Watts Vision is a wireless smart home system from Watts (Watts Water Technologies, based in North Andover, Massachusetts) for controlling hydronic and electric heating and cooling room by room, plus lighting and power outlets. A touchscreen central unit with built-in Wi-Fi links the room devices to the cloud, and two apps exist: the older Watts Vision and the newer Vision+.
Room thermostats, thermostatic heads and receivers talk to the central unit over a bidirectional 868 MHz radio link, and the central unit connects to the home network over Wi-Fi and to Watts' cloud. Alexa, Google Home, Home Assistant and Homey integrations all go through that cloud, with the Vision+ account as the sign-in.
That suits households with underfloor, radiator or electric heating who want zone control from a phone and voice assistants. It is weaker for local-only control: every integration we found is cloud-based, and the older Watts Vision app and the newer Vision+ app work with different central unit versions.
Connection
868 MHz radio to a Wi-Fi central unit, then cloud
Voice assistants
Alexa and Google Home (Vision+)
Matter
Not found
Open platforms
Home Assistant, Homey (official Watts apps)
What can be connected
Heating and cooling Underfloor, radiator and electric heating with thermostats, thermostatic heads and receivers
Switching Lighting and power outlets, up to 50 lighting devices and 25 plugs on one central unit
Monitoring Temperature history, energy consumption, open-window detection and water leak alerts
The newer app, published by Watts Water Technologies. It covers schedules, temperature history, water leak alerts and remote switching, supports nine languages, and holds the Alexa and Google Home links under Settings > Integrations. Its version notes mention a Home Assistant button in Settings.
The original app for the Vision system, covering hydronic and electric underfloor and radiator heating, lighting and other electrical appliances, with heating programmes, energy consumption and weather forecasts. Watts' central unit page ties each app to a different product code printed on the unit, so the two apps are not interchangeable. The Android listing was last updated on 28 August 2026 and shows no mention of Vision+.
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
The BT-CT02-RF and BT-CT03-RF central units have Wi-Fi integrated in the touchscreen unit, which gives external access over the internet. The Watts Vision page describes the app as using secure cloud connectivity.
Both central unit pages give the RF frequency as 868 MHz with bidirectional communication, and neither names a protocol. One central unit manages up to 50 zones.
Zigbee is not mentioned on the Watts central unit or system pages we opened, so we could not confirm it, and the same goes for Bluetooth, Z-Wave and Thread.
Watts support documents linking Vision+ to Google Home from Settings > Integrations. Heat mode accepts 5 to 30 degrees C, Auto follows the Vision+ schedule, and Off stops heating until another mode is chosen. The page lists no specific device models and warns of minor differences from the app.
Watts support documents the Watts Vision+ skill, linked from Settings > Integrations > Amazon Alexa. Heat and Eco accept 5 to 30 degrees C and Alexa calls Eco Energy Saver. Alexa support was added to the app in version 1.3.0.
Not mentioned on the Watts, App Store, Home Assistant or Homey pages we opened. We did not search for a Homebridge plugin, so a community route is unconfirmed.
Watts Vision + is a built-in integration with Platinum quality rating, introduced in Home Assistant 2026.1. It creates a climate entity per thermostat and switch entities, and supports gateways BT-CT03-RF and BT-ST03-RF. It is cloud polling every 30 seconds through the official Vision+ cloud API with OAuth2 sign-in, so it is not local. We could not confirm whether Watts itself maintains it, though the Vision+ app has a Home Assistant button. Older Watts Vision systems are not covered.
The Watts Vision+ app is listed as Watts Water Technologies Official. It supports Smart Plug, Thermostat and TRV, lists Homey Cloud, Pro, Pro mini and Self-Hosted Server, and needs Homey v12.4.0 or newer, but every device type is cloud-based and says Homey Bridge is required. A separate community app by an independent developer targets Watts Vision Legacy with experimental Vision+ support and states it is not affiliated with Watts.
No Watts service found, but we did not open IFTTT's own page, so this is unconfirmed.
Searched, no source
Developer or local API
Unconfirmed
Home Assistant says its integration uses the official Watts Vision + cloud API, but we found no public developer portal. A community AppDaemon script from a Home Assistant forum thread read the older Watts cloud API, with the last activity shown in November 2021. We found no local API.
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 Watts Vision
Does Watts Vision support Matter?
Not that we could find. No Matter support is mentioned on Watts' pages or in the Home Assistant and Homey listings we opened. We did not find a Watts announcement.
Does Watts Vision work with Alexa?
Yes, officially. Watts support documents the Watts Vision+ skill, linked from Settings > Integrations > Amazon Alexa. Heat and Eco accept 5 to 30 degrees C and Alexa calls Eco Energy Saver. Alexa support was added to the app in version 1.3.0.
Does Watts Vision work with Google Home?
Yes, officially. Watts support documents linking Vision+ to Google Home from Settings > Integrations. Heat mode accepts 5 to 30 degrees C, Auto follows the Vision+ schedule, and Off stops heating until another mode is chosen. The page lists no specific device models and warns of minor differences from the app.
Does Watts Vision work with Apple Home (HomeKit)?
Not that we could find. Not mentioned on the Watts, App Store, Home Assistant or Homey pages we opened. We did not search for a Homebridge plugin, so a community route is unconfirmed.
Does Watts Vision work with Home Assistant?
Yes. Watts Vision + is a built-in integration with Platinum quality rating, introduced in Home Assistant 2026.1. It creates a climate entity per thermostat and switch entities, and supports gateways BT-CT03-RF and BT-ST03-RF. It is cloud polling every 30 seconds through the official Vision+ cloud API with OAuth2 sign-in, so it is not local. We could not confirm whether Watts itself maintains it, though the Vision+ app has a Home Assistant button. Older Watts Vision systems are not covered.
Does Watts Vision work with SmartThings?
Not that we could find. No integration found in our searches or on the Watts pages we opened.
Does Watts Vision work with Homey?
Yes, officially. The Watts Vision+ app is listed as Watts Water Technologies Official. It supports Smart Plug, Thermostat and TRV, lists Homey Cloud, Pro, Pro mini and Self-Hosted Server, and needs Homey v12.4.0 or newer, but every device type is cloud-based and says Homey Bridge is required. A separate community app by an independent developer targets Watts Vision Legacy with experimental Vision+ support and states it is not affiliated with Watts.
Does Watts Vision work with Hubitat?
Not that we could find. No driver found in our searches.
Answers come from the sourced table above. See how Watts Vision compares with all brands on the smart home brand statistics page.