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NodOn SIN-4-FP-21 is a Zigbee 3.0 control module for electric radiators that have a compatible pilot-wire input. It supports six pilot-wire orders: Comfort, Comfort -1°C, Comfort -2°C, Eco, Frost Protection and Stop. It also reports instantaneous power and cumulative energy when the chosen gateway exposes those measurements.

This is not a universal thermostat or a direct replacement for a radiator controller; the connected heater must support the French pilot-wire system. A compatible Zigbee gateway is required, and some ecosystems rely on community integrations. Check radiator wiring and gateway support before purchase, and use a qualified electrician for the 230 V connection.