6 best oil-filled radiators to boost your cosiness when temperatures drop — tried and tested options for every budget and room size
We've tested the best oil-filled radiators from De'Longhi, Pro Breeze and more.
The best oil-filled radiators can be a great addition to your home come winter. Not only are they an ideal accompaniment to your central heating, they distribute heat evenly, have impressive heat output and offer really good heat retention.
If you decide on this type of electric heater, with so many different makes and models available, it can be really difficult to know which will suit your home the best and to determine which are worth your money. That's where I come in. Alongside a team of Ideal Home reviewers, I have tested these oil-filled radiators in a real home environment (and over the colder months) to see how they perform, how easy they are to use and whether they offer good value for money.
Whatever your budget, you'll find the right oil-filled radiator for your needs on this list.
The quick list
Short on time? This quick list is an overview of the very best oil-filled radiators I've tried and tested. You'll find more detailed information on each oil-filled radiator and why we recommend it if you keep scrolling.
Best overall
An attractive design, fairly easy-to-use controls, minimal assembly, and powerful performance combined with a relatively affordable price point mean we rate the Pro Breeze 2500W Radiator as the best oil-filled radiator overall. It makes fast work of warming a large space, with three temperature settings, a thermostat and a timer to manage the heat output.
Budget buy
The cheapest oil-filled radiator in our round-up, this mini heater is compact, lightweight, and easily portable. It only offers one 800W heat setting, but as long as you only need to heat a small area, it can do the job. The lower wattage also means lower energy usage, plus, it's super easy to use, with only an on/off button and a simple min/max thermostat to operate. And, you can choose from a black or white finish.
Best for large rooms
We couldn't fault the De’Longhi Dragon 4 on performance, with its powerful 2500W heat output making short work of warming large and draughty rooms up to 50m2. Plus, it delivers slightly better functionality than the Pro Breeze 2500W radiator. That said, it's large, heavy, and almost twice the price. However, its 10-year manufacturer's warranty might tempt you to part with your cash.
Best smart oil-filled radiator
If you're looking for an oil-filled radiator with both style and substance, this Duux model is as sleek as you can get. It offers 2000W of heat output, which makes it suitable for heating spaces up to 30m² effectively and efficiently. As well as looking good, you can also control it from your phone via the Duux app.
Best for small rooms
If you only have a small space to heat, then the 500W De'Longhi TRNS0505M will be all you need. Affordable to run, it's small, compact, lightweight, and very easy to use. Plus, there's zero self-assembly required making this heater ready to use straight out of the box.
Best value for money
Like the other 2500W oil-filled radiators in our round-up, this is a powerful heater that can warm up large spaces quickly. While it was more fiddly to assemble than the 2500W Pro Breeze and De'Longhi models at the top of this list; its power output and price point mean it's great value for money.
Best oil-filled radiators 2026
Best oil-filled radiator overall
When we tested this Pro Breeze oil-filled radiator, we liked how contemporary the design felt compared to other oil-filled radiators on the market, and like that it comes in both black and white. There is some assembly to do with this radiator, but it's minimal. It took our tester, Rachel, under five minutes, although at 8.3kg in weight, you do need a little strength and dexterity.
The large stainless steel-effect control knobs, which operate the temperature and thermostat, are straightforward and very easy to use. However, programming the timer function is considerably more complicated. The timer dial has 96 segments, each representing a 15-minute period. You have to push the segments in for the time period you want the heater turned on, which requires good eyesight and decent finger dexterity.
During testing, Rachel found the Pro Breeze 2500W 11 Fins Oil Filled Radiator with Thermostat Control heated up very quickly. Sitting next to it in her office, she could feel the heat radiating onto her legs within minutes, and in less than ten minutes, her office (which measures approximately 2m x 3m) felt warm and cosy. It had a real warmth impact on larger rooms too, such as her bedroom measuring 4.5 x 3.5 metres.
Overall, it has an attractive design, generally easy-to-use controls, minimal assembly, and powerful performance combined with a relatively affordable price point mean we rate the Pro Breeze 2500W with 11 Fins the best oil-filled radiator you can buy. The De’Longhi 2500W might just pip it to the post on performance, but it's nearly twice the investment of the Pro Breeze. That said, if you only have a small area to heat, you could save even more cash by opting for the lower-powered VonHaus 6 Fin 800W Oil Filled Radiator or De'Longhi TRNS0505M 500W Oil Filled Radiator further down in this round-up.
Best budget oil-filled radiator
The 6 Fin VonHaus Oil Filled Radiator is one of the smallest in our round-up, meaning it's compact, lightweight, and easily portable. While it's not powerful enough to heat a larger space, it'll manage just fine in smaller rooms, like home offices and bedrooms up to 15m2.
While there is no timer with this radiator, and only one temperature setting, but that does make it incredibly easy to use. The red on/off button is easy to see and operate, and the thermostat dial is large and straightforward, with ‘min’ and ‘max’ clearly indicated – perfect for anyone with less than 20/20 vision or who doesn't want to be overwhelmed by multiple controls.
It's also incredibly budget-friendly and inexpensive to run thanks to a lower wattage of 800W.
Best oil-filled radiator for large rooms
Our tester couldn't fault the De’Longhi Dragon 4 on performance, its powerful 2500W heat output making short work of warming the largest and most draughty rooms in her home.
Similar to the Pro Breeze 2500W, the De’Longhi Dragon 4 offers three temperature settings: 1000W, 1400W, and 2500W, and on its highest setting, its powerful performance made short work of heating our tester's 2m x 3m office, and likewise her draughty bedroom, which measures 3.5m x 4.5m.
Like the Pro Breeze 2500W, the main control dials on the De’Longhi are large and easy to twist clockwise or anti-clockwise. However, again, the timer dial has toothed segments, each representing a 15-minute period, that need pushing in and require good eyesight and dexterity. However, what the De’Longhi does have is the ability to override the timer whenever you wish to, which means you don't need to reset the fiddly timer very frequently.
However, it does have a couple of downsides. Firstly, it's heavy, weighing just over 17.5kgs. While it does have wheels, which makes for easy moving around the same floor of your home, it's going to be harder to lug up and downstairs if you want to move it around with you. Our tester also found that weight made the really simple assembly a little less simple. Turning it over solo was a challenge and definitely more of a two-person job.
Secondly, it's a significant investment, coming in at nearly twice the price of the Pro Breeze 2500W at full RRP. However, in its favour, it does feel very solidly built, and comes with a 10-year manufacturer's warranty, which could mean it represents the better long-term value if you can afford its initial investment.
Best smart oil-filled radiator
In terms of performance, heat output and general quietness, our tester really couldn't find much to criticise the Duux Edge 2000W Oil-Filled Radiator for.
With it's attractive minimalist appearance, it'll suit most tastes and it comes with both wheels and feet, depending on whether you plan on moving it around or keeping it in a dedicated spot.
While you don't have to use the smart features, they are what warrants picking this oil-filled radiator over a more affordable alternative. Using the app, you can set schedules, adjust your desired temperature, turn on the child lock setting, turn on night mode, or just monitor your energy usage. Our tester did find the app to be a little glitchy at some points, but with onboard controls and a remote control as backup, that's certainly not a dealbreaker.
Its three settings allow for customisation, and our tester was impressed with it's quick heat output, and the fact it retained heat for a good hour after being turned off.
Read our full Duux Edge 200W Oil Filled Radiator review for more details
Best oil-filled radiator for small rooms
If you want to heat a small room, like a bedroom or home office, then the compact design of the De'Longhi TRNS0505M will definitely suit. It may not be the most stylish to look at, but its small build does make it unobtrusive and easy to hide, and although this is the only portable heater on our list that doesn't have wheels, its 5kg body is lightweight and easy to pick up and move around the house.
Operation is also super straightforward. This heater may lack functionality compared to the competition, but that does mean that it's super simple to use. Simply flick the switch to turn the radiator on and then use the thermostat control knob to scroll through the 6 heat settings. A red light clearly indicates whether the unit is on or off.
With a wattage of 500W, this definitely isn't a oil-filled radiator for a large space, but it did a good job of heating our tester's small office (which measures approximately 2m x 3m) and kept it warm whilst she was working. However, in her larger bedroom (measuring 3.5m x 4.5m), it didn’t really make enough of an impact to warm it up or keep it warm.
Best value oil-filled-radiator
When looking at price point in comparison to heat output, the VonHaus 11 Fin 2500W Oil Filled Radiator offers good value for money, capable of easily heating spaces up to 30m2 with an RRP of £79.99.
The heat output on this 2500W radiator is impressive, and it certainly did the job of warming up a large and draughty bedroom quickly, according to our tester.
It's not quite as attractive as the Pro Breeze model on this list, or as easy to assemble. But if you are more concerned about function than appearance, this is well worth considering, especially if you want to heat a room that's 20-30m2 in size, and you don't need something as powerful as the De'Longhi Dragon 4.
Oil-filled radiator comparison at a glance
Model |
RRP |
Maximum room size suitability |
Wattage |
Hourly cost to run |
£79.99 |
20m2 |
2500W |
66p/kWh |
|
£34.99 |
15m2 |
800W |
21p/kWh |
|
£190 |
50m2 |
2500W |
66p/kWh |
|
£250 |
30m2 |
2000W |
53p/kWh |
|
£75.99 |
15m2 |
500W |
13p/kWh |
|
£79.99 |
30m2 |
2500W |
66p/kWh |
Running costs are based on the October 2026 energy price cap. If you want to compare the running costs of other oil-filled radiators, use our handy calculator below. All you need is the wattage of the model you are looking at.
Best of the rest
While the options above are what we consider to be the best oil-filled radiators out there, there are other models that didn't quite make it into out top six. And we think they're still worth considering.
How to choose the best oil filled radiator
So how do you choose the right kind of electric heater? The first question to ask yourself is how quickly do you want the heat. If you want instant heat for relatively short amounts of time, then a traditional electric heater will be more suitable. If, however, you want to run something over a longer period, then an oil-filled radiator could be exactly what you are looking for.
Once you've decided on the type of heater, there are so many things you should know before buying an oil-filled radiator. And when starting your research, you'll want to consider the size of the room you’re looking to heat. This will help you decide if you can manage with a smaller oil-filled radiator, which costs less to purchase and is more economical to run, or if you will need to spend more on a more powerful heater to adequately warm up the room.
Generally, you should expect a 2000-2500W oil-filled radiator to easily heat rooms and spaces up to 30m², but heat output and efficiency can also vary depending on how well (or poorly) your home is insulated and where you place it.
It’s also worth considering the weight and dimensions of the oil-filled radiator you choose, especially if you plan on moving it around your home with you. Some models can be heavy, so many not suit everyone. For a person living on their own or with mobility issues, a lightweight and compact electric heater, like the Morphy Richards HeatFlux 1.5kW Ceramic Fan Heater, may be a better option.
Another key consideration is how easy the heater is to use. For an oil-filled radiator you can control from your phone, you will likely pay more for a smart appliance. But if you don't need that level of complexity, you'll likely want something with a simple remote and on-board controls. Additionally, if vision or mobility is an issue, the control panel's size, visibility, and ease of use are essential factors.
You'll also want to consider whether a timer function would be useful for you, and whether you want the option to operate the unit via remote control.
Opting for an oil-filled radiator with different heat settings will allow you more control of the warmth, and a thermostat will ensure that you're not wasting energy. If your heater offers a thermostat, you can set a preferred temperature, and it works to maintain your room at this desired level. If the room starts to drop in temperature, then the thermostat switches the heater into action to maintain the desired temperature, and kicks it off again once the target temperature is reached.
It's also worth considering the modern alternatives to oil-filled radiators, even if just to confirm that an oil-filled radiator is in fact the right choice for your home.
FAQs
What size oil-filled radiator do I need?
As a rule of thumb, you'll need roughly 100W of power for every square metre of space you are trying to heat.
Oil-filled radiators under 1000W would only be suitable for rooms smaller than 15m2, while between 1000 and 2000W, you could effectively heat a room up to 20m2. For larger rooms, you'll need at least 2500W.
While we've provided this information for the heaters on this list, if you are considering an alternative oil-filled radiator, always check the small print for room size suitability to ensure you buy something appropriate.
What are the benefits of an oil filled radiator over an electric heater?
Understanding the differences between oil-filled radiators and electric heaters is essential before you buy, as they work very differently from each other. While an electric heater tends to product instant heat and cools down as soon as it's turned off, that's not the case with oil-filled radiators.
When it comes to how oil-filled radiators work, they rely on diathermic oil to produce heat. The heating element converts electricity into heat, which is transferred into the oil, which circulates around the radiator. This means that they can take longer to warm up, but can carry on producing heat long after they are turned off.
That can make them more energy efficient than fan heaters, and can make an ideal choice if you want to generate long periods of heat rather than a short burst.
Are oil-filled radiators expensive to run?
The cost to run an oil-filled radiator will depend on its wattage, with higher wattages costing more to run than those with lower wattages.
However, if you want to keep running costs low, it's important you don't just choose a low-wattage appliance. Instead you should choose a suitable wattage for the size of room you are looking to heat. If it's too low, your radiator will struggle to heat the space adequately, meaning you'll have it on for longer than necessary, using more energy. If it's too high, you will likely pay more upfront, and end up wasting energy unnecessarily.
Look out for models with eco modes that can automatically adjust their settings depending on the ambient room temperature, reducing energy wastage. Timers will also help you avoid leaving them running unnecessarily and needlessly wasting energy.
For most efficient use, make sure you keep doors and windows closed while you're oil-filled radiator is on, and only use them in well insulated spaces.
What does 'fin' mean on an oil filled radiator?
The ‘fins’ on an oil-filled radiator are the metal sections that are attached to the body of the unit. They play an important part in heating the room so the more fins the radiator has, the larger the surface area of the dispersal of heat.
However, modern oil-filled radiators are changing, with many of them hiding the fins behind convector-like panels which can not only aid the heating process, but also make the oil-filled radiator look more stylish.
How we tested the best oil-filled radiators
We take how we test products extremely seriously. As we only want to recommend the best products to our readers, we ensure we have as much hands-on experience with them as possible. Every Ideal Home tester also follows a strict testing protocol to make sure every review is impartial, honest, and detailed.
We test electric heaters and oil-filled radiators for a minimum of two weeks, assessing how well they heat the space and how easy they are to use, and comparing the specs of all of the models we test on the same criteria.
A large portion of the oil-filled radiators you see in this guide were tested by Rachel, a freelance reviewer who tests various products for the Ideal Home team.
Rachel tested these oil-filled radiators in her home in Oxfordshire, using it them to heat her home office and the other rooms she shares with her family.
Lauren is the Content Editor for House Manual, and it's her job to test all manner of home appliances, from the best air purifiers to the best vacuum cleaners. And, of course, the best oil-filled radiators.
As Lauren works from home in a chilly Victorian house, she has the perfect space to test these oil-filled radiators.
Rebecca is a freelance reviewer for Ideal Home, and specialises in testing cleaning, floorcare and heating appliances. As a busy mum of three, she's all about finding products that get the job done with minimal fuss.
She tested the Duux Edge 2000W Oil-Filled Radiator in her home, making the most of the model that offers both style and substance.
