The Honeywell BDR91A1000 evohome Wireless Relay Box is a white plastic heating control unit that can be surface-mounted. It features a wireless wire configuration and is compatible with universal smart home systems. This unit includes a remote control, Wi-Fi control, and push-button control style. With a voltage of 230V, this unit is designed by the reputable brand Honeywell and offers convenient wireless features for easy heating control. From working system - Just upgraded to a Combi so don’t need.
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