Honeywell DT4R Room Thermostat Wireless YT42WRFT20
- SKU
- EDDHONEYWELL07
Designed for broad compatibility and ready to support greener, more efficient energy systems, the YT4 Room Thermostats combine a slim, modern look with straightforward, intuitive operation. They’re simple to use, packed with features people genuinely appreciate, and deliver exactly what you and your customers expect from a well designed control—just as you envisioned.
Our Expert's Opinion
"Designed for installers but made for users!"Honeywell DT4R Room Thermostat Wireless YT42WRFT20
The YT4 room thermostats are designed to deliver precise temperature control for heating systems in homes and apartments, combining a slim, modern appearance with straightforward functionality. A large, clear LED segment display and an easy to use wake up button make everyday operation simple for all users. The range has been developed to offer everything installers and homeowners value-reliability, ease of use and broad system compatibility.
The YT4R model supports both hybrid and low carbon heating solutions, working seamlessly with energy efficient technologies such as heat pumps, zoning systems, underfloor heating and cooling devices, as well as zone valve applications. Please note it is not suitable for electric heating at 240V.
The YT4 series is compatible with 27-230V on/off appliances including gas boilers, combi boilers and heat pumps and is intended for wired, wall mounted installations. Each thermostat is paired with a receiver box designed for backward compatibility with existing Honeywell Home RF products, ensuring smooth upgrades in retrofit scenarios. Versions are also available with support for OpenTherm appliances, including both standard OpenTherm and OpenTherm Smart Power, offering enhanced efficiency and advanced boiler communication.
| MPN | YT42WRFT20 |
|---|---|
| Product Code | YT42WRFT20 |
| Part Origin | Genuine |
| Part or Accessory? | Accessory |
| Brand | Honeywell |
| Height (mm) | 101 |
| Width (mm) | 101 |
| Depth (mm) | 54 |
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 DT4R Room Thermostat Wireless YT42WRFT20
The YT4 room thermostats are designed to deliver precise temperature control for heating systems in homes and apartments, combining a slim, modern appearance with straightforward functionality. A large, clear LED segment display and an easy to use wake up button make everyday operation simple for all users. The range has been developed to offer everything installers and homeowners value-reliability, ease of use and broad system compatibility.
The YT4R model supports both hybrid and low carbon heating solutions, working seamlessly with energy efficient technologies such as heat pumps, zoning systems, underfloor heating and cooling devices, as well as zone valve applications. Please note it is not suitable for electric heating at 240V.
The YT4 series is compatible with 27-230V on/off appliances including gas boilers, combi boilers and heat pumps and is intended for wired, wall mounted installations. Each thermostat is paired with a receiver box designed for backward compatibility with existing Honeywell Home RF products, ensuring smooth upgrades in retrofit scenarios. Versions are also available with support for OpenTherm appliances, including both standard OpenTherm and OpenTherm Smart Power, offering enhanced efficiency and advanced boiler communication.
| MPN | YT42WRFT20 |
|---|---|
| Product Code | YT42WRFT20 |
| Part Origin | Genuine |
| Part or Accessory? | Accessory |
| Brand | Honeywell |
| Height (mm) | 101 |
| Width (mm) | 101 |
| Depth (mm) | 54 |
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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