De'Longhi Radia S Digital Oil Column Heater 2400W Verdict

Who it fits

The De'Longhi Radia S TRRS1224E.G is for buyers who want fan-free room heating for longer sessions and prefer digital local controls over an app-connected heater.

Its case is straightforward: a 12-fin oil-filled radiator with three power settings, an electronic thermostat, 24-hour programmable timer, child lock, tip-over auto-off, safety thermostat and a seven-year warranty.

That makes it particularly coherent for a bedroom, study or enclosed living space where steady fan-free heat matters more than feeling a burst of warm air immediately after switch-on.

The product also suits buyers who want scheduling without building their heating routine around an app. The 24-hour timer and electronic thermostat provide more control depth than a basic mechanical oil column while keeping the heater self-contained.

The main ownership penalty is weight. At 15.59kg, the Radia S is movable on castors but is not a lightweight heater for frequent stair carrying. It also has no Wi-Fi, so buyers who want phone-based schedules should compare the connected Dragon5 instead.

Retailer prices

Prices we've recently checked.

We keep retailer prices separate from product fit. Different retailers and marketplace sellers can show different prices, and prices and availability can change. Check the retailer before buying.

delonghi.com

$269

Checked 22 Oct

What changes the decision

Do you want fan-free long-session heat rather than quick directed airflow?

Radia S uses oil-filled radiant and convection heating without a fan.

That architecture is the first reason to choose it. It suits longer sessions when you want to avoid forced airflow and do not need the immediate sensation of warm air that a ceramic fan heater provides.

The trade-off is response. Oil thermal mass generally takes longer to warm than a compact fan heater, so it is a weaker fit for brief ten-minute heating bursts.

It can also retain and release heat differently after the thermostat cycles, which is part of why the comfort experience feels different from a fan heater. That does not make it inherently more efficient; it simply changes the heating pattern.

How useful are the three power settings?

De'Longhi specifies 1000W minimum and 2400W maximum, with three power settings.

Those settings let you adjust instantaneous output, but wattage is not a direct quality ranking and a lower setting does not guarantee lower total energy use across a whole evening.

The more useful question is whether the heater's fan-free format, thermostat and schedule match how long the room will be heated.

If the room is only occupied for short bursts, the oil-column response may be less convenient even though the maximum wattage is high.

Is a local digital timer enough, or do you want app control?

The heater includes an electronic room thermostat, 24-hour programmable timer, Eco function and child lock.

That gives you meaningful scheduling without relying on Wi-Fi or a phone. You can set a daily routine locally and leave the heater as a self-contained appliance.

That can be appealing in a bedroom or study where the heater stays in one place and follows a predictable routine.

If remote changes, app scheduling or connected-home control would be used regularly, the Dragon5 Connect is closer to the requirement.

Does the 15.59kg weight create a real mobility problem?

At 15.59kg, Radia S is designed to be rolled on castors rather than carried frequently.

That is perfectly workable on one level. It is much less attractive if the same heater needs to move up and down stairs or be stored away after each use.

If portability means lifting rather than rolling, compact ceramic or lighter panel heaters should move up the shortlist.

The weight also matters at season change: a heater that lives in a cupboard upstairs creates a different ownership task from one that stays in a ground-floor room all winter.

How should you read the 72m³ room figure and seven-year warranty?

De'Longhi publishes 72m³ working-capacity guidance and a seven-year warranty.

Those claims answer different questions. The warranty is a written support term. The 72m³ figure is manufacturer sizing guidance and does not guarantee comfort in every room because insulation, drafts, ceiling height and outdoor temperature change the heating load.

Use the room figure as context, not as independent performance proof.

The seven-year warranty is a meaningful ownership signal for buyers comparing support terms, but it should not override the basic fit. A long warranty does not make a heavy oil column suitable for frequent stair carrying or short spot-heating sessions.

Are the documented safety controls enough for your use case?

The version checked material includes tip-over auto-off, a safety/overheat thermostat and child lock.

That gives you specific safety features to evaluate rather than a vague "safe heater" label. It does not remove the need for clearances, correct power-point use and following the operating instructions.

For households with children, the child lock adds useful control protection, but it does not change the physical heat and placement considerations of an oil column.

Who should choose something else

Consider De'Longhi Dragon5 Connect 2400W Oil Column Heater Wi-Fi: Medium-to-large-room buyers prioritising silent sustained heat, precise thermostat control and remote scheduling over instant fan-driven warmth.

Consider Ausclimate EcoSmart Pro Large 2000W Panel Heater - Charcoal Black: Buyers prioritising silent fan-free smart heating, wall-mount flexibility and stronger Australian owner evidence than most newer connected heaters.

Consider Noirot Spot Plus 2000W Panel Heater with Timer & WiFi: Noise-sensitive or allergy-sensitive buyers wanting fan-free panel heat, wall-mount flexibility and app scheduling with a long written warranty.

PIQSY conclusion

Choose the De'Longhi Radia S TRRS1224E.G when you want fan-free sustained heat, an electronic thermostat, a 24-hour timer and a long written warranty without adding Wi-Fi.

Skip it when quick spot heating, frequent lifting or app control matters more than the steadier oil-column format.