De'Longhi Dragon 4 TRD40820T Oil Filled Radiator (White)
Product description
The essentials
If you want steady warmth without fiddling, an oil filled radiator like the De'Longhi Dragon 4 TRD40820T is built for that. It’s a white, column-style heater with an enhanced chimney effect designed to move hot air through the vents for effective room heating. On paper, that means less “dead” time between heating cycles and a more even feel around the space.
This model sits in the practical end of the market: a 2 kW heat output with three heat settings, plus a thermostat so you can set a target temperature rather than running it constantly. There’s also an anti-frost device and a 24 hour mechanical timer, which is particularly useful if you’re looking to maintain a bit of warmth in a spare room or keep a room from getting too cold overnight.
Key points
It’s a straightforward, everyday radiator rather than a gadget. The enhanced chimney effect is the headline feature here, and it’s meant to help accelerate hot air through vents to improve how quickly the heat circulates. With three heat levels, you can match it to how mild or chilly the room feels, and the thermostat gives you more control than single-setting heaters.
The design is also meant to be easy to live with: a bright white finish, pre-assembled wheels and a carry handle. In practice, that’s often the difference between using a heater properly (moving it where you need it) and leaving it in one place because it’s a faff.
Worth noting: 2 kW is a solid figure for many rooms, but it’s not guaranteed to be enough for very large spaces or properties with poor insulation. If you need rapid heat for a big open-plan area, this may end up working harder than you’d like.
What to know before you buy
You should check the size and heating needs of the room you’re targeting. The radiator is 44.0 x 16.0 x 65.0 cm (W x D x H), so it’s quite narrow and tall—usually a good footprint if floor space is limited, but you’ll still want to make sure it fits where you plan to park it.
Also, because this is a mechanical timer model with a thermostat, you’ll likely get the most benefit if you’re comfortable with setting a schedule and temperature level. If you’re expecting app control or very granular programming, this setup won’t match that kind of convenience.
There’s a thermostat and an anti-frost device, so it’s designed not to just “heat when you remember”, but also to help prevent the room dropping too far in colder spells.
Tech specs
- Type: Oil filled radiator
- Heat output: 2 kW
- Heat settings: 3
- Rated voltage/Frequency (V~Hz): 230~50
- Timer: 24 hr mechanical timer
- Dimensions (wxdxh cm): 44.0 x 16.0 x 65.0
Where it shines in everyday use
Imagine you come home to a cold living room in the evening. You set the thermostat to your preferred comfort level, choose one of the three heat settings, and let it stabilise. The “chimney effect” is there to push hot air through the vents more effectively, so you should notice heat circulating rather than just warming the immediate area.
If you work from home or have a room you use mostly at certain times, the 24 hour mechanical timer makes it easier to have warmth when you need it and avoid unnecessary runtime.
Pros, cons and who it suits
Pros you’ll likely appreciate day to day: - 2 kW output with three heat settings, so it’s not either on or off - Thermostat control for maintaining comfort - Anti-frost device and a 24 hr mechanical timer for predictable use - Wheels and carry handle make it genuinely moveable - White finish and an unobtrusive look for most rooms
Potential limitations: - It’s still an oil filled radiator, so it’s best thought of as steady heat rather than instant blast heating - 2 kW may feel more like a medium-room solution than a whole-house answer
It makes sense if you’re after a dependable radiator for a bedroom, living room, conservatory-style space (where appropriate), or a room you want to keep comfortably warm on a schedule.
It’s not the best match if you need ultra-fast heat-up for a large, open area, or if you want “smart” control beyond the thermostat and mechanical timer.
Is it worth it?
Buying it makes sense if you want a moveable oil filled radiator with thermostat control, three heat settings, and a 24 hr mechanical timer—especially if you’re trying to manage warmth at certain times of day or prevent a room getting too cold. The enhanced chimney effect is a sensible feature for more effective hot air movement, and the wheels plus carry handle are exactly the sort of practical touches that get used.
You may want to skip it if your space is very large, poorly insulated, or you’re expecting quick, high-powered heat for big open-plan rooms. In those cases, you’d probably be better off looking at options with greater heating capacity or a different approach to heating.
Mini FAQ
How many heat settings does the TRD40820T have?
It has three heat settings, alongside a thermostat to help maintain your chosen temperature.
Does it include a timer?
Yes, it includes a 24 hr mechanical timer for scheduled use.
Is it designed to prevent freezing in cold rooms?
It includes an anti-frost device, which is intended to help protect against the room getting too cold.
What are the key dimensions?
The dimensions are 44.0 x 16.0 x 65.0 cm (w x d x h), so it’s relatively narrow on the floor.
Where should you place it?
Because it has wheels and a carry handle, it’s intended to be moved between rooms as needed—just make sure it fits your available floor space and is positioned safely in the area you’re heating.