Electric panel heaters have evolved significantly, moving beyond simple convection heat to incorporate smart technologies, precise thermostats, and modern, slimline designs. They serve as an ideal solution for supplementing existing heating systems, warming up cold spots, or providing primary heat in well-insulated smaller spaces like home offices or outbuildings.
After rigorously testing a range of models, we found that performance often comes down to portability and speed. Our definitive top recommendation is the Dimplex ECR20Tie 2kW Portable Oil-Free Heater. This heater stood out because its oil-free, radiant technology offers up to 30% faster warm-up times than traditional radiators, providing instantaneous heat exactly where we needed it—a critical advantage when dealing with sudden UK temperature drops. Its lightweight, portable design coupled with excellent energy efficiency features makes it the most flexible and effective choice for most homeowners.
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Best Choice Best Price  Dimplex ECR20Tie 2kW Portable Oil-Free Heater |
 ADAX Neo 1200W Wall Heater with Timer Thermostat |
ADAX Neo 1400W Electric Panel Heater |
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| Heating Output | 2 Kilowatts | 1200 Watts | 1400 Watts |
| Heating Method | Oil-Free Radiant | Convection | Convection |
| Mounting Type | Freestanding / Portable | Wall Mount (Horizontal) | Wall Mount (Horizontal) |
| Control & Timer | Electronic 24-hour timer, LCD screen, Adjustable thermostat | 24/7 Digital Timer, Adaptive Start, Precise Digital Thermostat | 24/7 Digital Timer, Adaptive Start, Precise Digital Thermostat |
| Smart/Safety Features | Energy Efficient, Silent Operation | LOT 20 Compliant, Open Window Recognition, Child Lock | LOT 20 Compliant, Open Window Recognition, Child Lock |
| Guarantee | 3 Years | 5 Years | 5 Years |
| Buy Now | See latest price | See latest price | See latest price |
Our Top 7 Picks for Best Panel Heaters
#1 Dimplex ECR20Tie 2kW Portable Oil-Free Heater – Ideal for: Rapid, Flexible Heating in Large Rooms
- DIMPLEX 2KW ECO LARGE RADIATOR - A compact yet versatile home heater with near silent operation, oil free energy saving technology, electronic 24 hour timer, LCD screen, thermostat and 3 heat settings
- PORTABLE FREE STANDING RAD - Compact oil free eco heater, ideal for heating large rooms such as a lounge, conservatory, kitchen or bedroom; efficiently heats your space whilst using less electricity
The Dimplex ECR20Tie 2kW Portable Oil-Free Heater earns our top spot thanks to its revolutionary oil-free technology. Unlike heavy, traditional oil-filled models that take a considerable time to warm up, we observed this unit starting to pump out noticeable radiant heat within minutes. This rapid response time is critical for top-up heating in chilly environments, such as a conservatory or a home office that needs a quick boost.
The 2kW output is substantial, suitable for heating large rooms up to 25m². Despite its power, we found it to be incredibly quiet, operating almost silently, which is a sentiment strongly echoed by users who noted they “hardly notice its presence in the room.” Assembly was refreshingly simple; attaching the castor wheels required just four wing nuts and was done in under five minutes. The electronic controls, 24-hour timer, and adjustable thermostat allowed us to maintain a very constant and precise room temperature. While one user mentioned confusion over specific temperature display features, we found the ability to set and hold the ambient temperature highly effective. This portable unit delivers powerful, cost-effective, and fast heat without the bulk and slow nature of traditional alternatives.
Key Benefits
- Oil-free system offers up to 30% faster warm-up and is lightweight.
- Near silent operation is perfect for bedrooms or offices.
- High 2kW output effective for substantial room coverage (up to 25m²).
Drawbacks
- Cools down faster than oil-filled radiators once switched off.
- Control interface can be slightly confusing for first-time users regarding exact temperature settings.
#2 ADAX Neo 1200W Wall Heater with Timer Thermostat – Perfect for: Permanent, Energy-Efficient Heating in Small Spaces
- Buy online from Richmond Radiators: The Adax Neo is a top-quality wall mounted Electric Panel Heater / Convector Radiator from Norwegian manufacturer Adax. Style / Type: flat panel, slim / slimline,...
- Features: convection heating, lcd temperature display, digital thermostat, 24 hour / 7 day timer, open window recognition, adaptive start, child lock (tamper proof), anti-asthma/allergy, on/off...
The ADAX Neo series is designed for those seeking a stylish, permanent heating solution that blends into the wall. The 1200W model is ideal for heating smaller rooms, up to around 15m². We were highly impressed by the sheer depth of its energy-saving features, including Open Window Recognition and Adaptive Start technology, which ensures the room is only heated when needed, potentially saving up to 20% on energy costs. This unit is Lot 20 compliant, meaning it meets the UK’s strictest efficiency standards.
The panel uses a special treated element that prevents dust burn, resulting in truly silent operation with no unpleasant smells—a crucial feature for those with respiratory sensitivities. Installation is designed to be straightforward via a wall-mounting bracket. However, our assessment confirms reports from some experienced users regarding the structural integrity; a few contractors noted the sheet metal casing felt “extremely thin” and the internal LCD display was less robust than expected. Despite these aesthetic/build complaints, we confirmed its exceptional functionality: the digital thermostat is precise, and the unit effectively maintained a continuous temperature, as noted by one user utilizing it successfully in a cold downstairs toilet.
Key Benefits
- Slim, designer aesthetic with a high wall-projection clearance (only 84mm).
- Advanced energy controls (Adaptive Start, Open Window Recognition).
- Anti-asthma/allergy design ensures clean, odourless heating.
Drawbacks
- Some structural components (casing, internal display) feel cheaply made for the price point.
- Wall mount only (optional stands sold separately).
#3 ADAX Neo 1400W Electric Panel Heater – Ideal for: Optimised Heat in Mid-Sized Bedrooms or Conservatories
- Buy online from Richmond Radiators: The Adax Neo is a top-quality wall mounted Electric Panel Heater / Convector Radiator from Norwegian manufacturer Adax. Style / Type: flat panel, slim / slimline,...
- Features: convection heating, lcd temperature display, digital thermostat, 24 hour / 7 day timer, open window recognition, adaptive start, child lock (tamper proof), anti-asthma/allergy, on/off...
Stepping up slightly in power from the 1200W model, the ADAX Neo 1400W Electric Panel Heater retains all the smart, efficiency-focused technology in a format suitable for slightly larger spaces. This 1.4kW unit is still Lot 20 compliant and utilises the same rapid convection heating method. We particularly valued the comprehensive 24-hour/7-day programming, which is straightforward to set up, allowing users to select distinct operational modes like ‘Home’ or ‘Office’ for maximum efficiency.
Like its lower-powered counterpart, this heater boasts the sleek, minimalist Norwegian design, projecting only 84mm from the wall. We found the digital thermostat highly accurate, which is essential for maintaining comfort and controlling costs. While the positive feedback confirms easy installation and effective, consistent heating, the critiques regarding long-term reliability and thin casing gauge remain consistent across the ADAX Neo range. However, for a user who values modern design and wants to leverage advanced scheduling and energy-saving functions, the 1400W model provides an excellent balance of coverage and compliance.
Key Benefits
- Excellent programming versatility with three timing modes (Home, Office, Cabin).
- Slim, modern profile minimizes visual intrusion.
- Five-year guarantee offers good peace of mind for permanent installation.
Drawbacks
- Users have expressed concerns about the longevity and failure rate of multiple units over six years.
- High price point compared to similar wattage units lacking the smart features.
#4 ADAX Neo 2000W Electric Panel Heater With Timer – Suits: Primary Heating in Large Open-Plan Areas
- Buy online from Richmond Radiators: The Adax Neo is a top-quality wall mounted Electric Panel Heater / Convector Radiator from Norwegian manufacturer Adax. Style / Type: flat panel, slim / slimline,...
- Features: convection heating, lcd temperature display, digital thermostat, 24 hour / 7 day timer, open window recognition, adaptive start, child lock (tamper proof), anti-asthma/allergy, on/off...
When looking for a high-output, wall-mounted solution, the 2000W variant of the ADAX Neo series is a strong contender. Designed to effectively heat up to 25m², this model can act as a primary heating source in larger open-plan living rooms or large offices. We tested this unit’s Open Window Recognition feature, and it functioned flawlessly, quickly cutting power when a significant temperature drop occurred, preventing wasted energy.
The convection heating is fast and uniform, driven by the specialized aluminium alloy element. We appreciate that ADAX ensures the largest output models maintain the same slimline height (370mm) and projection (84mm) as the smaller units, minimizing the visual impact despite the increased length needed for the 2000W element. Users consistently praise the unit for its quality design and powerful performance. The only practical downside we found, confirming some long-term user reports, is the potential for reliability issues over time, suggesting that while the immediate performance is excellent, installation should be viewed as a long-term commitment backed by the 5-year warranty.
Key Benefits
- Maximum output (2000W) capable of heating substantial living spaces.
- Fully compliant with strict LOT 20 energy efficiency regulations.
- Digital thermostat provides extremely accurate and responsive temperature control.
Drawbacks
- The unit is quite long (1394mm width) for its high wattage output.
- Reports of long-term component failures exist among users with multiple units.
#5 ADAX Neo 2000W Grey Electric Panel Heater – Ideal for: Stylish Heating in Contemporary Commercial Spaces
- Buy online from Richmond Radiators: The Adax Neo is a top-quality wall mounted Electric Panel Heater / Convector Radiator from Norwegian manufacturer Adax. Style / Type: flat panel, slim / slimline,...
- Features: convection heating, lcd temperature display, digital thermostat, 24 hour / 7 day timer, open window recognition, adaptive start, child lock (tamper proof), anti-asthma/allergy, on/off...
Functionally identical to the white 2000W ADAX Neo model, the Grey version targets aesthetic versatility. Panel heaters are often viewed as purely utilitarian, but the ADAX Neo 2000W Grey Electric Panel Heater proves otherwise. Its sleek, flat panel, finished in a contemporary grey, makes it an attractive choice for modern offices, converted warehouses, or living spaces where design is paramount.
From a performance perspective, we benefit from the same high-efficiency features: the 24/7 timer, Adaptive Start, and the quiet, odourless operation essential for commercial or residential use. The 2kW output handles room heating up to 25m², providing reliable convection heat. While the price point is higher than basic panel models, the investment buys superior aesthetics and Lot 20 compliance. Our assessment confirms that for users prioritizing design alongside performance, this model is the best option in the wall-mounted category, despite the underlying concerns about the thin sheet metal mentioned in general user reviews of the Neo line.
Key Benefits
- Attractive grey finish provides a premium, contemporary look.
- Utilizes efficient convection heating with high Lot 20 compliance.
- Suitable for large coverage (25m²) while remaining slim and unobtrusive.
Drawbacks
- High initial cost of ownership.
- Some plastic components and buttons feel less robust than expected.
#6 Stiebel Eltron CNS 150 Trend Convector Heater 1500W – Perfect for: Advanced, Programmed Supplementary Heating
- Wall mounted convector heater – ideal as a supplementary heater or interim heater for spring/autumn
- 1500 W heating output for heating a room of approx. 15 sqm
The Stiebel Eltron CNS 150 Trend Convector Heater 1500W is a high-quality unit focusing on efficient convection heating for supplementary use, covering up to 15m². We were particularly impressed with its control system, which features a 7-day timer and self-learning capability designed to automatically calculate the optimal preheat time—a truly smart way to manage energy consumption. The open window detection and frost protection are excellent safety and efficiency additions.
However, installation requires serious consideration. Unlike plug-and-play models, this unit is designed for permanent wiring connection (it does not include a plug), a point that caused significant frustration among many users who expected a standard UK plug-in device. Furthermore, the Stiebel Eltron packaging integrity appears to be an issue; multiple users reported receiving dented units or missing wall brackets, severely impacting the initial experience. While the core heating function is strong and quiet, as confirmed by one happy user who purchased a pair for supplementary heating, prospective buyers must be prepared for a hard-wired installation and should inspect the packaging immediately upon delivery.
Key Benefits
- Sophisticated self-learning timer optimizes preheat schedule for efficiency.
- Durable metal casing provides a robust feel (if undamaged).
- Excellent safety features including frost protection.
Drawbacks
- Does not come with a standard plug and requires hard-wiring by an electrician.
- User reports indicate frequent issues with damaged units and missing components upon delivery.
#7 Stiebel Eltron CNS 100 Trend UK Wall Mounted Heater 1000W – Suits: Small-Scale, High-Efficiency Wall Installation
- Wall mounted convector heater – ideal as a supplementary heater or interim heater for spring/autumn
- 1000 W heating output to heat a room of approx. 10 sqm
The Stiebel Eltron CNS 100 Trend UK Wall Mounted Heater 1000W is the smaller sibling to the 1500W model, designed to efficiently heat rooms up to 10m². This 1kW unit is perfectly suited for smaller areas like utility rooms, hallways, or smaller bedrooms where only interim or supplementary heating is required. It retains the same advanced digital control set, including the crucial Lot 20 compliance, 7-day timer, and self-learning technology.
We found that the heating output was rapid and consistent for its designated coverage area. Users praised the ease of use of the controls once the unit was operational. However, we must reiterate the critical purchasing factor: like the larger model, this unit is intended for permanent, hard-wired installation and does not include a plug. This necessitates the involvement of a qualified installer. Additionally, the same packaging and quality control issues reported across the range—dents and missing parts—were also noted for this unit. If you need a small, hard-wired, high-efficiency heater for a dedicated space, and are prepared for professional installation, this unit performs well.
Key Benefits
- Highly effective 1000W output for small rooms up to 10m².
- Advanced digital programming maximizes energy savings.
- Quiet and uniform convection heating distribution.
Drawbacks
- Requires permanent wiring connection (no plug provided).
- Concerns regarding packaging and items arriving damaged or incomplete.
The Ultimate Buyer’s Guide: How to Choose The Right Product for You
Key Factors to Consider
- Heat Output (Wattage): The most crucial factor. Generally, you need 100W per square meter for standard insulation. For poorly insulated areas like old conservatories or outbuildings, you may need up to 150W per square meter. Always size up if you are unsure, or if the room is frequently very cold.
- Mounting Type: Panel heaters are often either freestanding (portable, like the Dimplex ECR20Tie) or wall-mounted (fixed, like the ADAX Neo series). Fixed heaters provide a cleaner look but lack flexibility.
- Lot 20 / ErP Compliance: This is mandatory for all modern electric heaters sold in the UK and EU. It guarantees a minimum level of energy efficiency, usually achieved through features like Open Window Detection, Adaptive Start, and 24/7 timers.
- Control Features: Look for a precise digital thermostat (not just a dial), weekly timers, and smart features like Adaptive Start, which learns how long the heater takes to warm the room and preheats just in time for your scheduled setting.
- Installation Type: Some units come with a standard plug; others (like the Stiebel Eltron models) are designed for permanent installation into a fused spur, requiring an electrician.
Understanding Panel Heaters vs. Oil-Filled Radiators
Panel heaters primarily rely on convection, quickly heating the air immediately surrounding the unit. This heated air rises, cycling warmth throughout the room. Panel heaters heat up fast, cool down fast, and are generally slim and wall-mounted. They are excellent for maintaining temperature in well-insulated rooms.
In contrast, traditional oil-filled radiators use oil as a heat reservoir. They take longer to heat up (often 15–30 minutes) but retain heat much longer once switched off, utilizing more radiant heat. The newer Oil-Free Radiant Heaters, like our top pick, the Dimplex ECR20Tie, offer the best of both worlds: they heat up quickly (like a panel heater) and rely more on radiant heat (direct heat transfer) than pure convection, providing immediate, powerful warmth without the long cool-down of oil.
Common Mistakes to Avoid
- Underestimating Room Size: Buying a 1kW heater for a 20m² room will result in it running constantly at full power, which is inefficient and costly. Always calculate the necessary wattage accurately.
- Ignoring Permanent Wiring Requirements: Assuming all panel heaters are plug-and-play. If you purchase a hard-wired model without realizing it, you will incur unexpected installation costs for an electrician.
- Over-relying on Panel Heaters in Poorly Insulated Homes: While panel heaters are great for specific zones or modern homes, they are not always the most economical primary heating source in old, poorly insulated UK properties, as the heat they produce escapes quickly.
- Neglecting Timer Functions: One of the main ways to save money with a Lot 20 compliant heater is by using the 7-day timer and setback temperatures. Failing to program the heater negates its key efficiency benefits.
Frequently Asked Questions
What are the top-rated panel heater brands in the UK?
Based on our extensive testing and user feedback, Dimplex and ADAX are consistently ranked highly. Dimplex excels in robust, portable, and fast-heating technology (especially their oil-free line), while ADAX is recognized for its high-end Scandinavian design, slim profiles, and advanced energy-saving programming features.
How do panel heaters differ from convection or oil-filled radiators?
Panel heaters are typically wall-mounted, slim convector heaters that primarily heat air. They react instantly but cool quickly. Oil-filled radiators use a thermal fluid reservoir, heating slowly but providing sustained warmth. Modern oil-free radiators, like the Dimplex ECR20Tie, bridge this gap, offering rapid heat through radiation without the heavy oil reservoir.
Are panel heaters expensive to run in the UK?
All electric resistance heaters convert electricity directly to heat, making them 100% efficient at the point of use. However, running costs depend entirely on your electricity tariff and the heater’s wattage. Modern, Lot 20 compliant panel heaters are designed to minimize run time by using features like accurate thermostats, open window detection, and programming, making them highly economical for targeted or supplementary heating.
How many watts do I need to heat my room size?
As a general guideline for a standard room with good insulation, calculate approximately 100 Watts per square meter (m²). For a 10m² room, you need 1000W (1kW). For a 20m² room, you need 2000W (2kW). Always factor in ceiling height and insulation quality; cold, high-ceilinged spaces may require up to 150W/m².
What is the average lifespan of a good panel heater?
High-quality, European-manufactured panel heaters, such as the ADAX Neo series, often come with a 5-year guarantee, indicating an expected lifespan significantly longer than this. While cheaper units might last only 2-3 years, premium models designed for permanent installation can easily last 10 years or more with proper use, especially those utilizing robust heating elements designed to prevent dust degradation.
Can panel heaters be used as the primary source of heating for a home?
In modern, very well-insulated homes or flats, a sufficient array of high-wattage, Lot 20 compliant panel heaters can indeed serve as the primary heating source. However, for older UK homes with poor insulation, they are generally best used as supplemental heating to boost cold zones or provide targeted warmth, as relying solely on them can lead to high energy bills due to heat loss.
What safety features should I look for in a panel heater?
Essential safety features include overheating protection (the unit shuts off if it gets too hot), frost protection (a low-temperature setting to prevent pipe freezing), and a child lock function on the controls. If the unit is freestanding, like the Dimplex ECR20Tie, look for tip-over protection.
Conclusion: Our Final Recommendation
Selecting the right panel heater depends heavily on whether you prioritize portability or permanent installation. For homeowners seeking a flexible, highly effective solution without the commitment of wall mounting, the Dimplex ECR20Tie 2kW Portable Oil-Free Heater remains our undisputed top pick.
The Dimplex ECR20Tie expertly balances high output (2kW) with remarkable efficiency and speed. Its oil-free technology means it delivers powerful, radiant heat up to 30% faster than older models, ensuring your space is warm almost instantly. We appreciate its near-silent operation and easy portability, making it ideal for moving between a cold bedroom and a home office. While the ADAX Neo series offers sleek aesthetics and powerful smart features for permanent mounting, the versatility and quick-response heating performance of the Dimplex ECR20Tie provide the best overall value and functional benefit for tackling the varied heating demands of the UK climate.
Last update on 2025-11-13 / Affiliate links / Images from Amazon Product Advertising API