Privacy Policy

Last updated: September 20, 2026

This Privacy Policy explains how ThermoSave LLC and its successors ("ThermoSave," "we," "us") collect, use, and share information when you:

  • visit thermosave.com;
  • buy a ThermoSave Smart Water Heater Controller (the "Device");
  • use the ThermoSave mobile app (the "App") and cloud service (together, the "Service").

The short version:

  • We collect what we need to ship your order, run your Device, and make ThermoSave better.
  • We do not sell your personal information.
  • Your utility has no access to your Device or your data.
  • Any future energy-program participation will be opt-in.

1. Information we collect

Information you give us

  • Order information: name, email, shipping and billing address, phone number (if provided), and order details. Card payments are processed by Stripe; we do not store full card numbers.
  • Account information: your email address, used to create your App account and log in.
  • Setup and settings: your electric utility or rate plan, peak hours to avoid, heating schedule, device names, device time zone, and other preferences you enter.
  • Communications: messages you send us, such as support, warranty, and return requests (including any photos), survey responses, and feedback.
  • Optional information: for example ZIP code, water heater type, or household size, if you give it to us to check compatibility or estimate savings.

Information collected from your Device and the App

  • Device operating data: heating status, power draw and energy use, temperature readings, mode changes (such as Heat Now or Away), button presses, schedule execution, and fault or error events.
  • Device technical data: device identifiers, firmware version, Wi-Fi signal strength, connectivity status, and the device's local timezone. The timezone is set from your phone at setup and reflects where the Device is installed, not where your phone is.
  • App usage data: which screens and features you use, app version, device type and operating system, and crash and diagnostic reports.

Information collected from our website

  • Website data: pages visited, referring site, browser and device type, and approximate location derived from IP address. This is collected through cookies and similar technologies by our website platform (Squarespace) and analytics providers.

2. How we use information

We use information to:

  • Provide the Service: process and ship orders, run your heating schedule, show your status and energy history in the App, and deliver software updates.
  • Support you: answer questions, and handle warranty claims, returns, and refunds.
  • Improve ThermoSave: analyze Device and App data to make sure you have hot water when you need it (for example, to find and prevent situations that could lead to a cold shower), learn which features are used and which need work, improve our scheduling and savings models, and develop new features.
  • Keep things safe and working: monitor Device health, diagnose faults, and protect against fraud, abuse, and security threats.
  • Communicate with you: send order, account, service, and safety notices. If you opt in, we also send product news and offers; you can unsubscribe at any time.
  • Meet legal obligations: comply with law and enforce our Terms of Service.

We may create aggregated or de-identified data that can't reasonably be linked to you, and use it for any lawful purpose. For example, we may report average savings or carbon emissions avoidance across ThermoSave homes by utility regions.

3. How we share information

We do not sell your personal information, and we do not share it for targeted (cross-context behavioral) advertising.

We share information only:

  • With service providers who work on our behalf under confidentiality obligations. These include payment processing (Stripe), our website and store (Squarespace), cloud hosting, email delivery, analytics and crash reporting, and shipping carriers (USPS).
  • With your consent or at your direction. For example, if you enroll in a future energy program (see Section 4).
  • For legal reasons: to comply with law or legal process, or to protect the rights, safety, and property of ThermoSave, our customers, or others.
  • In a business transaction: in connection with a merger, financing, acquisition, reorganization, or sale of assets. Any recipient must honor this Privacy Policy.

4. Utilities and energy programs

Your utility has no access to your Device or your data.

In the future, we may offer optional programs through utilities or energy-program partners (such as demand response) that let you save or earn more. These programs are opt-in only. Before you join, we'll tell you what data would be shared and with whom, and you'll agree to separate program terms. Nothing is shared for these programs unless you enroll, and you can leave a program at any time.

5. The ThermoSave App

Account and login. You sign in with your email address and a one-time passcode (OTP). We do not use or store passwords.

Device registration. When you claim a Device, it's linked to your account on our servers. This lets you manage the Device. Device identifiers, configuration, schedule, and timezone are stored on our servers.

Wi-Fi setup. During setup, the App sends your home Wi-Fi network name and password directly to the Device over a local connection. They are never stored by the App or sent to ThermoSave servers.

Location permission (Android only). Android requires location permission for the App to access Wi-Fi functions during setup. The App does not collect, use, or store your location.

Platforms. The App works the same way on iOS and Android. The only difference is the Android location permission described above.

6. Data retention

We keep information for as long as your account is active and as needed to provide the Service. After that, we keep it only as long as required for legal, tax, warranty, or accounting purposes, or to resolve disputes.

When you delete your account, we delete or de-identify your personal information, except where we must keep it. Order records are kept as required for tax and warranty purposes.

7. Security

We use reasonable administrative, technical, and physical safeguards to protect your information. Examples include encrypted connections between the Device, App, and our servers. No system is perfectly secure.

8. Your choices and rights

You can:

  • Access, correct, or delete your information. Delete your account and data by following instructions at thermosave.com/delete-account.
  • Unsubscribe from marketing emails using the link in any email. We'll still send order and service messages.
  • Control cookies through your browser settings.

Depending on where you live (for example California, Colorado, Virginia, and other states with privacy laws), you may have additional rights:

  • to know what personal information we collect and how we use it;
  • to get a copy of it;
  • to correct or delete it;
  • to opt out of sale, sharing, or targeted advertising (we don't do these);
  • to not be discriminated against for exercising your rights.

To make a request, email support@thermosave.com. We'll verify your request using your account email. You may use an authorized agent where the law allows. If we deny your request, you can appeal by replying to our decision.

9. Children

ThermoSave is not directed to children under 13 (or under 16 where applicable), and we don't knowingly collect their personal information.

10. Where we process data

ThermoSave is offered in the United States, and we process and store information in the United States.

11. Changes

We may update this Privacy Policy as our products change. If we make material changes, we'll notify you by email or in the App before they take effect. The "Last updated" date shows when this policy last changed.

12. Contact

ThermoSave LLC · hello@thermosave.com · 470 Noor Ave STE B #1299, South San Francisco, CA 94080, United States