The VS20 thermostat may be used for controlling a heating zone with up to 6 TRV’s per thermostat. It can also be connected to both door / window sensors and smart plugs. All units are wirelessly connected and it is possible to set up management for both time and temperature. You can set up Min / Max temperatures for each room and the option to turn off the display on the thermostat to save battery life.

Features (VS20)

  • Three adjustable temperature settings including night setback
  • Party and holiday modes
  • Temporary and permanent overrides
  • External sensor options including cylinder thermostat when configured as a hot water timer
  • Default heating/cooling program
  • Memory backup (settings don’t need to be reset in the event of power loss)
  • Heating/cooling changeover when used with KL10RF

VS20 Thermostat

Supply 4 x AAA Alkaline batteries
RF Frequency Zigbee 2.4 Ghz
Scale 5 -35
Size (mm) W-86.5, H-86.5, D-26.5


S1 External Sensor (optional)
S2 External Sensor (optional)

The TRV10RFM is a battery-powered, mini-size thermostatic radiator valve (TRV) controller using ZigBee wireless communication. Simply replace the existing, passive head on the standard radiator valve with the TRV10RFM. You can connect up to 6 TRV’s to one VS20 thermostat used with the Universal Gateway.

Features (TRV10RFM)

  • Automatic valve adaptation
  • Easy wireless pairing
  • Manual on/off buttons
  • LED status indication
  • Buttons can be locked
  • Frost protection function
  • Open window detection function
  • Limescale protection function 
  • Optional mounting ring


Supply 2 x AA Alkaline batteries
Size (mm) W-52, H-85, D-82