Home LivingSmart HomeThis oil-filled radiator heats more for lessThe DeLonghi Radia S Eco Radiator Heater is an oil-filled radiator that produces quiet, efficient heat with plenty of controls to keep things toastyWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.(Image credit: DeLonghi)T3 VerdictA great selection of features make the DeLonghi Radia S a good pick for those who want to warm a room without spending too much.Reasons to buy+Quiet, efficient heating+Timer and thermostat provide plenty of controlReasons to avoid-Timer only offers a countdown, not a true timerWhy you can trust T3Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you.Find out more about how we test.
Home LivingSmart HomeThis oil-filled radiator heats more for lessThe DeLonghi Radia S Eco Radiator Heater is an oil-filled radiator that produces quiet, efficient heat with plenty of controls to keep things toastyWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.(Image credit: DeLonghi)T3 VerdictA great selection of features make the DeLonghi Radia S a good pick for those who want to warm a room without spending too much.Reasons to buy+Quiet, efficient heating+Timer and thermostat provide plenty of controlReasons to avoid-Timer only offers a countdown, not a true timerWhy you can trust T3Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you.Find out more about how we test.
The DeLonghi Radia S Eco Radiator Heater is an oil-filled radiator that produces quiet, efficient heat with plenty of controls to keep things toasty
When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.
(Image credit: DeLonghi)T3 VerdictA great selection of features make the DeLonghi Radia S a good pick for those who want to warm a room without spending too much.Reasons to buy+Quiet, efficient heating+Timer and thermostat provide plenty of controlReasons to avoid-Timer only offers a countdown, not a true timer
(Image credit: DeLonghi)
(Image credit: DeLonghi)
T3 VerdictA great selection of features make the DeLonghi Radia S a good pick for those who want to warm a room without spending too much.Reasons to buy+Quiet, efficient heating+Timer and thermostat provide plenty of controlReasons to avoid-Timer only offers a countdown, not a true timer
T3 VerdictA great selection of features make the DeLonghi Radia S a good pick for those who want to warm a room without spending too much.
T3 Verdict
A great selection of features make the DeLonghi Radia S a good pick for those who want to warm a room without spending too much.
Reasons to buy+Quiet, efficient heating+Timer and thermostat provide plenty of controlReasons to avoid-Timer only offers a countdown, not a true timer
Reasons to buy+Quiet, efficient heating+Timer and thermostat provide plenty of control
Quiet, efficient heating
Timer and thermostat provide plenty of control
Reasons to avoid-Timer only offers a countdown, not a true timer
Timer only offers a countdown, not a true timer
Why you can trust T3Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you.Find out more about how we test.
Why you can trust T3Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you.Find out more about how we test.
DeLonghi Radia S Eco Radiator Heater deals
$141.98View
$141.98View
$141.98View
$141.98View
$141.98
$141.98
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DeLonghi Radia S Eco Radiator Heater - Key specsOutput power: 500/900/1500WControls: Three power levels, Frost modeOther controls: Eco mode, TimerDimensions: 14.6 x 6.3 x 25.2 inches
Output power: 500/900/1500WControls: Three power levels, Frost modeOther controls: Eco mode, TimerDimensions: 14.6 x 6.3 x 25.2 inches
Output power: 500/900/1500WControls: Three power levels, Frost modeOther controls: Eco mode, TimerDimensions: 14.6 x 6.3 x 25.2 inches
Output power: 500/900/1500WControls: Three power levels, Frost modeOther controls: Eco mode, TimerDimensions: 14.6 x 6.3 x 25.2 inches
The DeLonghi Radia S Eco (TRRS0715E) is an oil-filled radiant heater. Oil radiators make for some of thebest space heatersas they can be more energy-efficient, that’s because once they reach temperature they need less energy to keep them hot. However, they are slower to heat a room than fan-based models and don’t offer the direct heat benefit.
This is a more sophisticated and fully featured model than theAmazonBasics model, as t comes complete with a timer, frost mode and thermostat control. It is more expensive, but the extra features are genuinely useful and make the heater more flexible and easier to use.
This model retails for $129.95 in the US, £119 in the UK and AU$249 in Australia. However, you can normally find some discounts available online.
(Image credit: DeLonghi)
(Image credit: DeLonghi)
DeLonghi Radia S Eco Radiator Heater review: design and build
The Radia S Eco looks like a standard oil-filled radiant heater, which is to say that it looks like an old-fashioned steam radiator that has lost its pipe connection. The oil-filled parts are covered in ridges that help the heat radiate, and the controls are located on one side of the body.
There are six buttons plus a small LED display that shows the power mode and the current target temperature. The top button turns on the device, while the next two set the target temperature. The fourth sets the power level to one of three options, while the fifth turns the eco mode on and off. This uses the three power levels of the heater to regulate the output rather than just turning it on and off in response to the thermostat. The final button enables the timer, which automatically turns the heater on or off after between a half and twenty-four hours time. There is no way to set it to trigger at a certain time, though: it only works as an offset of the current time.
Below the control panel is a cable holder for the 6-foot power cable. Because this heater can suck down a fairly hefty 1500 Watts, it should only be plugged straight into a power socket, not a power strip. DeLonghi says that is suitable for rooms of up to 250 square feet, but that really depends on the temperature. I found that it was hot enough to warm a larger room, and because the exterior won’t burn you if you touch it, I could put it right next to my desk on a really cold day to warm my feet.
(Image credit: DeLonghi)
(Image credit: DeLonghi)
DeLonghi Radia S Eco Radiator Heater review: performance
I found that the DeLonghi Radia S performed excellently, heating my test room quickly once the oil in the system got heated. That took about five minutes, though, so it isn’t great for when you come in from the cold. The fins on the radiator distributed the heat quickly, and perhaps more importantly, kept fingers away from the really hot parts between the radiator blades. The Radia was not as quick to heat as the fan heaters that we tested – it takes longer to warm the things around it, even at the highest of the three power settings.
I also found that the thermostat worked well. After heating the room to the desired temperature, it silently regulated the output of the heater to keep the temperature steady. Oil-filled radiators may be slower to heat up than fan heaters, but they are also slower to cool down, so they are ideal for keeping the temperature constant.
Unlike the fan heaters, the Radia was almost silent in use, with only a few slight popping noises as the oil heated up. It was much quieter than the similar Amazon basics oil radiant heater, which made a noise like rain on a windowpane while heating up.
(Image credit: DeLonghi)
(Image credit: DeLonghi)
DeLonghi Radia S Eco Radiator Heater review: verdict
The Radia S shows how adding a few features can make a heater much more useful. The thermostat works well for keeping a room at a comfortable temperature, and the timer means you can set it to turn on just before you get out of bed. It also has what it needs most: plenty of heating power in a compact, silent package that can warm a decent-sized room.
DeLonghi Radia S Eco Radiator Heater: Price Comparison
$141.98View
$141.98View
$141.98View
$141.98View
$141.98
$141.98
We check over 250 million products every day for the best prices
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