Privacy

We do not ask who you are, we do not use cookies, and we never record what you type.

Last updated 13 November 2026.

Who is responsible

Youell Systems Ltd publishes Energy Calculators and is responsible for this notice. Contact us at max@youellsystems.co.uk, or write to 18 Albert Road, Clayton West, Huddersfield HD8 9NL.

What you type into a calculator

The calculators work in your browser. The numbers you enter are not sent to us.

Your answers are added to the address in your browser's address bar, so you can bookmark a result or send it to someone. Anyone you share that link with will see the numbers in it.

Postcodes

When you type a postcode, your browser downloads our list of postcode areas and looks yours up on your own device. A few areas sit across two energy regions. For those, your browser also downloads a small file for that area, named after the first half of your postcode, such as "OX17". Your full postcode is never sent to us.

Cookies

We do not set cookies. We do not use advertising scripts. Our typefaces are served from our own site, not from another company's.

Counting visits

We count visits with Umami, which we run on our own server in the UK. It does not use cookies. It records the page you visit, the site that sent you, your browser, type of device, language and country, and a few actions such as opening the workings, copying a link or choosing an appliance from the list.

It never records what you type into a calculator, your postcode, or the answers you give. It does not store your IP address. If your browser is set to "Do Not Track", nothing is counted.

Cloudflare, our host, also counts visits for us with Cloudflare Web Analytics. It does not use cookies either, and it does not see what you type into a calculator.

Our host

The site is served by Cloudflare. Like any website host, Cloudflare handles your IP address and the details of each request to deliver pages and protect the site from attacks. Cloudflare explains this in its privacy policy.

If you email us

We use what you send only to reply and, if you report a mistake, to fix it. We keep emails no longer than we need to.

Your rights

You can ask what information we hold about you, and ask us to correct or delete it. Email us to do that. If you are unhappy with how we handle your information, you can complain to the Information Commissioner's Office.

Changes

If we start doing anything new with information, we will change this page first and update the date at the top.