Honeywell T4 Wired Programmable Thermostat T4H110A1021
- SKU
- EDDHONEYWELL09
The Honeywell Home T4 wired adjustable programmable thermostat uses standard fittings and connections, giving installers a straightforward and cost‑effective option when replacing an existing thermostat.
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The T4 Programmable Thermostat is a modern wired 7 day programmable room thermostat designed to deliver automatic time and temperature control for domestic heating systems and light commercial environments. It combines simplicity, efficiency and smart functionality, helping households save energy through its pre configured scheduling while making installation straightforward thanks to its standardised mounting design. The thermostat offers flexible scheduling options, including 7 day or 5/2 day programmes, with four or six independent time periods each day. It runs on batteries with a low power indicator and is compatible with 24-230V on/off and OpenTherm appliances such as gas boilers, combi boilers and heat pumps.
Everyday use is made easy with clear on screen text, intuitive function buttons and features like optimum start, stop and delayed start, which learns how the room heats to improve comfort and efficiency. Installation is streamlined through a simple three step process (wire, power up and test, then configure) supported by an improved wall plate with extra wiring space and an on screen heat demand icon for quick commissioning. The T4 also includes adjustable frost protection, an Away mode with custom temperature and duration, temporary overrides, automatic Summer/Winter time change, a large continuous time display and an easy access battery compartment. An optional backlight with extended illumination time adds further convenience, making the T4 a practical and user friendly choice for a wide range of heating systems.
| MPN | T4H110A1021 |
|---|---|
| Product Code | T4H110A1021 |
| Part Origin | Genuine |
| Part or Accessory? | Accessory |
| Brand | Honeywell |
| Height (mm) | 97 |
| Width (mm) | 136 |
| Depth (mm) | 28 |
| Full Weight (kG) | .5 |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
Honeywell T4 Wired Programmable Thermostat T4H110A1021
The T4 Programmable Thermostat is a modern wired 7 day programmable room thermostat designed to deliver automatic time and temperature control for domestic heating systems and light commercial environments. It combines simplicity, efficiency and smart functionality, helping households save energy through its pre configured scheduling while making installation straightforward thanks to its standardised mounting design. The thermostat offers flexible scheduling options, including 7 day or 5/2 day programmes, with four or six independent time periods each day. It runs on batteries with a low power indicator and is compatible with 24-230V on/off and OpenTherm appliances such as gas boilers, combi boilers and heat pumps.
Everyday use is made easy with clear on screen text, intuitive function buttons and features like optimum start, stop and delayed start, which learns how the room heats to improve comfort and efficiency. Installation is streamlined through a simple three step process (wire, power up and test, then configure) supported by an improved wall plate with extra wiring space and an on screen heat demand icon for quick commissioning. The T4 also includes adjustable frost protection, an Away mode with custom temperature and duration, temporary overrides, automatic Summer/Winter time change, a large continuous time display and an easy access battery compartment. An optional backlight with extended illumination time adds further convenience, making the T4 a practical and user friendly choice for a wide range of heating systems.
| MPN | T4H110A1021 |
|---|---|
| Product Code | T4H110A1021 |
| Part Origin | Genuine |
| Part or Accessory? | Accessory |
| Brand | Honeywell |
| Height (mm) | 97 |
| Width (mm) | 136 |
| Depth (mm) | 28 |
| Full Weight (kG) | .5 |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
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