The Honeywell T4R Wireless Programmable Room Thermostat is a modern heating control solution designed to provide automatic time and temperature control for domestic and light commercial heating systems. With wireless communication between the thermostat and receiver box, it offers flexible installation and reliable performance.Ideal for gas boilers, combi boilers, and zone valve applications, the T4R can also be used as a temperature sensing device in S-Plan or Y-Plan systems. It is particularly well suited for combination boiler installations or additional zones in an S-Plan Plus system.The thermostat and receiver are pre-bound from the factory, meaning installation is quick and straightforward. Once wired and powered, the system is ready for  configuration without the need for additional pairing. A large LCD display with on-screen text ensures simple programming and easy everyday use.

Key Features :

• Wireless 7-day programmable room thermostat

• Compatible with 24–230V on/off appliances including gas boilers, combi boilers, and zone valves

• Suitable for S-Plan and Y-Plan systems

• Ideal for combination boilers or additional zones in S-Plan Plus systems

• Wireless communication between thermostat and receiver with up to 30m range

• Pre-bound thermostat and relay box for quick installation

• Battery powered thermostat with low-battery indicator

• Easy-access battery compartment

• Optional backlight with extended illumination time

• Burner “ON” indicator symbol

• Manufacturer warranty: 1 year

Additional Features :

• Large LCD screen with on-screen text for simple programming

• Energy-saving TPI control for improved efficiency

• Optimum Start & Stop learns how quickly the room heats up

• Two-wire volt-free connections, ideal for combi boilers

• Quick 3-step installation: Wire → Power Up → Test & Configure

• Improved wall plate with extra wiring space

• On-screen heat demand icon for easy start-up testing

• Push-button configuration menus for simple setup

• Adjustable frost protection

• Away mode with adjustable duration and temperature setting

• Temporary schedule override until next set point or for 1–2 hours

• Can operate as a manual variable thermostat if scheduling is disabled

• Automatic Summer/Winter time change

• 7-day programming options: 7-day, 5/2-day, or 1-day schedule

• Four or six independent time & temperature settings per day

• Pre-configured 5/2 heating schedule