Mill is a Norwegian heating brand, published in app stores as Mill International AS, that makes Wi-Fi panel heaters, portable and oil heaters, floor heating thermostats and smart plugs, plus a heat pump, air purifiers and a climate sensor. Devices are controlled from the Mill Norway app, and newer models can also join Matter ecosystems.
Mill's heaters and plugs connect over Wi-Fi to Mill's cloud and the Mill Norway app. Generation 3 devices also run a local HTTP server with a documented REST API, and some newer products add Zigbee. A Matter update for selected Wi-Fi models lets them work with Alexa, Google Home, Apple Home and SmartThings, but the sources we read say a device switched to Matter stops using Mill's cloud and the Mill app.
That suits people who want electric heating they can fold into Home Assistant, Homey or a Matter ecosystem, with a local option on Generation 3. It is weaker if you want Mill's own app features, such as schedules and remote control, and a Matter voice setup at the same time, because the sources describe them as either/or.
Connection
Wi-Fi through Mill's cloud; local API on Gen 3; Zigbee on some Gen 4 products
Voice assistants
Alexa, Google Home and Apple Home through Matter
Matter
Yes, on selected Wi-Fi models
Open platforms
Home Assistant, Homey, openHAB and a local REST API
What can be connected
Heating Wi-Fi panel heaters (Gen 2 to Gen 4), portable heaters, oil heaters and a heat pump
Floor heating and controls Smart floor thermostats in Wi-Fi and Zigbee versions
Plugs, air and sensing Wi-Fi sockets (Gen 2 to Gen 4), Silent Pro air purifiers and the Mill Sense climate sensor
The main app for Mill's Wi-Fi devices. It offers weekly schedules with Comfort, Sleep, Away and Off modes, energy insights, multi-home support, vacation mode, household sharing, cooling control and timers. Its listing names Tibber, Homey Pro and Homey Bridge, Home Assistant, Matter on select models and a local REST API. Published by Mill International AS. The Google Play link is built from the package name found in search results and was not opened.
Official supported by the brandCommunity built by someone elseNot found searched, nothing foundUnconfirmed sources conflict or could not be opened
Platform
Status
What it means
Sources
Connection
Wi-Fi
Yes
Mill's app listing and its Australian site describe Wi-Fi heaters controlled from the Mill Norway app. Generation 3 heaters also expose a local HTTP server, and the device configuration decides whether the local API runs with or without cloud access. We found no Mill page giving a Wi-Fi band.
Homey's Mill app lists a Gen 4 Wi-Fi panel heater and a smart floor thermostat as Zigbee devices, and Mill's founders told Homey the range includes Zigbee 3.0. We found no Mill page that explains which Zigbee coordinator or hub is needed.
The Mill Wi-Fi Panel Heater Gen3 was certified on 21 October 2024 against Matter 1.3, over Wi-Fi, and is listed as a thermostat. Matter Alpha reports a firmware release on 27 November 2024 for the Gen 3 panel heater and the Smart WiFi Plug, activated through an Activate Matter option in version 5.0 or later of the Mill Norway app. Once activated, the device no longer connects to Mill's cloud, so remote control moves to the ecosystem app. Mill's app listing says Matter is for select models. No bridge or controller role is mentioned.
Reached through Matter. Matter Alpha and a German retailer's article both name Google Home as a supported ecosystem for Mill heaters. Mill's app listing does not mention Google, and we could not confirm a separate cloud-to-cloud Google link for older models.
Reached through Matter, with Alexa named as supported by Matter Alpha and the German article. Mill's app listing does not mention Alexa, and we could not confirm an Alexa skill for older Mill models.
Reached through Matter. Apple Home is named as supported by both articles. The German article notes that schedules and vacation mode from the Mill app are not available once a heater runs in a Matter system, and that parallel operation is not possible.
Matter Alpha lists SmartThings among the Matter ecosystems for the Mill Wi-Fi heaters and plug. We found no separate SmartThings integration from Mill.
A built-in integration maintained by the Home Assistant project, not by Mill. It works through Mill's cloud or locally, and local access is limited to Generation 3 heaters. The IoT class is local polling, and it adds an action to set away, comfort and sleep temperatures for a room. Mill's app listing also mentions Home Assistant.
Mill International AS publishes an app marked official in the Homey store. It lists Homey Cloud, Homey Pro, Homey Pro mini and Homey Self-Hosted Server, and covers 19 devices from panel and portable heaters to floor thermostats, sockets, a heat pump, air purifiers and the Mill Sense sensor. Most devices are marked as needing a Homey Bridge and most use cloud control. Matter is handled separately through Homey's own Matter support.
The Millheat binding is in openHAB's add-on list and is cloud-based, covering Wi-Fi heaters and the Wi-Fi socket. It does not use the LAN. A separate community Mill LAN binding by a forum member targets Generation 3 devices locally and is not confirmed as part of the official list.
Mill International AS publishes a Generation 3 REST API on GitHub. Panel, convection and oil heaters and Wi-Fi sockets serve JSON over HTTP, with endpoints for status, temperatures, modes, locks, programs, power limits and firmware updates. An optional API key switches the device to HTTPS with a self-signed certificate. Home Assistant's local mode is built on the same local access.
Checked 11 November 2026 against the brand's own pages, app store listings and each project's own page. “Not found” means we searched and found nothing, not that it is impossible. Compatibility changes often. Spot an error? Tell us and we will fix it.
Common questions about Mill
Does Mill support Matter?
Yes. The Mill Wi-Fi Panel Heater Gen3 was certified on 21 October 2024 against Matter 1.3, over Wi-Fi, and is listed as a thermostat. Matter Alpha reports a firmware release on 27 November 2024 for the Gen 3 panel heater and the Smart WiFi Plug, activated through an Activate Matter option in version 5.0 or later of the Mill Norway app. Once activated, the device no longer connects to Mill's cloud, so remote control moves to the ecosystem app. Mill's app listing says Matter is for select models. No bridge or controller role is mentioned.
Does Mill work with Alexa?
Yes. Reached through Matter, with Alexa named as supported by Matter Alpha and the German article. Mill's app listing does not mention Alexa, and we could not confirm an Alexa skill for older Mill models.
Does Mill work with Google Home?
Yes. Reached through Matter. Matter Alpha and a German retailer's article both name Google Home as a supported ecosystem for Mill heaters. Mill's app listing does not mention Google, and we could not confirm a separate cloud-to-cloud Google link for older models.
Does Mill work with Apple Home (HomeKit)?
Yes. Reached through Matter. Apple Home is named as supported by both articles. The German article notes that schedules and vacation mode from the Mill app are not available once a heater runs in a Matter system, and that parallel operation is not possible.
Does Mill work with Home Assistant?
Yes. A built-in integration maintained by the Home Assistant project, not by Mill. It works through Mill's cloud or locally, and local access is limited to Generation 3 heaters. The IoT class is local polling, and it adds an action to set away, comfort and sleep temperatures for a room. Mill's app listing also mentions Home Assistant.
Does Mill work with SmartThings?
Yes. Matter Alpha lists SmartThings among the Matter ecosystems for the Mill Wi-Fi heaters and plug. We found no separate SmartThings integration from Mill.
Does Mill work with Homey?
Yes, officially. Mill International AS publishes an app marked official in the Homey store. It lists Homey Cloud, Homey Pro, Homey Pro mini and Homey Self-Hosted Server, and covers 19 devices from panel and portable heaters to floor thermostats, sockets, a heat pump, air purifiers and the Mill Sense sensor. Most devices are marked as needing a Homey Bridge and most use cloud control. Matter is handled separately through Homey's own Matter support.
Does Mill work with Hubitat?
Unconfirmed. We found no Hubitat driver in the searches we ran, but did not search Hubitat's own pages.
Answers come from the sourced table above. See how Mill compares with all brands on the smart home brand statistics page.