Honeywell Evohome Hot Water Kit 8406H

For use in conjunction with Honeywell Evohome Thermostat Pack (Code 4512H). Hot water control kit consisting of a wireless cylinder thermostat, transceiver, optional unvented cylinder insertion sensor and an additional wireless BDR relay box to control a 2-port zone valve or 3-port diverter valve. Includes sensors for both traditional and unvented cylinders. Transceiver with 2 x 1.5V AA batteries, wireless BDR relay box, traditional cylinder strap on sensor and fixings, unvented cylinder prob