An energy efficient space heater is one that delivers the comfort you need with as few full-power hours as possible. In these space heater energy efficient reviews we score five models that save power in different ways: lower wattage, heat-storing oil radiators, silent convection panels and mica heaters that spread warmth evenly.
All five are scored on the same criteria using manufacturer specifications and owner feedback. For our shortlist of the lowest-watt and ECO picks, read the best space heater energy efficient guide. Our Editorial Policy explains how we work.
Top 3 Energy Efficient Heaters From Our Reviews
PELONIS 1500W Oil-Filled Radiator with Remote (PSHO06MR6ASB)
- Heat-storing oil
- Near-silent
- Thermostat
Brightown MH-20 800W Plug-In Wall Outlet Heater
- 800W
- Plugs into the outlet
- Timer
hykolity ZOH701E Oil-Filled Radiator with 24H Timer
- 24-hour timer
- Power-off memory
- Child lock
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How We Scored Energy Efficiency
| Criterion | Weight | What we look at |
|---|---|---|
| Power use & settings | 30% | Wattage, low modes, ECO |
| Thermostat control | 25% | Accuracy, cycling, timer |
| Heat spread | 20% | Room coverage, evenness |
| Noise | 10% | Fan or fan-free |
| Safety | 15% | Overheat, tip-over, cool-touch |
| Heater | Score | Best for |
|---|---|---|
| PELONIS oil radiator | 9.2/10 | Bedrooms and living rooms |
| Brightown MH-20 | 8.8/10 | Small rooms up to 100 sq ft |
| hykolity ZOH701E | 8.7/10 | Scheduled all-day heat |
| ROVSUN panel | 8.4/10 | Wall or floor convection |
| Reekie HV1201 | 8.2/10 | Fast, even mica heat |
Energy Efficient Space Heaters Compared
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  PELONIS 1500W Oil-Filled Radiator with Remote (PSHO06MR6ASB) |
| Check Latest Price |
| 2 |  Brightown MH-20 800W Plug-In Wall Outlet Heater |
| Check Latest Price |
| 3 |  hykolity ZOH701E Oil-Filled Radiator with 24H Timer |
| Check Latest Price |
| 4 |  ROVSUN 1500W Flat Panel Convection Heater |
| Check Latest Price |
| 5 |  Reekie HV1201 1500W Mica Heater with Thermostat |
| Check Latest Price |
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1. PELONIS 1500W Oil-Filled Radiator with Remote (PSHO06MR6ASB)
Highest Overall Score: 9.2/10
- Upgraded M-shaped fins with a larger heat-dissipation area
- Fan-free design, almost silent
- Oil keeps radiating heat after the element cycles off
- Adjustable thermostat and remote
- Heavy and slow to warm up
- Takes floor space
- Type: oil-filled radiator, 1500W
- Heat: radiant, fan-free
- Control: thermostat + remote
- Model: PSHO06MR6ASB
Oil radiators are efficient in practice because the oil stores heat. Once the room is warm, the thermostat cycles the element off while the fins keep radiating, which reduces full-power time.
The PELONIS is quiet enough for bedrooms and gentle on dry winter air.
Who the PELONIS oil radiator fits best
Bedrooms and living rooms used for hours at a time.
Who should skip the PELONIS oil radiator
If you need fast, short bursts of heat.
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2. Brightown MH-20 800W Plug-In Wall Outlet Heater
Lowest Power Draw: 8.8/10
- Uses only 800 watts, about half a standard heater
- Heats rooms up to about 100 sq ft
- 180° rotating plug design plugs straight into the outlet, no cord
- Timer, remote and digital display
- Small-room coverage only
- Blocks the second outlet on some plates
- Type: plug-in wall heater
- Power: 800W
- Coverage: up to 100 sq ft
- Control: remote, timer
- Model: MH-20
Brightown’s plug-in heater is a smart way to warm a small bathroom, closet office or nursery corner while drawing little power.
The timer stops it running when the room is empty.
Who the Brightown 800W plug-in fits best
Bathrooms, small offices and closets.
Who should skip the Brightown 800W plug-in
Medium or large rooms.
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3. hykolity ZOH701E Oil-Filled Radiator with 24H Timer
Best Scheduling: 8.7/10
- 24-hour timer with power-off memory
- Wider M-shaped fins for faster, even radiant heat
- Touch screen, remote, adjustable temperature
- Child lock and flame-resistant materials
- About 16.9 lb
- Slow warm-up
- Type: oil-filled radiator, 1500W
- Timer: 24 hours
- Control: touch screen + remote
- Weight: about 16.9 lb
- Model: ZOH701E
Scheduling is one of the most effective ways to save energy, and the 24-hour timer on this hykolity radiator lets you run it only when the room is used.
Power-off memory restores your settings after an outage.
Who the hykolity ZOH701E fits best
Rooms used on a routine.
Who should skip the hykolity ZOH701E
If you move the heater room to room often.
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4. ROVSUN 1500W Flat Panel Convection Heater
Best Flat Panel: 8.4/10
- Convection panel heater, silent operation
- Wall-mounted or freestanding use
- LCD touch screen with temperature control and remote
- Tip-over protection; rated for rooms up to 400 sq ft
- Panel surface gets warm
- Slower to heat than a fan heater
- Type: flat panel convection, 1500W
- Mount: wall or floor
- Coverage: up to 400 sq ft
- Control: LCD + remote
ROVSUN’s panel spreads heat by natural convection, so the thermostat holds temperature quietly without fan noise.
Its built-in handle doubles as a towel warmer.
Who the ROVSUN panel fits best
Living rooms and bedrooms.
Who should skip the ROVSUN panel
If small children may touch the panel.
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5. Reekie HV1201 1500W Mica Heater with Thermostat
Best Fast Mica Heat: 8.2/10
- Far-infrared plus convection heating
- Warmth in under 30 seconds
- Two heat settings and a thermostat
- 3D heating for a wider, even range
- Surface gets hot
- Lightweight frame
- Type: mica heater, 1500W
- Settings: 2 heat levels
- Control: thermostat
- Weight: about 7.9 lb
- Model: HV1201
Mica heaters reach temperature quickly and spread heat evenly, so they cycle less than fan heaters in many rooms.
The Reekie HV1201 is a simple, efficient choice for daily use.
Who the Reekie HV1201 fits best
Bedrooms and offices.
Who should skip the Reekie HV1201
Homes with toddlers.
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How to Judge an Energy Efficient Space Heater
Lower Wattage for Smaller Spaces
An 800W heater uses about half the power of 1500W, ideal for rooms up to 100 sq ft.
Heat Storage and Fan-Free Designs
Oil radiators and panels keep radiating heat after cycling off.
Timers and Thermostats
Running only when needed is the biggest saver.
Safety
- Keep 3 feet of clearance.
- Plug directly into a wall outlet.
- Never cover a heater.
Frequently Asked Questions
Which energy efficient heater scored highest?
The PELONIS oil-filled radiator scored 9.2/10 for its heat storage, silent operation and thermostat.
Do oil-filled radiators save electricity?
They store heat and cycle less, which reduces full-power time in many rooms.
Is an 800W heater enough?
For rooms up to about 100 sq ft, yes.
Do timers save energy?
Yes. They stop the heater running when you no longer need it.
Final Verdict: Space Heater Energy Efficient Reviews
The PELONIS oil-filled radiator is the best energy efficient heater for longer use. The Brightown 800W plug-in has the lowest power draw, and the hykolity ZOH701E is the best for scheduling.
Overall: PELONIS 1500W Oil-Filled Radiator with Remote (PSHO06MR6ASB) Check Latest Price
Lowest draw: Brightown MH-20 800W Plug-In Wall Outlet Heater Check Latest Price
Scheduling: hykolity ZOH701E Oil-Filled Radiator with 24H Timer Check Latest Price
Choose the smallest heater that keeps you comfortable, and use the thermostat and timer.
Looking for something else? Browse all of our Heaters guides and the wider Heating & Cooling section.
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