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Honeywell T4R 7 Day Wireless Programmable Thermostat

Honeywell T4R 7 Day Wireless Programmable Thermostat - T4H910RF4003
£165.33 inc VAT
RRP £207.65 You Save £42.33
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Honeywell T4R 7 Day Wireless Programmable Thermostat & Wireless Relay Box

Wireless Programmable Thermostat

This is a modern wireless 7-day Programmable Room Thermostat. It is designed to provide automatic time and temperature control of domestic systems in domestic or light commercial premises.


  • Compatible with 24-230V on/off appliances such as gas boilers, combi-boilers and zone valve
  • The T4 can be used as a temperature sensing device in an S or Y Plan system
  • Well suited to control combination boiler installations or additional zones in an S Plan Plus system
  • Wireless communication between thermostat and receiver box with 30m range
  • Pre-bound to the wireless relay box, no need to establish a binding
  • On screen text display and function buttons to ensure simplified programming and operation for all users
  • Energy saving TPI control
  • Optimum stop & start & delstartayed features that learn how the room is heated
  • Two wire, volt free connections are ideal for use with combination boilers
  • Easy to fit with a three step installation process: Wire, Power Up and Test, Configure
  • New improved wall plate with extra wiring space
  • Optional Wired external sensor available (wired versions only)
  • On screen heat demand icon makes start up testing easy
  • Simple push button access to configuration menus
  • Adjustable Frost protection
  • Away mode with specific temperature set (number of days changeable)
  • Temporary schedule override until next set point or for 1 or 2 hours
  • Schedule can be turned off – will operate as a variable setting thermostat only
  • Displayed on an extra-large LCD screen
  • Automatic Summer/Winter time change
  • 7-day programming with 7 day; 5/2 or single day schedules
  • Four or six independent time & temperature settings (default is 4)
  • Pre-configured 5/2 heating schedule
  • Battery powered (with low-power indicator)
  • Easy change battery compartment
  • Optional backlight with extended light on time period
  • Burner 'ON' symbol

Wireless Relay Box

Designed for the installer in mind, this relay box comes pre-bound to the Honeywell T4R and provides the link between the boiler and the wireless thermostat.

  • Lift up wiring bar for easy wiring
  • OpenTherm terminals as standard
  • Clear wiring labels

Product Specification

Name Honeywell T4R 7 Day Wireless Programmable Thermostat - T4H910RF4003
Product Code 161949
MPN T4H910RF4003
RRP £207.65 You Save £42.33