Privacy policy

How Sinc Energy handles personal data when schools use our heating service.

Last updated 25 October 2026

1. Who we are

Sinc Energy provides a heating control service for schools: smart radiator valves, and software that heats each room when it's about to be used.

In this policy "Sinc Energy", "we" and "us" mean Sinc Energy Ltd, a company registered in England and Wales (company number 17062974), with its registered office at 98 Cloutsham Street, Northampton, England, NN1 3LN.

For anything about privacy, email privacy@sinc.energy.

2. What this policy covers

This policy explains how we handle personal data when a school uses Sinc Energy, through:

It also covers the enquiries you send us, for example to hello@sinc.energy, and the technical logs kept when you visit our website, sinc.energy (section 4). Our website sets no cookies and uses no analytics.

3. Your school and us

Your school decides to use Sinc Energy and which of its staff can use it. For its staff's personal data, your school is the controller and we are its processor. We only use that data to provide the service to your school, following its instructions and our agreement with it. Your school's own privacy notice for staff also applies.

We are the controller for a small amount of data we use for our own purposes:

4. The personal data we handle

From your school's staff list

Most schools send this from their management information system (MIS) through Wonde, a service your school authorises, and we update it every night. A school's admins can also add people themselves. We only keep the details listed here: no job titles, contracts, phone numbers, home addresses or other HR records.

When you sign in

What you send us

Please don't put anything sensitive in a note, such as health information.

If you use the school console

People we work with at schools

The names, email addresses, phone numbers, roles and notes for each school's contacts for the service.

If you contact us

When you email us, for example at hello@sinc.energy to ask about the service, we keep your name, email address and what you write, to reply and follow up. We keep it for 2 years after your last message, unless you become one of the school contacts above.

Technical data

Heating data

Room temperatures and humidity, valve settings and battery levels, and heating schedules. These are about rooms, not people. Combined with a timetable, though, they can show when a room was in use.

What we don't collect

5. How we use it

We don't sell personal data or use it for advertising. We don't make decisions about you by automated means that have legal or similarly significant effects. Heating requests can be approved automatically, within limits your school sets. That only affects when a room is heated.

6. Signing in with Microsoft or Google

If you choose Sign in with Microsoft or Sign in with Google, Microsoft or Google confirm your email address to us. We use it only to find you on your school's staff list and sign you in.

Sinc Energy's use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

7. Our legal basis

For the data we handle for your school, your school decides the legal basis, and its privacy notice for staff explains it. Schools usually rely on performing a public task, or on their legitimate interests, to run their buildings.

For the data we control, we rely on our legitimate interests: running, securing and supporting our service, and working with the schools that use it.

8. Who sees it and who handles it for us

At your school

At Sinc Energy

A small number of Sinc Energy staff can see every school's data, to set up, support and monitor the service. They sign in with their Sinc Energy Microsoft 365 accounts. Our support team also gets the copies of requests and reports described in section 5.

Our service providers

ProviderWhat they do for usPersonal data involvedWhere
Amazon Web Services (AWS)Hosts our servers, database and backups, keeps our server logs and our archive of valve readings, and delivers our pages through its CloudFront edge networkEverything in section 4Ireland (its eu-west-1 region), with a copy of each day's backup in London (eu-west-2); the CloudFront location nearest you, in Europe or North America, carries the connection to your browser
Microsoft (Microsoft 365 and Entra ID)Sends our emails from our mailbox, and runs Microsoft sign-inEmail recipients and contents; your email address when you sign inThe UK, where our Microsoft 365 data is stored; Microsoft may process some data elsewhere for support and security (section 9)
GoogleRuns Google sign-inYour email address when you sign inWorldwide, including the US
The Things IndustriesRuns the wireless network our valves useValve readings and room names, no personal dataEurope (its EU1 network)
Met OfficeWeather forecasts for the school's locationThe school's location, no personal dataUK

Wonde, which sends us your school's staff list and timetable from its MIS, works for your school, not for us: your school authorises it to share that data with us.

We don't share personal data with anyone else unless the law requires it.

9. Where it's stored

We store data on Amazon Web Services in Ireland, in its eu-west-1 region, which is in the European Economic Area. UK law recognises the EEA as protecting personal data adequately. A backup of the database is taken every day and kept for 35 days in Ireland, with a copy in London (AWS's eu-west-2 region), in the UK.

Our pages reach you through Amazon CloudFront, AWS's edge network: the location nearest you, in Europe or North America, carries the encrypted connection to your browser and keeps copies of our public files (pictures, fonts and scripts, which hold no personal data). It records each request in an access log, kept in Ireland (section 10). Its firewall (AWS WAF), which screens requests for attacks, also logs them: the address requested, the time, your IP address and browser details, never your cookies. AWS keeps that log in its US East region, the only place a CloudFront firewall can write to, under the protections described below.

Our email (Microsoft 365) is stored in the UK.

Some of our providers are based in the US or elsewhere, and may process data there. When they do, we rely on the protections UK law requires, such as the UK International Data Transfer Addendum or the UK-US data bridge.

10. How long we keep it

DataHow long we keep it
Staff list and timetableWhile your school uses Sinc Energy, kept up to date from your school's MIS every night.
Sign-in codesA code works once, for 10 minutes. We keep a scrambled record of it, with when it was sent and the IP address that asked for it, for 30 days.
Temperature feedback, fault reports and heating requests13 months, so your school can compare a heating season with the last. The IP address each was sent from is removed after 30 days.
Requests for access6 months after your school, or we, decide on it. A request nobody has decided on yet stays until it's decided. The IP address it was sent from is removed after 30 days.
Your picture, settings and last room on the teacher pageUntil you change them, or your school stops using Sinc Energy.
School console accountsUntil your school removes you, or stops using Sinc Energy.
Valve readings90 days in our database. The raw readings as the wireless network delivered them (a valve's identifier and its readings, no personal data) are archived for 3 years.
Emails we sendCopies of the emails the service sends are deleted from our sending mailbox after 12 months.
Server logsUp to 30 days. The edge network's access logs (each request's address, time, IP address and browser details, no cookies): 90 days. The firewall's log: 30 days.
Database backups35 days. Data deleted from the database stays in the backups taken before then, until they expire.
Signed-in sessions4 hours on the teacher page; on the school console, 14 days after you last used it and 30 days at most. A record of each session (when it began, was last used and ended, your IP address and a fingerprint of your browser's name) is kept 30 days after it ends. We use the fingerprint to email a school console account when it is signed in to from a browser it hasn't used before (the time, how, the browser and the IP address).
Your Microsoft or Google account's identifiersWhen you sign in with your school's Microsoft or Google account, we keep that account's identifiers (its organisation and account IDs) with your address, so another account using the same address can't sign in as you. Kept until 13 months after you last sign in that way.
Sign-in and account eventsWho signed in, when and from where; codes sent and refused; invitations, permission changes and removals; the decisions on requests. 13 months, so we can answer your school's questions about an account and spot misuse. The IP address is removed after 30 days. These, your sessions and your account identifiers are our own security records: we keep them for these periods even if your school stops using Sinc Energy.

Our server deletes what has passed these periods automatically, every night, and our hosting deletes logs, backups and archived readings as they reach theirs.

When a school stops using Sinc Energy, we delete its data within 90 days, unless the school asks us to return it first. Our own security records expire at the times above.

11. How we keep it secure

12. Cookies and browser storage

We only use cookies that are needed to sign you in and keep you signed in, so they don't need your consent. We don't use analytics or advertising cookies.

CookieWhat it's forHow long it lasts
sinc_staffKeeps you signed in to the teacher page4 hours
sinc_consoleKeeps you signed in to the school console14 days after you last used it, 30 days at most
sinc_codeTies a sign-in code to the browser that asked for it, so a code typed in anywhere else does not work11 minutes
sinc_staff_ssoKeeps a Microsoft or Google sign-in secure while it's in progress10 minutes
sinc_freshSet when a change on the school console needs a fresh sign-in, so your next Microsoft sign-in in this browser asks for your password again instead of reusing an older one30 minutes
sinc_adminKeeps Sinc Energy staff signed in to our admin dashboard12 hours
sinc_ssoKeeps a Sinc Energy staff sign-in secure while it's in progress10 minutes

Until you close the tab, the teacher page also remembers the email address you typed (sinc_staff_email) and which of its tabs you had open (sinc_staff_tab), in your browser's session storage.

The Sinc Energy apps for Android, iPhone and iPad show these same pages, so they keep the same cookies and session storage, inside the app on your phone rather than in its browser. The apps add nothing of their own: no analytics, advertising or crash reporting. On Android the app is left out of your phone's backups and transfers.

Our teacher page demo at sinc.energy/sandbox2 keeps nothing in your browser.

Our pages load their fonts, icons and scripts from our own address, not from a third-party content network, so no one but our hosting provider (section 8) sees your browser load them.

13. Your rights

You have the right to:

Your school is the controller for most of your data here, so the quickest route is usually to ask your school, for example its data protection officer. Your staff list details come from your school's MIS, so corrections are best made there. If you ask us, we'll pass your request to your school and help it respond.

For the data we control, contact us at privacy@sinc.energy. We'll reply within one month.

Deleting your account

Your Sinc Energy account comes from your school: your place on its staff list, or the school console access its admins gave you. It's the same account in the apps and on the web. To delete it, either:

Once you're removed, you can't sign in. What you sent us, such as reports and requests, and the records of your sign-ins are deleted at the times in section 10. If you want them deleted sooner, say so in your email and we'll do it with your school's agreement, as it controls most of this data (section 3); copies in our backups expire within 35 days. Deleting the app from your phone signs you out on that phone but doesn't delete your account.

14. Complaints

If you're unhappy with how your data is handled, please talk to your school or us first. To complain to us, email privacy@sinc.energy or write to the address in section 16. We'll acknowledge your complaint within 30 days, keep you told of progress, and tell you the outcome. If it's about data your school controls, we'll pass it to your school and help it answer.

You can also complain to the Information Commission (the ICO) at ico.org.uk/make-a-complaint, or by calling 0303 123 1113.

15. Changes to this policy

We'll update this policy when the way we handle personal data changes, and change the date at the top. We'll tell schools about significant changes before they take effect.

16. Contact us

Email privacy@sinc.energy, or write to Sinc Energy Ltd, 98 Cloutsham Street, Northampton, England, NN1 3LN.