Dreo OH310 Oil-Filled Radiator
#1 in RadiatorsFull review
For a bedroom or office that needs silent, steady heat held at a set temperature. A fan heater warms a cold room faster for short stays.
Amazon $99.99$99.99
The Dreo OH310 Oil-Filled Radiator is the better space heater overall, rated 3.9 to 3.7. The Dreo OH310 Oil-Filled Radiator leads on value. The Dreo OH310 Oil-Filled Radiator costs $35.93 less ($99.99 vs $135.92).
Dreo OH521 Oil-Filled Radiator
#3 in RadiatorsFull review
For a bedroom or living room that needs silent, steady heat held at a set temperature. The OH310 does the same job for less.
Amazon $135.92$135.92
Prices were last checked October 30, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Dreo OH310 Oil-Filled Radiator for value ($67 per kW ($99.99, 1,500 W) vs $91 per kW ($135.92, 1,500 W)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every radiators space heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dreo OH310 Oil-Filled Radiator | Dreo OH521 Oil-Filled Radiator |
|---|---|---|
| Overall rating | 3.9/5 | 3.7/5 |
| Value 25% | 57 $67 per kW ($99.99, 1,500 W) | 31 $91 per kW ($135.92, 1,500 W) |
| Safety 25% | 100 ETL listed, tip-over shutoff, overheat shutoff | 100 ETL listed, tip-over shutoff, overheat shutoff |
| Thermostat 15% | 100 holds a set temperature | 100 holds a set temperature |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
| Controls 10% | 75 eco mode, timer, remote; no app | 75 eco mode, timer, remote; no app |
| Low setting 10% | 67 down to 600 W | 67 down to 600 W |
Specifications
| Dreo OH310 Oil-Filled Radiator | Dreo OH521 Oil-Filled Radiator | |
|---|---|---|
| Heating | ||
| Heat settings | 600 to 1,500 W | 600 to 1,500 W |
| Type | Radiator (no fan) | Radiator (no fan) |
| Element | Oil-filled | Oil-filled |
| Oscillates | No | No |
| Controls | ||
| Thermostat | Digital | Digital |
| Eco mode | Yes | Yes |
| Timer | Yes | Yes |
| Remote | Yes | Yes |
| App | No | No |
| Safety | ||
| Safety listing | ETL | ETL |
| Tip-over shutoff | Yes | Yes |
| Overheat shutoff | Yes | Yes |
| Build | ||
| Cord | - | 6 ft |
| Dimensions | 12.2 x 9.84 x 26.06 in | 18.5 x 7.68 x 28.54 in |
| Weight | 17.6 lb | 20.6 lb |
| Warranty | 1 year | 1 year |
| Released | 2023-09 | 2023-10 |