De'Longhi TRRS0920 review

What “oil-filled” changes about how it heats

De’Longhi’s Radia S is built around 9 fins filled with heated oil, rather than a fan pushing air across a ceramic or metal element. The practical difference De’Longhi itself highlights is residual heat: the oil keeps radiating warmth for a while after the unit is switched off, which neither the Rowenta Compact Power nor the Dreo Atom 316 reviewed alongside it can do, since both stop producing heat the instant their element loses power. The trade-off, which De’Longhi doesn’t advertise but is inherent to the technology, is a slower initial warm-up — the oil itself has to heat before the fins get properly warm.

Power, control, and De’Longhi’s “Real Energy” claim

At 2 000 W, this is tied with the Rowenta Compact Power’s Turbo setting for the highest wattage in this four-heater comparison. Temperature and power are set with a single stepless dial rather than a digital thermostat with a numeric target — De’Longhi calls the underlying control logic “Real Energy” and describes it as gradually increasing heat toward the desired temperature to reach it faster and hold running costs down. We’re repeating that as De’Longhi’s own description of how the control system behaves, not as an independently verified efficiency figure.

Safety thermostat, not a tip-over sensor

De’Longhi’s listing states a safety thermostat for overheat protection — a real, named safety feature, distinct from the main control dial. What isn’t in the published spec sheet is any tip-over-specific sensor, of the kind Dreo names explicitly for the Atom 316. That’s not unusual for oil-filled radiators, which are heavy and low-slung by design and rely partly on that weight and base stability rather than an electronic tilt sensor, but we’d rather say plainly that De’Longhi doesn’t publish one than imply it has a feature it doesn’t state.

Size, weight, and moving it around

At 12.2 kg, this is by a wide margin the heaviest heater in this comparison — nearly nine times the Dreo Atom 316’s 1.38 kg. De’Longhi addresses that directly with 360° castors and front-and-rear handles, which matters more here than on a lighter heater, since this isn’t something you’ll want to lift by one hand. The stated dimensions (16 × 47.2 × 65 cm) put it closer to a piece of furniture than a portable appliance, which fits its likely use case: a room you heat for hours at a time rather than a spot you heat briefly and move on from.

Running cost, without guessing at electricity prices

At 2 000 W, one hour of continuous full-power use draws 2 kWh — the same per-hour draw as the Rowenta’s Turbo mode. Multiply that by your own electricity tariff for an actual cost figure; we’re deliberately not publishing a €-per-night estimate, since doing so would mean picking an electricity price out of the air rather than reporting something De’Longhi or Amazon actually states.

Where we found it in stock

We checked Amazon.com (US), Amazon.co.uk (GB), Amazon.de (DE), Amazon.fr (FR), Amazon.it (IT), and Amazon.es (ES). ASIN B00ZUUEBOQ carried a live offer on DE, FR, IT, and ES, with prices from about 118 € (IT) to about 147 € (DE). We found no live offer, and in the case of US no catalog entry at all, on either the US or GB Amazon site at the time we checked.