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 3.1. The Dreo OH521 Oil-Filled Radiator leads on safety and value. The Pasapair HP2501-15AW Mica Panel wins on controls. The Dreo OH521 Oil-Filled Radiator costs $64.07 less ($135.92 vs $199.99).
Pasapair HP2501-15AW Mica Panel
#9 in RadiatorsFull review
For a bedroom or bathroom where a quiet wall or floor panel on a WiFi schedule is worth paying for. A plain oil radiator gives the same heat for less.
Amazon $199.99$199.99
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 safety (ETL listed, tip-over shutoff, overheat shutoff vs tip-over shutoff, overheat shutoff; no safety listing published) and value ($91 per kW ($135.92, 1,500 W) vs $133 per kW ($199.99, 1,500 W)).
- Choose the Pasapair HP2501-15AW Mica Panel for controls (eco mode, timer, remote, app vs eco mode, timer, remote; no app).
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 | Pasapair HP2501-15AW Mica Panel |
|---|---|---|
| Overall rating | 3.7/5 | 3.1/5 |
| Value 25% | 31 $91 per kW ($135.92, 1,500 W) | 0 $133 per kW ($199.99, 1,500 W) |
| Safety 25% | 100 ETL listed, tip-over shutoff, overheat shutoff | 60 tip-over shutoff, overheat shutoff; no safety listing published |
| 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 | 100 eco mode, timer, remote, app |
| Low setting 10% | 67 down to 600 W | 67 down to 600 W |
Specifications
| Dreo OH521 Oil-Filled Radiator | Pasapair HP2501-15AW Mica Panel | |
|---|---|---|
| Heating | ||
| Heat settings | 600 to 1,500 W | 600 to 1,500 W |
| Type | Radiator (no fan) | Radiator (no fan) |
| Element | Oil-filled | Micathermic |
| Oscillates | No | No |
| Controls | ||
| Thermostat | Digital | Digital |
| Eco mode | Yes | Yes |
| Timer | Yes | Yes |
| Remote | Yes | Yes |
| App | No | WiFi |
| Safety | ||
| Safety listing | ETL | None published |
| Tip-over shutoff | Yes | Yes |
| Overheat shutoff | Yes | Yes |
| Build | ||
| Cord | 6 ft | - |
| Dimensions | 18.5 x 7.68 x 28.54 in | - |
| Weight | 20.6 lb | - |
| Warranty | 1 year | 1 year |
| Released | 2023-10 | - |