Efficient Space Heaters Review
De'Longhi TRD40615T Dragon Oil-Filled Radiator Review (2026)
A silent 1500W oil-filled radiator that holds heat via convection, ideal for running long stretches without noise.
Our verdict: Worth a low-risk try
★★★★⯨
$80-$110 · Amazon return policy applies
Check Today's Price →At a glance
| Category | Efficient Space Heaters |
|---|---|
| Our rating | ★★★★⯨ 4.6/5 |
| Price | $80-$110 |
| Availability | Check current price on Amazon |
| Returns | Standard Amazon return policy applies |
| Best for | Bedrooms and offices where silent, steady, long-running heat matters more than instant warmth. |
Our take
The De'Longhi TRD40615T Dragon is a sealed oil-filled radiator that heats by warming internal thermal fluid and radiating it through fins, then circulating it via natural convection. Because there's no fan, it's completely silent and the warmth lingers even after the element cycles off, which makes it efficient for sustained heating in a room you occupy for hours. It packs up to 40% more radiant surface than standard radiators for faster warm-up, with three heat settings, an adjustable thermostat, and a 24-hour programmable timer so it only runs when needed. The permanently sealed oil never needs refilling, and pre-assembled Smart Snap wheels make it easy to roll between rooms. Rated for spaces up to ~144 sq ft.
What we like
- Completely silent convection heat with no fan or moving air
- Retains warmth after cycling off, reducing on-time
- 24-hour programmable timer and adjustable thermostat
- Sealed oil never needs refilling; cool-to-touch design options
What to keep in mind
- Slow to heat up compared to fan-forced ceramic heaters
- Heavy and bulky to move despite the wheels
Buy through Amazon and you're covered by their standard return policy. Check the live listing for today's price and real buyer reviews before you commit.
Sold on Amazon · Standard returns apply · Live price & reviews on the listing
Ready to look at De'Longhi TRD40615T Dragon Oil-Filled Radiator? Check current pricing, availability, and customer reviews on Amazon.
Check Today's Price →As an Amazon Associate, Home Energy Lab earns from qualifying purchases. Home Energy Lab is reader-supported. Some links on this site are affiliate links — we may earn a commission if you buy through them, at no extra cost to you. We only feature gear we'd recommend to a friend, and our opinions are our own.
Frequently asked questions
Is De'Longhi TRD40615T Dragon Oil-Filled Radiator worth it?
The De'Longhi TRD40615T Dragon is a sealed oil-filled radiator that heats by warming internal thermal fluid and radiating it through fins, then circulating it via natural convection. Because there's no fan, it's completely silent and the warmth lingers even after the element cycl We weigh real-world usefulness against price, and we note the downsides honestly. Check the live price and recent customer reviews on Amazon before deciding — both can change.
Where can I buy De'Longhi TRD40615T Dragon Oil-Filled Radiator?
Through Amazon, where the standard Amazon return policy applies. We link to the current listing so you always see up-to-date pricing and availability.
Who is De'Longhi TRD40615T Dragon Oil-Filled Radiator best for?
Bedrooms and offices where silent, steady, long-running heat matters more than instant warmth.
Is De'Longhi TRD40615T Dragon Oil-Filled Radiator the best in its category?
It's one we think is worth considering, but "best" depends on your needs and budget — compare it against the alternatives in our reviews before you buy.