The Honeywell Home T4 Wired Programmable OpenTherm Room Thermostat T4H310A3032 is a modern, easy-to-use heating control designed to provide automatic time and temperature management for domestic and light commercial heating systems. With flexible 7-day programming, an LCD screen and dedicated function buttons, it makes setting heating schedules straightforward for everyday users.
Specifically designed for use with compatible OpenTherm boilers, this programmable room thermostat supports temperature control based on changing heating demand. Its two-wire and OpenTherm connections make it suitable for compatible combination boiler installations. Energy-saving functions include Optimum Start and Holiday Mode, helping users manage their heating schedules around their routines.
The Honeywell Home T4 features a white finish, a temperature setting range of 5°C to 35°C and flexible scheduling options, including seven-day, 5+2-day and single-day schedules. Its optional backlight with an extended illumination period supports easier screen viewing and operation.
Wired OpenTherm Thermostat
7-Day Programming
Optimum Start
Holiday Mode
Honeywell Home T4 – At a Glance
Control Type
Programmable
Connection
Wired OpenTherm
Temperature Range
5°C–35°C
Applications & Compatibility
The Honeywell Home T4H310A3032 is designed for automatic time and temperature control in domestic and light commercial premises. It is specifically intended for compatible OpenTherm boilers, with two-wire and OpenTherm connections suited to supported combination boiler installations.
With one heating zone, the thermostat is suitable for installations requiring programmable room temperature control for a single heating zone. Confirm the boiler's OpenTherm support and wiring requirements before installation.
Compatibility note:
This model is specified for OpenTherm-compatible boilers. Check the manufacturer's installation instructions to confirm the correct connection terminals, power requirements and compatibility with your exact boiler before purchasing.
Key Specifications
| Product Name |
Honeywell Home T4 Wired Programmable OpenTherm Room Thermostat |
| Brand |
Honeywell Home |
| Range |
T4 |
| Manufacturer Stock Code |
T4H310A3032 |
| Category |
Heating Controls |
| Sub-Category |
Thermostats |
| Thermostat Type |
Programmable Room Thermostat (PRT) |
| Connection Type |
Wired |
| Boiler Compatibility |
OpenTherm-compatible boilers |
| Timer Cycle |
7-day programming, with 5+2-day or single-day schedules |
| Temperature Range |
5°C to 35°C |
| Screen Type |
LCD |
| Power Type |
Low-voltage bus (e.g. 24V), as listed |
| Batteries Included |
No |
| Energy-Saving Features |
Optimum Start, Holiday Mode |
| Number of Zones |
1 heating zone |
| Colour |
White |
| Dimensions (W × H × D) |
136 × 97 × 28 mm |
| Width |
136 mm |
| Height |
97 mm |
| Depth |
28 mm |
| Warranty |
1 year |
| NCB |
Yes, as listed |
Key Features & Benefits
7-Day Programmable Heating
Set heating schedules to suit different routines throughout the week, with seven-day, 5+2-day or individual-day programming options.
OpenTherm Boiler Control
Designed specifically for compatible OpenTherm boilers, allowing supported control of heating demand beyond a simple on/off signal.
Optimum Start
Helps time heating operation so the desired temperature can be reached around the scheduled start time, subject to system conditions.
Holiday Mode
Allows heating settings to be adjusted for periods away from home, helping avoid unnecessary scheduled heating during a holiday.
Clear LCD Display
An on-screen text display and dedicated function buttons make programming and everyday operation easier to follow.
Optional Backlight
The optional backlight with an extended illumination period supports screen visibility during adjustment and programming.
Who Is This Product For?
The Honeywell Home T4 wired programmable room thermostat is suitable for homeowners, landlords, heating engineers and installers looking for scheduled temperature control in domestic or light commercial premises. It is particularly relevant to compatible OpenTherm boiler installations that require a wired, single-zone programmable thermostat.
Installation & Setup
- Confirm the boiler supports OpenTherm and that the T4H310A3032 is suitable for the intended installation.
- Check the manufacturer's wiring diagram and power requirements before connecting the thermostat.
- Install and wire the thermostat in accordance with the product instructions.
- Set the current time and configure the preferred seven-day, 5+2-day or single-day heating schedule.
- Configure available functions such as Optimum Start and Holiday Mode to suit the heating routine.
- Test the thermostat and confirm that the boiler responds correctly to heating demand.
Installation should follow the manufacturer's instructions and applicable electrical regulations. Have wiring completed by a suitably qualified professional where required. Confirm the exact supply and OpenTherm connection requirements before installation.
Frequently Asked Questions
Is the Honeywell Home T4 a wired or wireless thermostat?
The T4H310A3032 is a wired programmable room thermostat designed for compatible OpenTherm heating systems.
Does this thermostat support OpenTherm?
Yes. It is specified as an OpenTherm thermostat designed to work with compatible OpenTherm boilers. Always confirm compatibility with the exact boiler model.
Can I programme different temperatures for different days?
The thermostat supports seven-day programming, with seven-day, 5+2-day or single-day schedule options as specified.
What temperature range does the Honeywell Home T4 support?
The specified temperature range is 5°C to 35°C.
What energy-saving functions are included?
The listed energy-saving features are Optimum Start and Holiday Mode. Actual energy savings depend on usage, system setup and property conditions.
Are batteries included?
No. The supplied product information states that batteries are not included. Check the manufacturer's instructions for the thermostat's exact power requirements.
What are the thermostat dimensions?
The listed dimensions are 136 mm wide, 97 mm high and 28 mm deep.
What is the warranty period?
The supplied product details list a one-year guarantee.
Why Choose the Honeywell Home T4?
- Programmable wired room temperature control for compatible OpenTherm boilers.
- Flexible seven-day, 5+2-day and single-day scheduling options.
- Optimum Start and Holiday Mode for schedule management.
- LCD screen with on-screen text and dedicated function buttons.
- Temperature settings from 5°C to 35°C.
- Compact white design measuring 136 × 97 × 28 mm.
Shop Honeywell Home Heating Controls
Choose the Honeywell Home T4H310A3032 wired programmable OpenTherm room thermostat for compatible heating installations.
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