be updated. The date below shows the latest change.
Last updated 2026-11-02