Delonghi Dragon-4 TRD4 1025T Oil Filled Radiator with Timer, 2.5 KW, White

I’m using this heater in a glass conservatory with a floor space of approximately 24 square metres. Over Christmas 2025, the heater proved to be more than sufficient, allowing us to use the space comfortably throughout the day and into the evening. I now operate it using a smart plug, and it takes around 20 minutes to warm the area effectively. It’s a great little heater — I originally thought I might need two units, but one has been providing ample heat on its own. Very pleased with the performance.

I bought a Delonghi Dragon 4 a year ago, so I’ve had nearly 2 winters to try it out. I must say it is an outstanding oil filled radiator. I pop it on medium heat in a 15ft x 10ft room and it heats up within 10 minutes and stays on for 10 hours per day and never had any issues with it. I’ve also used it in a much larger area and it is very effective, reliable and efficient to run too, it hardly affects my electric meter. It’s a good solid radiator, made very well but then it is De’Longhi! I would recommend this radiator.

A good and sturdy radiator. It heats a small room (approximately 4m x 9m X 2.5m) in about 5 minutes. It retains heat after being switched off much more so than others I have owned. Good for an office room or even a garage. It's quite tall (about 65cm) and reassuringly heavy. It's designed to convect some of the heat out from a vent on the top which really helps the room - warming process. Oh,...the wheels on the bottom come prefitted and are fine but maybe a bit of a weak spot of you're moving it around frequently on rough services.

Great heater, however arrived with large dent on the side.

this was dearer than other units we could have bought but it is very well made with a great finish - heat output is high e,g we use it for an unheated double bedroom with a 5 window bay and on number one setting it easily takes the chill out of the room - on the highest setting it easily heats the room almost to hot - very stable with some weight to the unit cats or a medium size dog won't knock it over and the fins are protected from contact from tiny fingers All in all we are very happy we paid the extra as it ticks all the boxes

I read many reviews including negative as well as positive reviews before deciding to buy this heater. Stories of the heater stinking, creaking and groaning, loud timer ticking, fiddly switch to change from manual operation to timer, over sensitive thermostat control, manual and not electronic timer, short mains lead being a problem as you are not supposed to use this with an extension cable. Sounds bad I know, but before you decide, let me tell you of my experience. Some reviewers had complained of damage to packaging and the heater itself on delivery. Mine arrived on time and in perfect condition. I immediately set in up near the open conservatory doors to run it for a minimum of two hours on highest setting as per instructions to burn off the “new” smell. I actually ran it for three hours. It did smell a bit during this procedure. Because of the short power lead, I had to use an extension lead to do this. Now the manufacturers have put a warning NOT to use an extension lead. No need to worry if you have the right extension. If you buy a generic one at a supermarket or DIY store for a few pounds, these are often (not always) rated at about 10.5 amps. The 2.5kw current draw on this heater is about 10.5 amps. A bit too near the limit for my liking. Simple answer is, buy an extension you know is rated at a genuine 13 amps. So I bought this one https://www.amazon.co.uk/Masterplug-EXS1342B-4-Gang-Permaplug-Extension/dp/B0083GLO0I/ref=sr_1_2?ie=UTF8&qid=1514650084&sr=8-2&keywords=2m+heavy+duty+extension+lead OK it’s a tad more expensive than a generic supermarket ones, but well worth the little extra to get the flexibility. It is wired using 1.25mm cable so no problem on current draw. When the heater is plugged in to this extension along with my TV, sound bar and lamp the total current draw is approximately 2.7kw, I left everything switched on (heater on full) for three hours, heater lead was cool, extension lead was cool, heater and extension lead plugs were cool. So, there is no problem using an extension lead if it is the right one for the job. As for the heater itself, well after burning off the new smell, I have found it heats the room I wanted to heat fantastically. No bad smells, no creaking or groaning, no loud timer clicking, (I THINK I heard it when I turned the TV off and sat in silence, not sure though) The switch to turn from manual to timer operation is small, but easy to operate. The thermostat itself is a tad sensitive, the lights to show it is heating do cycle on and off quite regularly, but that is the thermostats purpose, to maintain a constant temperature, just ignore it once you have got the room to your desired temperature. The thermostat is calibrated from zero to six, I set it at just below two and it heats my small 3.3m x 3m den perfectly. As for the manual timer, I think this is an advantage over an electronic one. An electronic one will have a tiny PCB and LCD, both mounted on to something designed to throw out a lot of heat. This amount of heating and cooling could POSSIBLY cause premature failure of an electronic timer. The manual timer should be more robust. There have been quite a few negative reviews about this particular heater, I am not saying that people have not experienced some problems, but I think there was some pickiness going on there, especially relation to the manual/timer switch. This was bought to replace a cheap heater from a Chinese brand, the difference is like night and day, or lukewarm and hot. All in all, this is a fantastic heater and I would recommend it to everyone that needs such a heater.

Wow where do I start.... For the past few days it has had a burning smell. Then in the middle of the night I woke up from a strong burning smell AND THE PLUG WAS ON FIRE!!!! For some reason the fuse didn't cut out and you can actually see a burn hole from around that area. I simply cant imagine what would have happened if I hadnt woken up!!!! I've had it over a year so no refund!!!!

Best radiator we have ever had really does heat the room up

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افضل دفاية مرت علي بحياتي ، تدفي بشكل مرعب ، تنفع للغرف الكبيره او حتى الصالات (متوسطة الحجم) ميزتها انها تدف الهوا فوق فينتشر بالغرفه اسرع ، بحدود ١٥دقيقه تروح درجة الغرفه من ١٢ الى ٢٥ وتبقى دافيه حتا يوم تطفيها. ولها خاصية تعين درجة حراره ما تتعداها او تقل عنها(درجة حرارة الغرف،الدفايه فيها حساسات لها) صح سعرها غالي ، لكن الجوده حقتها ماله مثيل انصح تشريها من محلهم اكثر من امازون لان امازون ممكن يجيك الكرتون مضروب والدفايه مكسره شوي. الدرجة بالخارج ٤ وبالداخل ٢٣.٣