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Long story short: The De’Longhi Comfort Temp Full Room Radiant Thermostat is the best oil filled space heater overall.

Welcome to our comprehensive guide on the best oil-filled heaters for 2023. If you’re in the market for a new space heater, specifically a radiator heater that uses oil inside, then you’ve come to the right place!

Our team has vetted each of the heaters in this article to provide you with a detailed comparison of the top oil-filled radiator heaters, reviews, and buying guide to help you make an informed decision. Read on to discover which heater is best suited to meet your heating needs. 

6 best oil filled space heaters

Before we dive into the specifics of each radiator heater, let’s compare their key features at a glance.


Best oil filled space heater overall

De’Longhi Comfort Temp Full Room Radiant Thermostat



Best for big rooms

Comfort Zone Oil-Filled Electric Radiator Heater



Most quiet

PELONIS Electric Oil-Filled Radiator Heater



Best with child lock

Dreo Oil Filled Radiator, Electric Radiant Heater



Most compact

Air Choice Oil Filled Radiator Heater with Thermostat



Most powerful

COSTWAY Oil Filled Heater, 1500W Portable Space Heater with Adjustable Thermostat


6 best oil-filled heaters in 2023

Now, let’s take a closer look at the top 6 oil-filled radiator heaters based on our expert analysis:

1. De’Longhi Comfort Temp Full Room Radiant Thermostat – Best overall

The De’Longhi Comfort Temp Full Room Radiant Thermostat is our top pick for the best overall oil-filled radiator heater. With its advanced heating technology and user-friendly thermostat, this heater ensures optimal comfort and energy efficiency.

Its portable design allows you to easily move the heater from room to room, providing consistent and reliable heat wherever you need it.

The Delonghi oil heater is a highly effective and efficient solution for maintaining optimal room temperature. What makes it the best is the key features, including its Comfort Temp technology which provides maximum energy savings and automatic heat distribution allowing for consistent room temperature.


  • Energy efficient
  • Easy portability
  • Safety features like automatic shut-off and anti-freeze setting


  • Slightly noisy during operation, although this is minimal and should not be a significant bother

Who Should Buy This?

Given its features and user reviews, the De’Longhi Comfort Temp Full Room Radiant Thermostat is ideal for homeowners looking for an effective and cost-efficient method to heat their rooms in a hassle-free manner. 

2. Comfort Zone Oil-Filled Electric Radiator Heater – Best for big rooms

The Comfort Zone Oil-Filled Electric Radiator Heater offers a powerful heating solution with its 1500-watt heater. This heater is perfect for larger rooms and provides even heat distribution through its oil. It’s our pick for the best oil filled space heater for large room needs. 

Its adjustable thermostat allows you to effortlessly control the room temperature, ensuring maximum comfort throughout the day and allowing you to fine-tune the temperature to your liking. It’s easy to use and ensures your comfort throughout the day without constant manual adjustments.

With built-in wheels and a convenient handle, moving this heater from one room to another is a breeze. 

It’s a versatile heating solution for various areas of your home. This radiator heater operates quietly, making it ideal for use in bedrooms, offices, or any place where you need peace and quiet while staying warm.

Like many oil-filled heaters, this unit may take a little time to heat up initially. It’s not as instant as some other types of heaters, so it’s best to plan ahead if you want your room to be warm right away. Also, the heater can be quite heavy due to the oil-filled design, which may make it less convenient to carry up and down stairs or between rooms.


  • Quickly warms up even the most spacious rooms
  • Even heat distribution eliminates cold spots and makes big rooms cozy 
  • Adjustable thermostat
  • Quiet and portable thanks to its wheels


  • The initial warm-up time is a bit longer than other portable space heaters
  • On the heavy side

Who Should Buy This?

The Comfort Zone Oil-Filled Electric Radiator Heater is an excellent choice for those who have larger rooms or spaces that need consistent and efficient heating. Its adjustable thermostat and even heat distribution make it perfect for maintaining a comfortable temperature throughout the day.

Whether you need to heat a living room, office, or bedroom, this heater offers a quiet and reliable solution. However, if you require instant heat or need a highly portable heater, you might want to consider other options.

3. PELONIS Electric Oil-Filled Radiator Heater – Most quiet

The PELONIS Electric Oil-Filled Radiator Heater is a reliable and efficient choice for heating your space. It’s the best radiator oil filled electric heater if you really need something that’s quiet.

One of the standout features of this heater is its silent operation. You won’t be disturbed by any loud fan noises or clanking sounds, making it perfect for use in quiet environments like bedrooms or offices.

Its unique design and high-quality construction make it a durable option that will last for years to come. This heater uses oil to provide consistent and gentle heat, making it ideal for bedrooms, offices, and living rooms.

Oil-filled radiators are known for their energy efficiency, as they continue to emit heat even after they’re turned off. This can help you save on your energy bills. It maintains a comfortable temperature without causing hot spots.

With its sturdy caster wheels and built-in handle, moving this heater from one room to another is a breeze. You can easily relocate it to where you need the warmth the most. PELONIS has also incorporated several safety features into this heater, including overheat protection and a tip-over switch. These ensure your peace of mind when using it, especially around children or pets.

While this heater provides consistent warmth, it may take a bit longer to reach the desired temperature compared to some other types of heaters. Also, the PELONIS Electric Oil-Filled Radiator Heater can be a bit bulky, which might not be suitable for small spaces with limited floor space.


  • Efficient and even heating throughout the room
  • Silent operation
  • Adjustable thermostat
  • Portability
  • Safety features
  • Energy efficiency


  • Slow heating
  • Size

Who Should Buy This?

The PELONIS is an excellent choice for individuals looking for an energy-efficient, silent, and reliable heating solution. It’s ideal for bedrooms, offices, and living rooms where quiet operation is essential. If you prioritize safety features and want a heater that can be easily moved around, this model is one of the better heaters you can buy.

However, if you need rapid heating or have very limited space, you may want to explore other heater options. Overall though, the PELONIS heater offers efficient, long-lasting warmth with the added bonus of peace and quiet.

4. Dreo Oil Filled Radiator, Electric Radiant Heater – Best with child lock

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If you’re looking for a sleek and modern oil-filled radiator heater that’s safe for a household with little ones, then Dreo Oil Filled Radiator is the perfect choice.

As our pick for best oil filled space heater for small spaces, this tower heater provides excellent heating performance and adds an elegant touch to any room. Its compact design and easy-to-use controls make it a convenient option for small spaces.

Its compact footprint is a huge advantage for those with limited space. You can place it in tight corners or small rooms without sacrificing too much floor space. The Dreo Oil Heater excels in heating small spaces. It quickly warms up the room, making it perfect for chilly winter nights.

The Dreo comes equipped with safety features like overheat protection and a tip-over switch, providing peace of mind when using it around pets or children.

The controls are straightforward and user-friendly. You can easily adjust the temperature and set the timer according to your preferences. This heater’s tower-style design is not only functional but also aesthetically pleasing. It blends seamlessly with modern decor and doesn’t look like an eyesore in your living space.

As far as cons go, this heater can produce a slight humming noise when in operation. It’s not excessively loud, but if you’re sensitive to background noise, it might be noticeable. And compared to some other heaters on the market, the Dreo can be slightly more expensive. However, its performance and design may justify the higher cost for some buyers.

Lastly, while it’s great for small spaces, this heater may struggle to heat larger rooms effectively. It’s essential to consider your room size before purchasing.

Nevertheless, the Dreo Oil Filled Radiator, Electric Radiant Heater offers efficient heating, a sleek design, and ease of use, making it an excellent choice for safety-minded parents, especially for those who prioritize aesthetics in their heating solutions.


  • Efficiently heats up small spaces fast
  • Compact and sleek
  • Easy to use
  • Strong safety features


  • Noticeable noise

Who Should Buy This?

The Dreo Oil Filled Radiator, Electric Radiant Heater is an excellent choice for individuals looking to heat small spaces efficiently and safely while maintaining a modern and stylish aesthetic. It’s ideal for apartment dwellers, a home office, or even as a heater in the bathroom.

5. Air Choice Oil Filled Radiator Heater with Thermostat – Most compact

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The Air Choice Oil Filled Radiator Heater with Thermostat lives up to its name by providing quiet and efficient heating. This heater is equipped with a silent operation mode that ensures a peaceful environment while keeping you warm.

Its compact size and portable design make it an excellent choice for bedrooms, offices, and nurseries.

The standout feature of the Air Choice is its whisper-quiet operation. Even at maximum heat output, this oil-filled radiator heater won’t disrupt your peace and quiet, making it perfect for bedrooms, libraries, and study spaces.

Despite its hushed demeanor, the Air Choice provides efficient and even heating for a solid 120 square feet. The oil-filled design retains warmth for an extended period, ensuring a comfortable and consistent temperature in your chosen space.

The adjustable thermostat allows you to fine-tune the temperature to your liking, too. It provides a range of heating options, ensuring you stay cozy in varying weather conditions.

Some users may miss the convenience of a remote control to adjust settings from a distance. Like most oil-filled radiators, the Air Choice may take some time to reach its maximum heating capacity. It’s not the best option for those seeking rapid heat production.

Still, the Air Choice Oil Filled Radiator Heater with Thermostat delivers on its promise of quiet and efficient heating, making it a valuable addition to your space during the colder months. While it may not be the fastest heater to warm up a room, its whisper-quiet operation and safety features make it an attractive option for many users.


  • Silent operation
  • Efficient heating
  • Portable and compact
  • Adjustable thermostat


  • Slow warm-up
  • No remote control

Who Should Buy This:

The Air Choice Oil Filled Radiator Heater with Thermostat is one of the best oil filled space heater choices for anyone seeking a peaceful and efficient heating solution for their home or office. It’s particularly well-suited for light sleepers; in bedrooms, home offices, nurseries, or other spaces where silence and warmth are paramount.

6. Costway oil filled heater – Most powerful

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The Costway Oil Filled Heater is a well-designed piece of heating equipment, integrating several crucial features that make it a strong contender in the home heating market. Its powerful 700W output, adjustable thermostat, and energy-saving modes make it greatly efficient and versatile.

One major pro is its quiet operation, a feature many customers appreciate, and the fact that it continues to heat the room even after it is turned off due to its oil-filled nature. It also boasts a slim design and a portable build with a carry handle. 

However, one noteworthy con includes the time it takes for the heater to heat up due to its oil-filled design. While this may not be a concern for many, those needing immediate heat might find it inconvenient.


  • Powerful but quiet
  • Energy saving and efficient 
  • Adjustable thermostat
  • Wheels for easy room-to-room portability


  • Takes a while to get going

Who Should Buy This?

This best oil filled space heater could be ideal for those who want a portable, efficient, and quiet heater for medium-sized to small rooms. With its functionality and cost-effectiveness, it can be a perfect addition to any household or office space. 

Buying guide for the best oil-filled heater

Best Oil Filled Space Heater

When shopping for the best radiator, there are several factors to consider. Let’s delve into the key points to help you make an informed purchase decision:

What is an oil-filled radiator heater?

An oil-filled radiator heater is a type of space heater that uses oil inside to generate heat. It consists of a series of metal fins or columns that are filled with diathermic oil.

When the heater is turned on, the oil inside is heated, and the heat is then radiated into the room. 

These heater models are often portable and are designed to heat a room efficiently and effectively.

Benefits of oil-filled radiator heaters

Best Oil Filled Space Heater

There are several benefits that’d make you want to choose the best oil filled electric space heater:

  • Efficient Heating: Oil filled space heaters provide a steady and consistent heat output, ensuring that your room is heated evenly.
  • Energy Efficiency: These heaters are designed to retain and radiate heat, making them more energy-efficient compared to other types of heaters.
  • Portability: Many oil filled space heaters come with built-in wheels or handles, making them easy to move from room to room.
  • Quiet Operation: Oil-filled radiator heaters don’t typically make a lot of noise – although some are louder than others.

7 things to look for in an oil electric heater

Best Oil Filled Space Heater

In the ever-evolving world of home heating solutions, oil-filled radiator heaters have carved out a niche for themselves, providing efficient and cost-effective warmth to households across the globe.

If you’re in the market for a new heater or looking to upgrade your existing one, you’ve come to the right place. 

We understand the importance of making an informed decision when it comes to your home’s comfort, and that’s why we’ve compiled this comprehensive guide on the factors to consider when buying an oil-filled radiator heater.

Before you make your purchase, consider the following factors:

1. Heating Capacity

When it comes to heating your living space efficiently, the heating capacity of your radiator heater plays a pivotal role. It’s essential to assess the size of the room or area you intend to heat and make sure the heater works with an appropriate heating capacity. Overloading a small room with a high-capacity heater can lead to discomfort and energy wastage, while an underpowered heater won’t effectively warm a larger space.

2. Energy Efficiency

In today’s eco-conscious world, energy efficiency is a paramount concern for many homeowners. Oil-filled radiator heaters are known for their energy efficiency, but there are variations within the market. Look for models with energy-saving features such as adjustable thermostats and timers, which allow you to customize your heating experience while conserving energy and reducing your utility bills.

3. Portability and Size

The portability of your heater can greatly impact its usability. Consider whether you need a heater that can be easily moved from room to room. Some models come with built-in wheels or handles for convenient transportation. 

The heater’s size is crucial, especially if you have limited space. Compact designs can be ideal for smaller rooms or apartments.

4. Safety Features

Safety should always be a top priority when choosing any heating appliance. Look for heaters equipped with features such as overheat protection and tip-over switches.

Overheat protection ensures that the heater automatically shuts off if it becomes too hot, preventing potential fire hazards. 

Tip-over switches cut power to the unit if it is accidentally knocked over, reducing the risk of accidents.

5. Noise Level

A noisy heater can be a constant source of irritation, particularly if it’s placed in a bedroom or workspace. When shopping for an oil-filled radiator heater, consider the noise level it generates. Many modern models are designed to operate quietly, ensuring minimal disruption to your daily activities.

6. Design and Aesthetics

While functionality is paramount, the aesthetics of your heater also matter. Radiator heaters come in various designs, from classic to contemporary, allowing you to choose one that complements your interior decor. Some models even offer a choice of colors to match your personal style.

7. Controls and Settings

Look for a heater with adjustable thermostat settings and multiple heat settings to customize your comfort level. 

  • Thermostat: A thermostat in a heater will help you set your desired temperature for the room. Once it reaches that temperature, the heater will automatically turn off, and when the temperature drops, it will turn on again.
  • Heat Settings: Depending on your comfort level, you might prefer a cooler or warmer environment. Look for a heater that comes with multiple heat settings – low, medium, and high – so you can adjust it according to your wish.
  • Timer: Some heaters also come with a timer feature, which can be useful when you are going to bed or leaving the house. You can set the heater to automatically turn off after a certain period, conserving energy and ensuring the heater doesn’t run unnecessarily.
  • Adjustable Louvers: If you want the warm air to circulate in a specific direction or area, having a heater with adjustable louvers will be beneficial.
  • Remote control: Consider buying a heater with a remote control for convenience, especially if the heater will be placed in hard-to-reach areas. 
  • Energy-Saving Modes: Some heaters are equipped with an energy-saving mode, which adjusts the power output to maintain a comfortable temperature while saving energy.
  • Noise Level Control: If the heater will be used in a quiet environment, like your bedroom or office, you might want to consider its noise level. Some heaters have a quiet setting to reduce operation noise.
  • Smart/Home Assistant Capabilities: For those who have smart homes or use home assistants like Alexa or Google Home, it’s also worth looking at heaters that could be controlled through these devices.
  • Digital Display: A heater with a digital display is useful as it allows you to see the current setting and temperature at a glance. 

How the best oil filled space heater saves you money on energy

The best oil filled radiator space heaters are designed with energy efficiency in mind, which can save you money on your energy bills. 

These heaters use the principle of convection to heat a room, which means they create a natural circulation of warm air.

The diathermic oil used in these heaters retains heat and releases it gradually, resulting in longer-lasting and more efficient heating.

Additionally, many oil-filled heaters have programmable timers and thermostats, allowing you to easily control the temperature and duration of heating, further optimizing energy usage.

Best oil filled radiator heaters and environmental impact

When it comes to the environmental impact, oil-filled radiator heaters are considered to be more eco-friendly compared to other types of heaters. These heaters do not require fuel combustion or produce any emissions, making them a cleaner heating option.

Additionally, the oil used in these heaters does not evaporate or need to be replaced, resulting in less waste. Choosing an energy-efficient oil-filled radiator heater can contribute to reducing your carbon footprint and creating a greener environment.

Oil heater vs ceramic heater

Now that we’ve examined the individual features of oil heaters and ceramic heaters, it’s time to compare them directly to help you decide which one aligns better with your heating needs.

1. Heating method

  • Oil heaters: Radiant Heat
  • Ceramic: Convection Heat

The primary difference between the two lies in their heating methods. Oil heaters use radiant heat, which warms objects and people directly, while ceramics rely on convection heat, which heats the surrounding air.

2. Energy efficiency

  • Oil heaters: Energy-efficient for longer heating cycles
  • Ceramic: Energy-efficient for rapid heating

Oil heaters excel in energy efficiency when used for extended periods, thanks to their ability to retain heat. On the other hand, ceramic ones are energy-efficient for quickly warming up spaces.

3. Speed of heating

  • Oil heaters: Gradual heating
  • Ceramic: Rapid heating

Ceramic heaters are the winners when it comes to speed, providing near-instant warmth. Oil heaters take more time to reach their full heating capacity.

4. Noise levels

  • Oil heaters: Silent operation
  • Ceramic: Low hum

If noise is a concern, oil heaters are the quieter option. Ceramic tends to produce a gentle hum while operating.

5. Portability

  • Oil heaters are equipped with wheels for easy movement
  • Ceramic: Lightweight and portable

Both types of heaters offer portability. Oil heaters often come with wheels, while ceramic ones are designed to be lightweight and easy to carry.

6. Safety features

  • Oil: Overheat protection, tip-over switch
  • Ceramic: Overheat protection, tip-over switch

Safety is a priority for both heater types. They typically include features like overheat protection and tip-over switches to prevent accidents.

7. Heating capacity

  • Oil: Suitable for various room sizes
  • Ceramic: Ideal for personal or small to medium-sized spaces

Oil heaters come in different sizes to accommodate various room sizes, while ceramic is well-suited for personal use or for heating smaller to medium-sized areas.

Choosing the right heater for your needs

Now that you have a clear understanding of the differences between ceramic and oil heaters, let’s discuss some scenarios where one might be more suitable than the other:

When to choose oil

  • You prefer silent operation, especially in bedrooms or quiet workspaces.
  • Energy efficiency over extended periods is a priority.
  • You need to heat larger rooms or open spaces.
  • You value a gradual and consistent heating

When to choose ceramic

  • Quick, rapid heating is essential, such as in bathrooms or chilly mornings.
  • You require a portable heater that can be easily moved between rooms.
  • Targeted heating for personal comfort or supplementing the warmth in a room is your goal.
  • A gentle hum from the heater’s operation is not a concern.

Energy efficiency and cost considerations

When choosing between an oil heater and a ceramic heater, energy efficiency and operating costs are important factors to consider. Here’s a breakdown of how these two heaters compare in terms of energy efficiency:

Oil efficiency

  • Oil heaters are highly efficient for long heating cycles. They heat the oil-filled reservoir and then emit heat gradually over time.
  • Because they retain heat well, oil heaters can maintain a comfortable temperature in a room even after they have turned off.
  • This efficiency can result in lower energy bills over the long term, especially in larger spaces where the heater runs less frequently.

Ceramic efficiency

  • Ceramic is known for its rapid heating capabilities, making heaters made from the material efficient for quickly warming up spaces.
  • However, they cycle on and off frequently to maintain the desired temperature, which can result in higher energy consumption in the long run.
  • In smaller rooms or for short bursts of heating, ceramic can be cost-effective due to speed.

It’s essential to consider your specific heating needs and usage patterns when evaluating energy efficiency and operating costs.

Comparing the environmental impact of both

  • Oil heaters are considered relatively eco-friendly because they use electricity to heat the oil, which then radiates heat.
  • They do not emit greenhouse gases or produce any combustion byproducts, making them a clean heating option.
  • Ceramic heaters are also considered environmentally friendly since they use electricity to generate heat through ceramic plates.
  • Like oil heaters, they do not produce harmful emissions during operation.

Both types of heaters are considered environmentally responsible compared to traditional heating methods that rely on fossil fuels like natural gas or heating oil.

Maintenance tips for oil filled heaters

  • Regularly check the power cord for any signs of damage or wear.
  • Clean the heater’s exterior with a soft, damp cloth to remove dust and dirt.
  • Inspect the oil reservoir for leaks and replace it if necessary.
  • Test the heater’s safety features, such as the tip-over switch and overheat protection, to ensure they are functioning correctly.

Final thoughts on the best oil filled heater

Space heaters can be used to warm up small areas to whole homes if used correctly! While oil radiator heaters are generally much the same, they’re not all equal.

From all our hours of research, we found that the best energy efficient electric heater overall is the De’Longhi Comfort Temp Full Room Radiant Thermostat.

That said, there are lots of best radiator heater options for you depending on what matters most! 

Whether you just want a room heater or to use the heater for your home and heat up the space totally, the right one is waiting to warm you up!

FAQs – Oil type of heater

What is an oil filled radiator heater?

An oil filled radiator heater is a type of space heater that uses oil as a heat transfer medium. The oil is heated and circulated through the radiator, which then radiates heat into the surrounding space.

How does an oil filled radiator heater work?

Oil heaters work by using electricity to heat up the oil inside the heater. As the oil heats up, it circulates through the radiator fins, releasing heat into the surrounding environment. The heated oil will continue to provide warmth even after the heater is turned off.

Are oil filled radiator heaters safe to use?

Yes, they are designed with safety features such as overheat protection and automatic shut-off in case the heater gets too hot. However, it is still important to use caution and follow the manufacturer’s instructions when using an oil-filled heater.

Can I leave an oil filled radiator heater unattended?

It is not recommended to leave any space heater, including oil filled radiator heaters, unattended. While they are generally safe to use, it is always better to be cautious and turn the heater off when you are not in the room or when you go to bed.

How long does it take for an oil filled radiator heater to heat up a room?

The time it takes for an oil filled radiator heater to heat up a room depends on several factors such as the size of the room, insulation, and temperature setting. Generally, it may take anywhere from 30 minutes to a few hours to heat up a room using an oil filled radiator heater.

Are oil filled radiator heaters energy efficient?

Yes, oil filled radiator heaters are generally considered energy efficient. They use electricity to heat up the oil and the oil then provides continuous heat even after the heater is turned off. This makes them a good option for anyone looking to save on energy costs.

Can oil filled radiator heaters be used in any room?

Yes, oil filled radiator heaters can be used in any room as long as there is a power outlet available. However, it is important to consider the specific heating needs of each room and choose the appropriate size and wattage of the heater.

What are the benefits of using an oil filled radiator heater?

Some benefits of using an oil filled radiator heater include silent operation, even heat distribution, and the ability to retain heat even after the heater is turned off. They are also portable and easy to move around since most models come with wheels.

How do I clean and maintain an oil filled radiator heater?

To clean an oil filled radiator heater, you can use a soft cloth or brush to remove any dust or debris from the surface. You should also check the manufacturer’s instructions for any specific cleaning guidelines since every space heater is slightly unique. It is also recommended to regularly inspect the heater for any signs of damage and have it professionally serviced if needed.

Are oil filled radiator heaters noisy?

No, oil filled radiator space heaters are generally silent during operation. Unlike other types of space heaters that use a fan to distribute heat, oil filled radiator heaters do not have any moving parts that can create noise.