They are sold individually. It features frost protection, room and remote sensor technology, and a round thermostat shape for easy installation on radiator-mounted valves.
Honeywell Evohome HR92UK Wireless Multizone Radiator TRV
Honeywell Home HR92UK Evohome Wireless Radiator Zoning Kit, White
Honeywell Evohome HR92 Wireless Radiator Controller / Smart TRV Head
Honeywell evohome Smart TRV HR92 (Faulty)
