Dreo Solaris 317 Space Heater vs De'Longhi Dragon Digital Oil-Filled Radiator
Both made our Best Space Heaters for Large Rooms shortlist, at #1 and #2. Here's how they differ and who each one suits.
- BuyOnceRight Research Desk
- Updated
- 4 min read
Quick verdict
Choose the Dreo Solaris 317 Space Heater if you want 70-degree oscillation spreads heat across a noticeably wider arc than fixed heaters. Choose the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK if you'd rather have fanless design circulates no dust or allergens through a large living space. Overall we rank the Dreo Solaris 317 Space Heater higher: #1 versus #2 in our Best Space Heaters for Large Rooms list.
Winner overall: Dreo Solaris 317 Space Heater
Dreo Solaris 317 Space Heater vs De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK compared
Every difference that matters, in one table.
| Attribute | ||
|---|---|---|
| Our ranking | #1 of 4 in Best Space Heaters for Large Rooms | #2 of 4 in Best Space Heaters for Large Rooms |
| Pick label | ||
| Brand | Dreo | De'Longhi |
| Key features | 1500W PTC ceramic heating element; 70-degree oscillation; 34dB whisper-quiet brushless DC motor | 1500W oil-filled radiator with 75% more radiant surface area; Digital display with programmable timer; ECO energy-saving mode |
| Biggest strength | 70-degree oscillation spreads heat across a noticeably wider arc than fixed heaters | Fanless design circulates no dust or allergens through a large living space |
| Main trade-off | Still capped at 1500W like every other model here, so raw output is the same | Slowest to reach target temperature of any model in this list |
| Best for | large rooms | large rooms |
Which should you buy?
#1 pick
Choose the Dreo Solaris 317 Space Heater if…
- 70-degree oscillation spreads heat across a noticeably wider arc than fixed heaters
- 34dB fan noise is quiet enough to run in an occupied living room without being distracting
- 1°F thermostat steps hold a target temperature more precisely than dial-based competitors
Best for: large rooms
Prefer the alternative? See the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK section.
#2 pick
Choose the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK if…
- Fanless design circulates no dust or allergens through a large living space
- Residual heat keeps a large room from cooling immediately after shutoff
- ECO mode measurably cuts running cost over a multi-hour evening
Best for: large rooms
Prefer the alternative? See the Dreo Solaris 317 Space Heater section.
Pros and cons of each
Dreo Solaris 317 Space Heater
Pros
- 70-degree oscillation spreads heat across a noticeably wider arc than fixed heaters
- 34dB fan noise is quiet enough to run in an occupied living room without being distracting
- 1°F thermostat steps hold a target temperature more precisely than dial-based competitors
- Digital display and remote make adjusting settings from across a large room easy
Cons
- Still capped at 1500W like every other model here, so raw output is the same
- Plastic housing feels lighter-duty than the De'Longhi's metal radiator body
- Priced higher than basic tower heaters without oscillation
De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK
Pros
- Fanless design circulates no dust or allergens through a large living space
- Residual heat keeps a large room from cooling immediately after shutoff
- ECO mode measurably cuts running cost over a multi-hour evening
- Even, gentle heat suits rooms occupied for long stretches
Cons
- Slowest to reach target temperature of any model in this list
- Bulkiest and heaviest option, harder to reposition around furniture
- Surface gets hot enough to touch that it needs clearance from foot traffic
Dreo Solaris 317 Space Heater vs De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK: common questions
Which is better, the Dreo Solaris 317 Space Heater or the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK?
Choose the Dreo Solaris 317 Space Heater if you want 70-degree oscillation spreads heat across a noticeably wider arc than fixed heaters. Choose the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK if you'd rather have fanless design circulates no dust or allergens through a large living space. Overall we rank the Dreo Solaris 317 Space Heater higher: #1 versus #2 in our Best Space Heaters for Large Rooms list.
What is the difference between the Dreo Solaris 317 Space Heater and the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK?
The Dreo Solaris 317 Space Heater stands out because 70-degree oscillation spreads heat across a noticeably wider arc than fixed heaters, while the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK stands out because fanless design circulates no dust or allergens through a large living space. The trade-offs differ too: the Dreo Solaris 317 Space Heater's main caveat is that still capped at 1500W like every other model here, so raw output is the same, and the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK's is that slowest to reach target temperature of any model in this list.
Is the Dreo Solaris 317 Space Heater worth it over the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK?
For most buyers, yes: it's our #1 pick. Consider the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK instead if still capped at 1500W like every other model here, so raw output is the same is a deal-breaker for you.
Who should buy the De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK instead of the Dreo Solaris 317 Space Heater?
The De'Longhi Dragon Digital Oil-Filled Radiator TRD40615EBK suits large rooms, while the Dreo Solaris 317 Space Heater is best for large rooms.