De'Longhi Dragon 4 TRD41025T 2.5kW review: running cost and verdict
De'Longhi's 2.5 kW Dragon 4: three heat settings, thermostat and timer, rated for rooms up to 75 m³ (about 30 m²). Silent, steady heat that keeps going after it switches off.
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The good
- 2.5 kW, 3 heat settings
- Rooms up to 75 m³ (about 30 m²)
- Timer and room thermostat
- Silent: no fan
The not so good
- Heavy
- Slow to warm up compared with a fan heater
How much does it cost to run?
One hour at full power (2,500 W)
at 26.32p/kWh
A month of typical use
5 hours a day on thermostat
Ofgem price cap, Direct Debit, national average (1 October to 31 December 2026). Watt for watt, every electric heater costs the same to run. What makes the De'Longhi Dragon 4 TRD41025T 2.5kW cheaper or dearer is its size and its controls: dial thermostat, timer. More in which electric heater is cheapest to run.
Specifications
| Type | Oil filled radiator |
|---|---|
| Power | 2,500 W |
| Room size | about 25 m² (269 sq ft) |
| Controls | Dial thermostat, timer |
| Oscillation | No |
| Tip-over protection | Not stated |
| Splash protection | No |
| Noise | Silent (no fan) |
| Amazon ASIN | B00CA1T076 |
| Source of specs | Amazon.co.uk listing (TRD41025T, 2,500 W, 4.5 stars from 1,854 ratings) |
Frequently asked questions
How much does the De'Longhi Dragon 4 TRD41025T 2.5kW cost to run?
At full power it uses 2.50 kWh an hour: about 65.8p at the Ofgem price cap (26.32p/kWh). Typical use (5 hours a day on thermostat) comes to around £59.22 a month.
What size room will the De'Longhi Dragon 4 TRD41025T 2.5kW heat?
About 25 m² (269 sq ft) in a reasonably insulated home. For a draughty room or an old house, go one size up.
Can I leave the De'Longhi Dragon 4 TRD41025T 2.5kW on overnight?
It is designed for long periods: use the thermostat on a low setting, keep it away from curtains and bedding, and plug it straight into the wall.
Can I use the De'Longhi Dragon 4 TRD41025T 2.5kW in a bathroom?
No: it has no splash protection. In a bathroom use only heaters rated IP24 or higher, fitted outside the wet zones.
Alternatives
De'Longhi Radia S TRRS0920E.G 2000W
- Oil filled radiator · 2,000 W
- 2 kW oil filled radiator with LED display, timer, safety thermostat and an Eco Plus mode that adjusts output to the room temperature.
- Costs 52.6p an hour at full power.
De'Longhi Dragon 4 TRD40820T
- Oil filled radiator · 2,000 W
- The classic premium oil filled radiator: 2 kW, three heat settings, thermostat, anti-frost and a 24-hour timer, with a 10-year warranty. Silent and keeps warming after it switches off.
- Costs 52.6p an hour at full power.
Dimplex ECR20 Oil Free Radiator 2kW
- Oil-free radiator · 2,000 W
- Oil-free 2 kW column radiator: lighter than an oil filled one and quicker to warm up, with three heat settings, thermostat, castors and a tilt switch.
- Costs 52.6p an hour at full power.
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