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
The Dreo OH521 Oil-Filled Radiator is the better space heater overall, rated 3.7 to 3.5. The Dreo OH521 Oil-Filled Radiator leads on controls and thermostat. The Dreo Oil-Filled Radiator 153 wins on value. The Dreo Oil-Filled Radiator 153 costs $40.93 less ($94.99 vs $135.92).
Dreo Oil-Filled Radiator 153
#4 in RadiatorsFull review
For someone who wants a silent radiator with plain knobs and no electronics to fuss with. Those who want a timer or a set temperature should pay a little more for the OH310.
Amazon $94.99$94.99
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 OH521 Oil-Filled Radiator for controls (eco mode, timer, remote; no app vs basic; no eco mode) and thermostat (holds a set temperature vs adjustable thermostat dial, no set temperature).
- Choose the Dreo Oil-Filled Radiator 153 for value ($63 per kW ($94.99, 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 OH521 Oil-Filled Radiator | Dreo Oil-Filled Radiator 153 |
|---|---|---|
| Overall rating | 3.7/5 | 3.5/5 |
| Value 25% | 31 $91 per kW ($135.92, 1,500 W) | 61 $63 per kW ($94.99, 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 | 60 adjustable thermostat dial, no set temperature |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
| Controls 10% | 75 eco mode, timer, remote; no app | 0 basic; no eco mode |
| Low setting 10% | 67 down to 600 W | 67 down to 600 W |
Specifications
| Dreo OH521 Oil-Filled Radiator | Dreo Oil-Filled Radiator 153 | |
|---|---|---|
| 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 | Dial |
| Eco mode | Yes | No |
| Timer | Yes | No |
| Remote | Yes | No |
| App | No | No |
| Safety | ||
| Safety listing | ETL | ETL |
| Tip-over shutoff | Yes | Yes |
| Overheat shutoff | Yes | Yes |
| Build | ||
| Cord | 6 ft | - |
| Dimensions | 18.5 x 7.68 x 28.54 in | 9.92 x 12.83 x 26.14 in |
| Weight | 20.6 lb | 17.9 lb |
| Warranty | 1 year | 1 year |
| Released | 2023-10 | 2025-06 |