The Honeywell CM920 series of wireless programmable thermostats are designed to provide temperature and time control to central heating systems in domestic and light commercial properties. The design is slim and modern to suit any style of décor and a large LCD display with one function button ensures simple programming and operation.

Radio frequency and a receiver allow the Honeywell thermostat to communicate with the heating system. The receiver is usually positioned in the most convenient location for wiring.

The CM921 has been specifically designed for use where the user has the same heating requirements each day of the week.


Features and Benefits:

  • Wireless communication between receiver box and thermostat. These are supplied pre-bound.
  • Manual, Auto, holiday and off (frost) modes.
  • Programmes are memorised even when batteries are changed.
  • Large user friendly LCD display.
  • Automatic summer/winter time changes.
  • Maximum of 6 temperature and time settings per day.
  • Boiler ‘On’ display.
  • Volt free connections.

360 Image



Techincal Drawings

£109.80 (Inc. VAT)

Order Now - Delivery From 27th Sep

Honeywell Wireless Programmable Thermostat CMT921A1042 Reviews

Add your own review
5.0/ 5
1 reviews
  • Peter Stewart
    5/ 5

    Unit arrived very quickly after I ordered it from Plumbworld. It was easily installed by the electrician from our local Heating and Plumbing company who service our Worcester Bosch Combi boiler and is working well. We have changed to a portable wireless thermostat because the fixed one in our bungalow is sited in a hallway that is exposed to the sun all day and gets much warmer than the rest of the property. We have the version that has the same settings for every day because we are retired, working families might want the 7 day timer version. It was easy to programme and is overridden by moving a slider from auto to manual when heat is required outside of the programme times. Very happy with it so far and the service from Plumbworld who, as well as delivering it very quickly, were very competitive.