Atlantic
Pass Cozytouch
The Pass Cozytouch (602251) is the io-homecontrol radio interface that retrofits an Atlantic appliance with no radio of its own. It mounts behind the unit and lets the Bridge Cozytouch, and therefore Home Assistant, see it.
Works on integrations
Protocols
This is the part that decides whether an existing heating system can be automated at all. An appliance from the connected ranges already has io-homecontrol inside; an older or entry-level one does not, and the Pass is the interface that adds it, fitted behind the appliance rather than next to the router. It does nothing on its own: a Bridge Cozytouch is still required, and it is sold separately. What the appliance then exposes to Home Assistant is set by the appliance, not by the Pass, so a radiator that only supports setpoint and mode over io will show setpoint and mode and nothing more. Worth pricing per unit early, because a house of six radiators needing six interfaces changes the shape of a quote.
Hardware availability
Atlantic changed the gateway in August 2026: CozyBox replaces the Bridge Cozytouch for radiators, towel rails, and some air-to-air heat pumps, and several current appliances need no gateway because they connect over Wi-Fi directly. Bridges stay in service on the installed base. Either way Atlantic Cozytouch is cloud only, because Home Assistant’s local API covers Somfy and Rexel gateways, so an internet outage takes Atlantic control with it. Home Assistant also warns that some Cozytouch appliances are not supported by the Overkiz platform at all, which is worth checking per model number before an install is quoted on it.
Where to buy
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