Grow Gadgets 2000w Oil Filled Radiator 220-240v

Powerful, Steady Heat for Larger Grow Rooms

The Grow Gadgets 2000W Oil Filled Radiator is a powerful, fan-free grow room heater designed to maintain stable temperatures through autumn and winter without blasting hot air around your growing space.

With up to 2000W of heating power, an adjustable thermostat and a built-in 24-hour timer, it's particularly well suited to larger grow rooms and tents that need reliable background warmth during colder periods or when the grow lights switch off.

The sealed oil inside the radiator is electrically heated and transfers that warmth through the metal fins into the surrounding room. The result is a slower, steadier style of heating than a fan heater, making it ideal for maintaining temperature over longer periods rather than simply delivering short bursts of hot air.

Key Benefits

• Up to 2000W heating power – gives you plenty of capacity for larger or colder grow spaces.
• Oil-filled radiator design – produces steady, even background heat without forced airflow.
• Adjustable thermostat – automatically cycles the heating element to help maintain a more stable temperature.
• Multiple heat settings – adjust the output to suit changing room conditions.
• Built-in 24-hour timer – automate heating around your lighting cycle or the coldest parts of the day.
• Overheat protection – built-in safety cut-out protects the radiator if temperatures rise excessively.
• Fan-free operation – quiet running without introducing another stream of air across the canopy.
• Ideal for lights-off heating – replaces some of the background warmth lost when grow lights switch off.
• Suitable for larger spaces – designed for grow rooms up to around 4m x 4m, depending on insulation and heat loss.
• Portable design – easy to reposition as your grow room layout changes.
• 220–240V operation – designed for standard UK mains power.

Why Use a 2000W Oil Filled Radiator in a Grow Room?

Keeping grow room temperatures stable becomes much harder once outdoor temperatures begin to fall.

This is particularly noticeable with modern LED grow lights. LEDs produce significantly less radiant heat than traditional HPS lighting, so a room that stays comfortable through summer can become surprisingly cold during winter.

The biggest temperature drop often happens during the lights-off period. Once the lighting switches off, hundreds of watts of background heat disappear from the room at exactly the same time that outside temperatures are often falling.

A 2000W grow room radiator gives you the extra heating capacity needed to reduce those temperature swings and maintain a more consistent environment.

Steady Heat Without Forced Airflow

Oil-filled radiators work differently from fan heaters.

Electricity heats the oil sealed inside the radiator, which then transfers that heat through the metal body and into the surrounding air.

Because there is no fan forcing heated air directly into the grow space, the warmth is distributed more gradually and consistently.

This makes an oil filled grow room heater particularly useful when you want steady background heat overnight rather than rapid temperature recovery.

The radiator itself doesn't actively remove moisture from the air, although it's important to remember that relative humidity naturally falls as air temperature rises.

Built-In Thermostat for Automatic Temperature Control

The Grow Gadgets 2000W Radiator includes an adjustable thermostat, allowing it to cycle the heating element according to room temperature instead of simply running continuously.

Once the surrounding temperature reaches the thermostat setting, the heating element switches off. As the room cools again, it switches back on.

This makes it much easier to maintain consistent grow room temperatures while avoiding unnecessary heating when the room is already warm enough.

For the best results, monitor the temperature at canopy height using a separate thermometer or hygrometer rather than relying only on the thermostat control on the radiator itself.

Built-In 24-Hour Timer

The 2000W model also includes a 24-hour timer, giving you another level of control over when the radiator operates.

This is particularly useful if you know your grow room becomes cold at predictable times, such as immediately after the lights switch off or during the coldest part of the night.

You can schedule the radiator around your lighting cycle rather than leaving it available to run throughout the entire day.

Ideal for Larger Grow Rooms

The additional heating capacity makes the 2000W model better suited to larger spaces than the 1000W Grow Gadgets radiator.

As a general guide, the 2000W version is suitable for grow rooms up to around 4m x 4m.

This should always be treated as a guide rather than a guarantee. Actual heating requirements depend on:

• Room insulation
• Outside temperature
• Extraction rate
• Intake air temperature
• Grow light heat output
• Room construction
• How frequently doors or vents are opened

A well-insulated indoor room may require far less heating than an uninsulated shed or garage of the same size.

Perfect for Lights-Off Temperature Control

Grow rooms often experience their biggest temperature swing when the lights switch off.

Your lighting may have been contributing a significant amount of heat to the room for hours, then that heat source suddenly disappears.

The Grow Gadgets 2000W Oil Filled Radiator is particularly useful for maintaining background warmth through the dark period, helping prevent the room from rapidly becoming too cold overnight.

Its gradual heating style also suits longer periods of use, where maintaining a stable temperature is more important than heating the room as quickly as possible.

2000W Radiator or Fan Heater?

The best heater depends on the problem you're trying to solve.

A fan-assisted heater is better if you need to raise the room temperature quickly. Heated air is immediately blown into the grow space, so temperature recovery is faster.

An oil filled radiator takes longer to warm up but provides a steadier source of heat once it's operating.

For maintaining overnight temperatures in a larger grow room, we'd normally favour the 2000W radiator.

If you're trying to recover a very cold room quickly, take a look at one of our fan-assisted grow room heaters instead.

Add Probe-Based Thermostatic Control

If you want tighter temperature control than the radiator's built-in thermostat provides, pair it with the Grow Gadgets Thermostat Controller.

The controller includes a separate temperature probe, allowing you to measure the temperature closer to canopy height rather than at floor level beside the radiator.

It's rated for loads up to 6000W, so it has plenty of capacity to control the 2000W radiator.

This is the option we'd choose instead of the older RF Wireless Thermostat if you're setting up temperature control from scratch.

How to Use the Grow Gadgets 2000W Oil Filled Radiator

1. Position the radiator safely: Place it upright on a stable, level surface away from standing water and irrigation equipment.
2. Leave clear space around it: Don't push the radiator directly against tent walls, equipment or other objects.
3. Select your heat setting: Start at a lower setting where possible and increase output if the room isn't reaching the required temperature.
4. Set the thermostat: Adjust the thermostat and allow enough time for the room temperature to stabilise.
5. Use the timer if required: Programme heating around lights-off periods or the coldest hours of the day.
6. Measure at canopy height: Use a separate thermometer or probe to check the temperature where your plants are actually growing.
7. Fine-tune gradually: Oil-filled radiators take time to warm up, so avoid making large adjustments before the room has had time to respond.

Our Take

If you're trying to maintain the temperature of a larger grow room overnight, we'd choose the 2000W radiator over the 1000W version simply because it gives you much more heating headroom.

The real advantage of an oil-filled radiator is consistency. It isn't trying to blast the room with hot air; it gradually adds background warmth and then lets the thermostat cycle the heating element as required.

The built-in timer is particularly useful on this version because grow room heating demand often follows the lighting schedule. You can have it available during lights-off and avoid heating unnecessarily when your lights are already keeping the room warm.

For larger LED rooms, garages, lofts and colder indoor spaces, it's a very straightforward winter heating option.

Tech Specs

• Product: Grow Gadgets 2000W Oil Filled Radiator
• Heater type: Oil-filled electric radiator
• Maximum power: 2000W
• Voltage: 220–240V
• Heat control: Multiple heat settings
• Temperature control: Adjustable thermostat
• Timer: Built-in 24-hour timer
• Safety: Built-in overheat cut-out
• Operation: Fan-free radiant and convection heating
• Recommended grow space: Up to approximately 4m x 4m, depending on room conditions
• Suitable for: Larger grow rooms, grow tents and supplementary winter heating
• Best use: Background heating and lights-off temperature control

Explore Our Full Grow Room Heating Range

Need a smaller heater or something that warms the room faster? Browse our full grow room heating range, including the 1000W Oil Filled Radiator, 2kW and 3kW fan-assisted greenhouse heaters, tube heaters and thermostat controllers.

Top Tip: Don't wait until the room is already freezing before switching an oil-filled radiator on. They're at their best when used to maintain temperature rather than recover it. Use the built-in timer or a Grow Gadgets Thermostat Controller to bring the heater in before the temperature falls too far.