2kW vs 3kW Fan Heater
The main difference between a 2kW and 3kW fan heater is heating output. A 2kW heater provides up to 2,000W of heating power, while a 3kW model can provide up to 3,000W. In simple terms, a 3kW heater has 50% more maximum heating output, which can be useful when you need to warm a colder or larger space more quickly.
Elixir Garden Supplies offers a range of both 2kW and 3kW electric fan heaters, making it easier to choose a heater suited to the size and requirements of your space. For smaller workshops, garages and enclosed areas, models such as the BH-20R1 Electric Fan Heater | 2kW provide a compact and portable heating option, with an adjustable thermostat and overheat protection. The BH-20R3 Electric Fan Heater | 2kW is another portable 2kW option designed for quickly heating smaller spaces.
For areas that need greater heating output, Elixir’s BH-30R1 Electric Fan Heater | 3kW provides up to 3,000W of heating power. It is designed for quickly heating household spaces, workshops, outbuildings, garages and warehouses, and also includes an adjustable thermostat and overheat protection.
However, bigger is not automatically better. A 3kW heater uses more electricity than a 2kW model when operating at full rated output. If a 2kW heater can comfortably heat your space and maintain the temperature you require, choosing a higher-output model may offer little practical benefit.
On the other hand, choosing a 2kW heater simply because it has a lower maximum power requirement can also be a false economy if it struggles to provide enough heat for the space. The best choice is therefore to consider the size of the area, how quickly you need it heated and the temperature you want to maintain.
For a wider choice, Elixir’s Fan Heaters range includes both 2kW and 3kW electric models, alongside larger industrial heating options.
Quick Answer
- 2kW = 2,000W
- 3kW = 3,000W
- A 3kW heater has 50% more rated heating output than a 2kW heater
- At continuous full output, 2kW uses 2kWh per hour
- At continuous full output, 3kW uses 3kWh per hour
- A 3kW heater has greater potential to warm a suitable space faster
- A 2kW heater may be sufficient for smaller or better-insulated spaces
- A 3kW heater may be preferable for larger spaces or greater heat loss
- Neither output is guaranteed to heat a particular floor area
- Room volume, ceiling height, insulation, draughts, doors, windows, outside temperature and target temperature all matter
- A large uninsulated workshop may require more than 3kW
- Do not assume several high-output heaters can be connected to the same electrical circuit
- If you only require gentle background heat or frost protection, an Elixir TH0 or TH0-B Tube Heater may be more appropriate than either fan heater
2kW vs 3kW Fan Heater Comparison
| Feature | 2kW Fan Heater | 3kW Fan Heater |
|---|---|---|
| Maximum Output | 2,000W | 3,000W |
| Relative Output | 100% | 150% |
| Full Power Energy Use/Hour | 2kWh | 3kWh |
| Warm Up Potential | Fast | Faster |
| Electrical Demand | Lower | Higher |
| Smaller Spaces | Strong Option | May Be Unnecessary |
| Greater Heat Loss | May Struggle | Stronger Option |
| Large Uninsulated Workshop | May Be Inadequate | May Still Be Inadequate |
| Background Frost Protection | Often Excessive | Often Excessive |
Elixir Gardens 2kW Electric Fan Heaters
When Is A 2kW Fan Heater Better?
Choose 2kW where the heating requirement is relatively modest: smaller rooms, smaller workshops, insulated outbuildings, garden offices, short heating periods or spaces with limited heat loss.
What Does 2kW Mean?
A 2kW heater has a rated maximum power of 2 kilowatts, or 2,000 watts. At continuous rated power it uses 2kWh in one hour, 8kWh in four hours and 16kWh in eight hours. Actual consumption can be lower when a thermostat cycles the heating element off.
Elixir Gardens offers 2kW fan-heater options for customers whose heating requirement does not justify moving to 3kW.
Best for: smaller or better-insulated indoor spaces requiring rapid heating.
Why choose 2kW? A 2kW fan heater combines rapid fan-assisted heating with lower maximum electrical demand than a 3kW model.
Recommended when: 2kW is sufficient to reach and maintain your required temperature.
Will A 2kW Heater Run Longer Than A 3kW Heater?
Potentially. If both can achieve the desired temperature, the 3kW model may reach it sooner. Exact cycling depends on heat loss, thermostat behaviour, weather, door opening and heater positioning.
Elixir Gardens 3kW Electric Fan Heaters
When Is A 3kW Fan Heater Better?
A 3kW heater becomes more attractive when the room is larger, the workshop is colder, heat loss is higher, faster warm-up matters or a 2kW heater struggles to reach the desired temperature.
What Does 3kW Mean?
A 3kW heater has a rated maximum power of 3 kilowatts, or 3,000 watts. At continuous maximum output it uses 3kWh in one hour, 12kWh in four hours and 24kWh in eight hours.
How Much More Powerful Is A 3kW Heater?
3kW divided by 2kW equals 1.5. Therefore, 3kW is 150% of 2kW, or 50% more rated output. That extra 1kW can be significant when warming a cold room quickly, although it does not guarantee 50% faster warm-up.
Does A 3kW Heater Always Cost 50% More?
If both heaters run continuously at full power for exactly the same time, the 3kW heater consumes 50% more energy. In real use, a 3kW heater may reach target temperature sooner and cycle while a 2kW heater continues running.
Could A 3kW Heater Be More Efficient Because It Heats Faster?
Be careful with the word efficient. A 3kW resistance heater is not inherently more efficient simply because it is more powerful. Its advantage is a greater heating rate. Faster does not automatically mean more energy efficient.
2kW vs 3kW Electricity Consumption
| Heater | 1 Hour | 2 Hours | 4 Hours | 8 Hours |
|---|---|---|---|---|
| 2kW | 2kWh | 4kWh | 8kWh | 16kWh |
| 3KW | 3kWh | 6kWh | 12kWh | 24kWh |
Fan Heater vs Tube Heater
| Feature | 2kW/3kW Fan Heater | Tube Heater |
|---|---|---|
| Rapid Warm Up | Excellent | Limited |
| High Heating Output | Yes | No |
| Fan Assisted | Yes | No |
| Background Warmth | Possible | Strong Use Case |
| Frost Protection | Possible | Strong Use Case |
| Noise | Higher | Very Low |
| Air Movement | High | Minimal |
| Workshop Comfort Heating | Stronger | Limited |
| Low Level Continuous Heat | Often Excessive | Stronger Fit |
Choosing The Right Fan Heater For You
- Measure length, width and ceiling height
- Calculate room volume
- Assess wall and roof insulation
- Inspect doors and windows
- Identify avoidable draughts
- Determine normal winter outside temperatures
- Decide your required indoor temperature
- Consider how quickly you need warm-up
- Consider how long the heater will operate
- Check whether 2kW is sufficient
- Consider 3kW where more output is required
- Check the electrical supply
- Read the individual heater instructions
- Avoid unsuitable extension leads and adaptors
- Assess dust and flammable materials
- Consider whether you really need rapid space heating
- Use background heating instead where appropriate
Common Mistakes To Avoid
- Assuming 3kW is always better
- Assuming 2kW is always cheaper overall
- Choosing by floor area alone
- Ignoring ceiling height
- Ignoring insulation
- Ignoring draughts
- Ignoring large doors
- Ignoring outside temperature
- Ignoring target temperature
- Assuming 3kW will heat any workshop
- Assuming 2kW is only for tiny rooms
- Comparing running cost without comparing output
- Assuming 3kW always uses 3kWh every clock hour
- Ignoring thermostatic cycling
- Using an external controller simply because its amp rating looks suitable
- Using unsuitable extension leads
- Plugging several high-output heaters into the same circuit without assessment
- Using fan heating for a job better suited to background heating
- Ignoring workshop dust or flammable materials.
- Buying more heating before reducing obvious heat loss
BH-20R1 Electric Fan Heater 2kW
Best For:
Greenhouses, garages, workshops and other enclosed areas that need a convenient source of additional heat during colder weather.
Why Choose This Product:
The 2kW electric fan heater provides a practical way to introduce warm air into a space, making it useful where a quick boost of heat is needed. Its fan-assisted design helps distribute warm air around the area rather than relying on heat from a single point.
Recommended When:
Use when additional heating is needed during colder periods, particularly for protecting suitable enclosed growing or working spaces from low temperatures. Always follow the manufacturer’s instructions and use the heater in an appropriate, safe environment.
BH-30R1 Electric Fan Heater 3kW
Best For:
Greenhouses, garages, workshops and other suitable enclosed spaces that require a higher level of electric heating during colder weather.
Why Choose This Product:
The 3kW output provides a stronger source of heat than a 2kW fan heater, while the fan-assisted design helps circulate warm air around the space. This makes it a practical option when you need to raise or maintain temperatures more effectively.
Recommended When:
Use when additional heat is required during colder periods, particularly in larger or cooler enclosed areas where a 3kW heater is more suitable. Always follow the manufacturer’s instructions and ensure the heater is used in an appropriate and safe environment.
BH-20R3 Electric Fan Heater 2kW
Best For:
Greenhouses, garages, workshops and other suitable enclosed spaces where additional electric heating is required during colder weather.
Why Choose This Product:
The 3kW output provides a strong source of heat, while the fan-assisted design helps distribute warm air throughout the surrounding area. This makes it a practical option for providing additional warmth when temperatures drop.
Recommended When:
Use when you need reliable supplementary heating during colder periods, particularly in enclosed areas that require a higher heat output. Always follow the manufacturer’s instructions and ensure the heater is used in a suitable and safe environment.
Summary
For most customers, the difference between a 2kW and 3kW fan heater comes down to how much heating capacity the room actually requires. A 2kW fan heater provides 2,000W of rated heating and may be entirely sufficient for smaller, better-insulated spaces or situations where the required temperature increase is modest.
A 3kW fan heater provides 3,000W – 50% more maximum rated output – making it more attractive where faster warm-up or greater heat replacement is required. But neither should be chosen from room size alone.
Frequently Asked Questions
Is A 3kW Heater Better Than A 2kW Heater?
Only where the extra output is useful. A 3kW heater provides 50% more rated heating output, but a 2kW heater may already be sufficient.
Is A 3kW Heater 50% More Powerful Than A 2kW Heater?
Yes, in terms of rated power: 3kW is 50% greater than 2kW.
Will A 3kW Heater Heat A Room Faster?
It has greater maximum heating output and therefore greater potential for faster warm-up. Actual performance depends on heat loss.
Does A 3kW Heater Use 50% More Electricity?
If both heaters operate continuously at maximum rated output for the same time, yes.
How Much Electricity Does A 2kW Heater Use Per Hour?
At continuous full output, 2kWh in one hour.
How Much Electricity Does A 3kW Heater Use Per Hour?
At continuous full output, 3kWh in one hour.
Is A 2kW Heater Enough For A Workshop?
It can be, particularly for smaller or better-insulated workshops. The required output depends on volume, heat loss and desired temperature.
What Size Heater Should I Buy?
Start with room volume, insulation, outside temperature, desired indoor temperature and heat loss, then select sufficient output.
Follow the Instructions
Every gardening product is designed to be used in a specific way. Always read the product label and follow the manufacturer’s instructions before use. Correct preparation, application and timing help ensure the best possible results while promoting safe and responsible use.
Wear Appropriate PPE
Some products may require suitable personal protective equipment (PPE) during handling or application. Depending on the product, this may include gloves, eye protection or protective clothing. Always check the product label to determine the recommended safety precautions before use.
Application Rates
Using more product than recommended will not usually improve performance and may lead to unnecessary waste or undesirable results. Measure accurately, apply evenly and follow the recommended application rates and guidance provided on the product label.
Rhys Nield
As one of our resident product experts, Rhys has spent the last 2 years helping keen gardeners and growers from within our customer services department. Remember to save this page, or visit the Advice Centre, for the latest tips, articles, and expert knowledge, to help you make your garden the best it can be.
BH-20R3 Electric Fan Heater | 2kW
Original price was: £29.89£24.91.£25.71£21.43Current price is: £25.71£21.43. incl. VATex. VAT
TSE-20A Electric Fan Heater | 2kW
Original price was: £40.89£34.08.£22.16£18.47Current price is: £22.16£18.47. incl. VATex. VAT
TSE-30FB Electric Fan Heater | 3kW
Original price was: £43.55£36.29.£36.04£30.03Current price is: £36.04£30.03. incl. VATex. VAT
BH-20R1 Electric Fan Heater | 2kW
£26.49£22.08 incl. VATex. VAT
About Elixir Gardens Supplies
For over 35 years Elixir Garden Supplies have been providing gardeners with all the essentials they need to achieve growing.
Our online store makes sure that all our customers have access to the information they need to make the right decisions when choosing the products they need for their gardens. We know from experience that gardening means many different things to our customers. Whether you have a balcony, patio, lawn or allotment, Elixir Gardens are proud to supply both amateur and professional gardeners alike.
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