Wireless Relay Box (BDR91 Replacement – Replaces all Pre-2021 Honeywell BDR91)

This Wireless Relay Box is a suitable replacement for the BDR91A and pre-2021 BDR91T (without house symbol on front) Wireless Relay Box made by Honeywell. This product works with Honeywell Home evohome, CMS927, CMS921, CMS727, CMS721, T87RF, DTS92E & HCW80 wireless controls made by Honeywell Home (Resideo).

This Wireless Relay Box transmits on 868MHz using Rameses 2 protocol and is able to switch on and off central heating components with 230v or volt free switching (max current 5A). This Wireless Relay Box will not work with a Heat Pump and instead you will need a Post-2021 BDR91T1004 with the house symbol on the front cover of the BDR91.