Mill Invisible Panel Heater Gen 3 900W

28 October 2026

Device Info

Manufacturer:

Model:

Protocol:

Thread Role:

Vendor ID:

Product ID:

Certificate ID:

Date Certified:

Matter Version:

Device Type:

Mill

PA900WIFI3

Bluetooth, Wi-Fi

N/A

0x1327

0x1BD4

CSA2465BMAT44302-24

21.10.2024

1.3

Space Heater, Thermostat

Available from

Amazon.com

Amazon.co.uk

Amazon.ca

Amazon.de

Amazon.nl

Amazon.fr

Amazon.it

Amazon.es

Amazon.se

Website

Notes and annotations

This is a WiFi Gen 3 panel heater, replaced by the Gen 4 range in 2025 but still listed by some retailers.

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Matter Protocol

Matter over Wi-Fi

The Mill Invisible Panel Heater Gen 3 900W from Mill connects to your smart home over Wi-Fi. It joins your existing network directly, without a Thread Border Router or extra hub, and your Matter controller reaches it through your home router.

Wi-Fi Band

Most Matter Wi-Fi devices only connect on 2.4 GHz. If your router combines 2.4 and 5 GHz under one SSID, split them to avoid issues.

Same Network

Your phone, your controller and the device must be on the same network. Guest networks and separate VLANs can block Matter.

Power Use

Wi-Fi uses more power than Thread, so most Matter over Wi-Fi devices run on mains power instead of batteries.

Every Matter device needs a Matter controller, like a smart hub, display or speaker. See all Matter hubs →

Matter Version

Matter 1.3

The Mill Invisible Panel Heater Gen 3 900W is certified on Matter 1.3, released in May 2024. It added energy reporting for any device, plus EV chargers, water valves, leak and freeze sensors, ovens, cooktops, microwaves, extractor hoods and dryers. Scenes also became part of the standard.

Frequently Asked Questions

Does the Mill Invisible Panel Heater Gen 3 900W need a smart hub?

Yes, but only a Matter controller from your platform, not a separate bridge. The Mill Invisible Panel Heater Gen 3 900W connects straight to your home network. The controller can be an Apple home hub, a Google Nest speaker, an Amazon Echo or Home Assistant.

Does the Mill Invisible Panel Heater Gen 3 900W work without internet?

Yes. Matter runs on your local network, so the Mill Invisible Panel Heater Gen 3 900W keeps working when your internet goes down. Remote access, voice assistants and some Mill cloud features may still need a working connection.

Does the Mill Invisible Panel Heater Gen 3 900W work with Apple Home, Google Home, Alexa and Home Assistant?

Yes. The Mill Invisible Panel Heater Gen 3 900W is Matter certified, so it works with Apple Home, Google Home, Amazon Alexa, Samsung SmartThings and Home Assistant, as long as the platform supports Space Heater, Thermostat devices. Support for newer device types can differ per platform.

Do I need the Mill app to use the Mill Invisible Panel Heater Gen 3 900W?

No. Any Matter hub can set up and control the Mill Invisible Panel Heater Gen 3 900W without the Mill app. Some advanced features may not be part of Matter yet, so settings like firmware updates or special modes can still require the Mill app.

How do I set up the Mill Invisible Panel Heater Gen 3 900W?

Open your smart home app, choose to add a device and scan the Matter QR code on the Mill Invisible Panel Heater Gen 3 900W or its packaging. You can also type in the 11-digit Matter code instead. The app guides you through the rest. Keep the code safe, you need it again after a reset.