The Honeywell Home T3 Wired Programmable Thermostat is a modern, easy-to-use room thermostat that gives automatic time and temperature control of your central heating. Set different temperatures for different times of the day and let the thermostat do the rest, helping you stay comfortable and save energy.
It is designed as a simple upgrade for an existing wired room thermostat, using the old wiring. A wall plate is included, and the large backlit screen with five buttons makes programming quick and simple.
Key Features
- 7 day, 5/2 day or daily scheduling with a pre-set programme
- Up to 4 time periods and temperatures per day, with copy-day feature
- Temperature range 5°C to 35°C
- Large backlit screen showing set and room temperature
- Frost protection at 5°C when switched off
- 1 hour timed override
- Automatic daylight saving time change
- Keypad lock and min/max set point limits
- Alert messages to help with fault finding
- Battery powered (2 x AA) – about 2 years battery life
Compatibility
Compatible with 24–230V on/off heating appliances, including gas boilers, combi boilers and heat pumps. Also works with zone valve systems. Not suitable for electric heating.
Specifications
| Brand | Honeywell Home (Resideo) |
| Model | T3 Wired – T3H110A |
| Type | Wired Programmable Room Thermostat |
| Programme | 7 day / 5+2 day / daily |
| Temperature Range | 5°C – 35°C |
| Power Supply | 2 x AA alkaline batteries |
| Switching Rating | 5A resistive, 3A inductive |
| Dimensions | 136 x 98 x 62 mm (W x H x D) |
| IP Rating | IP30 |
| Colour | White |
Installation
Should be installed by a qualified electrician or heating engineer. Fit about 1.5 metres from the floor, away from direct sunlight, radiators and draughts.





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