Privacy

We sell a product whose whole point is that your data stays in your home, and this site is run the same way. The short version: no cookies, no ad trackers, no data sales, self-hosted analytics, and the only personal data we ever hold is what you type into the contact form. Last updated July 18, 2026.

Analytics

We run a self-hosted instance of Umami, an open-source, privacy-focused analytics tool, on our own server. It sets no cookies, stores no full IP addresses, does not fingerprint or follow you across other sites, and shows us only aggregates: page views, referrers, and which links get clicked. No data goes to Google Analytics or any third-party analytics service.

Contact Form

Submitting the contact form sends us your name (optional), email address, topic, and message. It's delivered to us as an email through Resend, our email delivery provider, and then kept only as ordinary correspondence in our mailbox. It's never added to a marketing list (we don't have one) and never shared or sold. Want a past message deleted? Ask through the same form and we'll delete the thread.

Purchases

Orders are processed entirely by Etsy, under Etsy's privacy policy. Serin Labs receives what's needed to fulfill your order (name, shipping address, and order contents) and never sees your payment details.

The Flash Tool

The browser flasher talks to your controller over Web Serial locally, inside your browser. Firmware binaries are fetched from GitHub; nothing about your device, network, or HVAC system is sent to us.

The Product

The controller itself reports nothing to Serin Labs, ever. It has no relationship with our servers. Once flashed, it talks only to your Mitsubishi unit and your own Home Assistant or Apple Home setup.

Your Rights

Whatever privacy law applies where you live (GDPR, CCPA, or otherwise), the practical answer is the same: we hold almost nothing about you, and you can ask to see or delete what we do hold (contact-form correspondence and order records) via the contact form.

Changes

If our practices change, this page changes with them, along with its date. We won't quietly add tracking and hope nobody reads this.