Best Oil Filled Heater Reviews (Buying Guide 2017)

Oil filled heaters are one of the best ways of keeping a room warm during the cold season.

But did you know that using an oil filled radiator can also help you save money?

Read the following article to find out which is the best oil filled heater to buy for your home, and how to use it efficiently.

Our comprehensive buying guide will show you the best features for an oil radiator in 2017, and how to make sure you pick the right model.

Check out our oil filled heater reviews to find out which are the best selling models in 2017, and learn their pros and cons.

Now sure whether you should buy a convection heater or an oil filled radiator? We prepared an honest comparison for you, so you should make an informed decision on the matter.

oil filled heater reviews
  • DeLonghi TRD0715T
  • Amps: 12.5
  • Watts: 1500
  • Area heated: 350 sq ft
  • Heating technology type: radiant
  • Voltage: 115
  • Settings: 3 + adjustable thermostat
  • Dimensions: 9.45 x 25.59 x 14.17
  • Other: Anti-Freeze Setting, Automatic Shutoff, Thermostat, Timer, Wheels
top oil filled space heaters
  • DeLonghi TRD40615E
  • Amps: 12.5
  • Watts: 1500
  • Area heated: 100 sq ft
  • Heating technology type: radiant
  • Voltage: 115
  • Settings: 3 + adjustable thermostat
  • Dimensions: 6.5 x 25 x 16
  • Other: ACLI Safety Plug, Anti-Freeze Setting, Automatic Shutoff, Thermostat, Timer
best oil filled heater
  • DeLonghi EW7707CM
  • Amps: 12.5
  • Watts: 1500
  • Area heated: 144 sq ft
  • Heating technology type: radiant
  • Voltage: 120
  • Settings: 3 + adjustable thermostat
  • Dimensions: 13.78 x 24.8 x 5.9
  • Other: Anti-Freeze Setting, Automatic Shutoff, Nonslip Base, Thermostat, Wheels
best rated oil filled heaters
  • DeLonghi TRO715L
  • Amps: 12.5
  • Watts: 1500
  • Area heated: 100 sq ft
  • Heating technology type: radiant
  • Voltage: 120
  • Settings: 3 + adjustable thermostat
  • Dimensions: 14 x 9 x 25
  • Other: Anti-Freeze Setting, Automatic Shutoff, Thermostat, Wheels
best oil filled electric radiators
  • NewAir AH-450B
  • Amps: 12.5
  • Watts: 1500
  • Area heated: 150 sq ft
  • Heating technology type: radiant
  • Voltage: 120
  • Settings: 3 + adjustable thermostat
  • Dimensions: 9.25 x 24.5 x 14.25
  • Other: Automatic Shutoff, Digital Display, Handle, Remote Control, Thermostat, Timer, Tip-Over Safety Switch, Wheels
portable small radiator
  • Kenmore NY15ER-7
  • Amps: 12.5
  • Watts: 1500
  • BTUs: 5100
  • Heating technology type: radiant
  • Voltage: 120/110
  • Settings: 3 + adjustable thermostat
  • Dimensions: 8 x 6.38 x 25
  • Other: Automatic Shutoff, Thermostat, Wheels

Top 6 Oil Filled Heaters in 2017

DeLonghi EW7707CM Oil Filled Heater

best oil filled heaterThis oil filled radiator has a 1,500 Watt heat output, enough for heating a medium or large room.

The whole construction is made out of high-quality steel, and the oil reservoir is permanently sealed, so you will never have to refill the oil, no matter how long you use the heater.

This unit has three heat settings you can use, as well as an adjustable thermostat, so you can customize the heat output to fit any space, large or small. The heater also has a ComforTemp Button you can use to automatically maintain the room’s temperature while cutting the energy costs.

The thermal slots are specially designed to maximize the heat transfer area and the heat flow, but to maintain a low temperature on their surface.


  • Anti-freeze Feature – This is a great feature to have, especially if you own a holiday house, or if you’re away from your home for longer periods of time. This feature enables the radiator to start automatically if the temperature gets lower than 44 degrees F, so you will find the home comfortably warm when you return.
  • Safety Features – This model uses several safety features to lower the risk of using it. The edges of the metal fins are rounded so it won’t represent a danger to kids or pets, and the thermal shut-off feature cuts off the unit’s power if the heater gets too hot.


  • ComforTemp Feature Could Be Better – This feature is supposed to make the unit work without consuming so much electricity. It does this, but it could be better optimized for different temperatures.
  • ComforTemp Button Is Bright – When this feature is used, a bright green light is turned on and stays on. This light might be too bright to use in a bedroom at night.


DeLonghi TRD0715T Oil Filled Space Heater

oil filled heater reviewsThis unit has the heating capacity of 1,500 Watts and should be able to heat a medium room. The heater uses a patented way of delivering heat through thermal chimneys while keeping the temperature at its surface low.

This oil filled radiator has three temperature settings and a thermostat, allowing you to choose the perfect temperature for every room you use.

You can use the programmable timer to schedule the heater to work only when necessary, conserving energy and lowering your heating bills at the same time.

The whole construction is made out of rust-resistant, durable metal so you’ll be able to use it at full capacity for a long period of time.


  • 24 Hour Programmable Timer – This timer represents a great way to lower your heating bills. You don’t need to leave the heater running when you’re at work only to make sure it will be warm when you get back. All you need to do is to set the heater to start before you get home to make sure you’ll find a comfortable temperature.
  • Safe – The unit stays does not get hot, and doesn’t have sharp edges, making it safe enough to work when there are children or pets in the room.


  • Vertical Heat Delivery – This heater’s patented technology makes it less efficient than other units with the same heating capacity.
  • Slow Programming – This unit’s 24-hour timer is great, but setting the timer is a long and tedious process.


DeLonghi TRD40615E Full Room Radiant Heater

top oil filled space heatersThis oil filled radiator gas a heating capacity of 1,500 Watts and should be enough for heating a medium or large room.

The casing is made out of patented high-quality steel, offering up to 40% more surface on which the warm air can radiate from, leading to a faster warmth delivery than other oil filled heaters.

This model has a digital control panel you can use to adjust the thermostat’s values, set the timer, and select the heat settings. You can choose to use the ECO function of the heater which will adjust the power and heat settings to maintain the room’s temperature while using less electricity and lowering your heating bills.


  • Anti-freeze Feature – You can use this feature to make sure your pipes won’t freeze during the cold season, especially if you’re away from home for longer periods of time, or if you own a vacation house. Just place the heater next to the most vulnerable areas of your pipes, select this feature, and once the temperatures drop under 44 degrees F, the heater will automatically start.
  • Large Heating Surface – Due to the fact that this unit has a larger surface the heat can radiate from, it will provide more heat than other models with a similar heating capacity.


  • Noisy – Unlike most oil filled space heaters, which run without making notable sounds, this heater is noisy. The noises it makes when it turns from on to off can disturb some people when they try to sleep.
  • Display Gets Dim Too Fast – It’s usually good for the display to get dim, so it won’t bother you at night, but this unit’s display gets dim so fast you don’t have time to read the heat indicator.


DeLonghi TRO715L Oil Filled Heater

best rated oil filled heatersDeLonghi’s oil filled space heater has the heating capacity of 1,500 Watts, enough for heating a medium to large room.

The whole construction is made out of durable, rust-resistant metal construction. This radiator has seven metal fins specially designed to increase the heat transfer surface. The edges of the fins are slightly rounded, so they don’t represent a hazard for children or pets.

This unit’s wheels don’t need tools to fit into place. They snap in and out of their position whenever you need, making the model highly portable but easy to store at the same time. Even the unit’s cord can be wrapped around for easier storage.


  • Safe – This unit has rounded edges and benefits from additional safety features like the thermal cut-off, making it safer than other oil filled radiators.
  • Anti-freeze feature – This unit benefits from an anti-freeze feature, making it perfect for stopping your pipes from freezing. Place this unit in your basement when the cold season starts, and as soon as the temperatures drop below 44 degrees F, the unit will start producing heat, keeping the pipes above freezing levels.


  • Small Casters – This model’s casters are small to the overall construction of the heater, so you might have some trouble pushing the unit around the house, especially on carpeted surfaces, where they can be difficult to maneuver.
  • Only One Handle – This unit has a handle only on one side, so if you have to lift it over thresholds or stairs you might have some trouble gripping it. This makes the unit less portable when it gets hot, as well.


NewAir AH-450B Electric Oil-Filled Space Heater

best oil filled electric radiatorsThis oil filled space heater produces 1,500 Watts of heat, enough for a small space of up to 150 square feet.

The heater has an easy to use display panel, allowing you to switch between the three heating options, the five temperature settings, and to set the timer up to ten hours.

The great thing about this unit is that you can set it to turn on, as well as off. Most heaters only have a turn-off feature, but you can set this model’s timer when the unit is off and it will start after those hours pass. This is a great way to make sure the unit isn’t working when the home is empty, but you still find the house comfortably warm when you get back from work.


  • Remote Control – This model comes with a fully functioning remote control you can use to change all the settings without getting out of bed, or without going close to the radiator.
  • Turn-On Timer – The turn-on timer is a great addition to every model and will help you lower the electricity bills.


  • Short Power Cord – This unit has a short power cord, so placing it might be tricky to some. You can use a heavy-duty extension cord to place the unit wherever you want, but that will cost you extra.
  • It Doesn’t Stop – This unit’s thermostat will still keep the unit running for three minutes every half an hour, even though the set temperature is exceeded. This will only add to the warmth and can lead to an uncomfortably hot room.


Kenmore Oil-filled Radiator Heater White – Large Room Heating

portable small radiatorThis unit has the heating capacity of 1,500 Watts, producing enough heat for a large room when it’s working on its highest setting.

The heater can work on three different heating settings – Low, producing 600 Watts, Medium, producing 900 Watts, and High, producing 1,500 Watts – so you can adapt the power for every room in your house.

The whole construction is made out of high-quality metal and it’s power coated to withstand rust or scratches. This makes the unit durable, and you’ll be able to use it for a long period of time.

The heater has an automatic shut-off feature which will cut out the unit’s power if it gets too hot. This is a great feature, as it minimizes the chance of it becoming a fire hazard.


  • Great Heating Capacity – This unit’s heating capacity exceeds expectations and it’s higher than other models with the same Wattage.
  • Works Well In Poorly Insulated Rooms – This unit’s high heating capacity make it work well in poorly insulated areas, or in larger rooms. The unit might need some time to warm up all the air in such a space, but once it’s warmed it will maintain a constant temperature without trouble.


  • Small Casters – This model’s casters are small compared with the whole construction. This will make the model slightly hard to maneuver, and you might have troubles getting it to roll over carpeted surfaces. When the casters won’t work, the one-sided handle won’t help you much with lifting it.
  • No Timer – This unit does not have a timer, so every time you want to turn it on or off you have to do it manually. This makes it hard to conserve energy and lower the heating bills when you’re not at home.


How Does An Oil Filled Heater Work?

how do oil filled heaters workOil heaters are made out of metal columns inside which oil flows freely. A heating element usually situated at the base of the heater warms up the oil, so when it flows around the heater, it spreads warmth by convection. Each metal column is followed by a cavity. These cavities are very important because they offer a larger surface for the heat to radiate.

The oil is specially selected to have a high specific heat capacity and a high boiling point. Most oils selected have the boiling point at temperatures between 150 – 300 degrees Celsius (302 – 572 degrees F). These features determine the oil to act as a heat reservoir, allowing it to store a large amount of heat in a small amount of fluid while it stays liquid and does not transform into steam.

A common misconception people have is that the oil has to be changed periodically for the heater to work properly. This is not true because the oil is not consumed as fuel, but it acts as a heating reservoir. The volume of oil remains the same even after years of continuous use. It keeps flowing through the metal columns whenever you use the heater.

Electricity is used by a resistor to warm up the heating element at the base of the heater. The heat generated by the heating element is transferred to the oil, which in turn transfers it to the metal wall through convection, and from one wall to another through conduction. The heat is transferred to the surrounding air through convection and radiation.

The columns are usually designed as thin metal fins, so their area is large relative to the amount of oil in them. This large surface allows more air to come in contact with the heater, increasing the amount of heat transferred from the heater to the air.

Top oil filled heaters work silently because they don’t use fans to push the warm air around the room, they allow physics to do the job for them. Once the air is heated, it becomes less dense and rises, pushing the colder air down towards the heater. The cold air is heated and rises, pushing colder air back down repeating the cycle. This goes on for as long as the heater stays warm, creating an even temperature around the room.

Oil Filled Heater Efficiency

Oil filled heaters represent a safe, quiet way to heat your house. They are some of the most efficient electric heaters available on the market. You can use them as the main heating source, or as a secondary source to lower your heating bills with great results.

You might be wondering – ‘What makes oil filled heaters so efficient?’. In the following section, we’re going to explain how to use oil filled electric radiators efficiently, and how to lower your heating bills while using them.

Unlike the convection heaters, which heat the room by transferring heat directly to the air, or radiant heaters, which warm people or objects, an oil filled heater use the hot oil inside them to gradually spread warmth around your house.

The best oil filled space heaters will produce enough heat to raise the temperature of a room with a surface of 350 square feet, maybe even larger if the room is well-insulated and has little to no leaks.

Using the natural air flow around the room, an oil filled radiator will gradually raise the temperature until it reaches an even, stable value. Because the radiators don’t use fans to push the warm air around a room, all the electricity they consume is used to heat the oil, which in turn heats the metal columns that radiate warmth to the air around them. This means that almost 100% of the electricity they use is transformed into heat, making oil filled radiators very energy-efficient. Some electricity is used for operating the control panel, but oil filled heaters transform over 99% of the electricity into heat.

A big advantage of using oil filled radiators is that you can move them around the house and use them where you need them most. Central air heating’s major disadvantage is that you can’t control the temperature for every room individually, so the situation might arise when some rooms are very warm and comfortable, while the largest room in your house stays cold.

Using an oil filled radiator to provide warmth for that cold room is a great way of keeping your heating bills low, and maintaining a comfortable temperature throughout the house. Instead of turning the central heating up to heat that one cold room, making the other rooms too warm for comfort and increasing your heating bills in the process, you can just place a radiator in that room and leave it running for a while.

Oil Filled Radiator Running Costs

oil filled heaters efficiency

Running an oil filled radiator is very cheap. The main reason for this is the unique properties of the oil used. Diathermic oil has some remarkable thermal properties, so most manufacturers use it for their products.

Its high specific heat capacity allows it to absorb a high amount of energy before its temperature rises even with one degree. This means that the oil is capable of retaining a high amount of heat for every degree it gains. Combining this feature with the high boiling point of the oil, which is somewhere between 302 – 572 degrees F, allows the oil to absorb a vast amount of heat, making it a heat reservoir.

Because the oil acts as a heating reservoir, it will continue to radiate heat for a long time after the electrical resistor has finished working. This means that once oil is hot and the room reaches a warm temperature, the resistor will stop working, consuming less electricity. Every unit has a built-in thermostat which turns the resistor on from time to time to keep the oil hot, but because the resistor consumes more than 99% of the total electricity consumed by a radiator, having it working for short periods of time means lower heating bills.

It’s difficult to calculate exactly how much the running costs of an oil filled radiator can be because the costs are influenced by many factors, like how many hours it runs every day, the power output, and the cost of electricity in your area.

Here is a list of the estimated running costs of oil filled radiators:

  • A unit with a power output of 450 Watts will be somewhere between $20 – $25 a year.
  • A 500 Watt unit will cost you somewhere between $24 – $32 a year.
  • The running costs of a unit producing 750 Watts will cost $35 – $45 per year.
  • An oil-filled radiator with a power output of 1,000 Watts will have an estimated running cost of $47 – $57 each year.
  • Units producing 1,500 Watts have a running cost of $70 – $80 a year,
  • Radiators producing 2,000 W will cost between $93 – $105 to run every year,
  • While the most powerful models, those producing 2,500 W and 3,000 W will have running costs starting from $116 and $140, respectively.

Each of the costs above was estimated for a unit running 4 hours/day, 90 days/ year, using the data provided by their manufacturers.

How to Choose the Best Oil Filled Heater – Buying Guide


Choosing the best oil filled radiator can be difficult in today’s market, and you have to take some factors into consideration before you make a decision. Read this quick buying guide to find out which are the features you should look for in an oil filled heater.

  • Portability

    oil filled heater buying guideThis is an important feature, as you can move a highly portable radiator from one room to another without too much trouble. Oil filled space heaters are usually larger and heavier than other heating systems, so portability should be one of the first things you should look for. A unit can have a high heating capacity, but if you can’t move it around the house easily, you won’t use it as often and where you would like.

  • Timer

    A timer will help you save money because you can use it to turn the unit off after you go to sleep, or set it to turn off right after you leave for work.

    Best rated oil filled heaters even use timers you can set to turn the unit on, increasing the amount of money you will save. This is a great feature to have because it allows you to program the unit to work before you get home from work, finding a comfortable temperature without having the unit run all day.

  • Size

    When it comes to oil filled radiators, size does matter. The larger the radiator, the larger the radiant surface. All oil filled heaters produce heat in the same way, by warming up the oil and circulating it through the metal columns. However, the number of metal columns and their overall surface determine how well the heat is transferred further, to the surrounding air.

  • Design

    The design of an oil filled space heater is important because different designs usually mean different ways of distributing the heat. You should find the right design for your particular needs.

    Certain models use vertical metal columns to propel the warm air from their top, rather than all over their surface, making them cooler to the touch. This is a good way to make the heater safer to be around, but it also makes the unit less effective at spreading the warm air to the air next to it.

    Other models don’t use metal fins, but thermal tunnels to distribute the warm air. This is a newer technology, and it should distribute the hot air over a wider area than regular radiators. Even though this might be true and the air could travel further into the room, it will probably take longer to warm a room evenly. When air gets hot, its density decreases, making it lighter and lifting it over the cold air. But when the hot air is distributed over a wider surface, it loses some of its warmth, taking longer to rise. This will, in turn, bring the cold air slower at the same level with the heater, taking longer to heat the room.

  • Safety Features

    All electrical appliances are fire hazards, but heaters have a higher risk of becoming a hazard than other household items. This is why most manufacturers offer additional safety features. Here are some of the best safety features you should look for.

    Rounded Edges – Radiators rely on their metal fins to increase their surface and transfer the heat to the air around them, but metal fins can have sharp edges. This edges might represent a danger to children, the elderly, or the pets in your household.

    Having rounded edges will lower the chances of an accident happening.

    Overheating Safety – This safety feature cuts the unit’s power when it gets too hot. This is one of the most important safety features there are because it minimizes the chances of a heater becoming a fire hazard.

    Over-tipping Safety – Oil filled space heaters are usually stable, and this stability can be improved by their wheels or casters. It is safer, however, to have this safety that cuts the unit’s power when it is not standing straight. This will lower the unit’s chance of becoming a fire hazard once it falls.

    Oil filled space heaters are considered safe, but if there are small children or small pets in your household, they might not be the best heating option for you. Even though some models might not get hot on the surface when they’re working, all of them will get extremely hot on the bottom, where the resistor is positioned. Even with thick protection over it, if the resistor’s casing is touched it will lead to serious injury.

Top 5 Oil Filled Space Heater Safety Tips

Every electrical appliance, especially electrical space heaters, has some safety risks, so you need to use them right. Read the following tips to learn how to use an oil filled space heater safely.

  1. No Extension Cords – It’s very dangerous to plug an oil filled heater into an extension cord, so make sure you only plug it into a wall socket. If this is not an option, you need to buy a heavy-duty extension cord, at least 14-gauge or thicker. Even if you use an extension cord this thick, make sure you use the shortest one possible.
  2. Keep The Fins Clear – The metal fins can get pretty hot when the oil filled radiator is working, so avoid leaving things on them. Besides the fact that it can represent a fire hazard, leaving different things on the fins and blocking them will lower the radiator’s efficiency, because it will decrease the area from which the heat can radiate.
  3. Keep The Children Away From The Heater – The heater can become hot when it’s working, so it might be better to prevent children or pets from reaching it. The metal fins are usually thin and may have sharp edges, making them slightly dangerous around children.
  4. Place The Heater Away From High Traffic Areas – The heater’s power cord can represent a tripping hazard, and the radiator’s metal fins are sharp enough to cause serious damage if someone trips over them. Make sure you place the heater away from the most circulated areas in the room and keep them away from doors.
  5. Turn The Heater Off When You Leave The Room – Using an oil filled space heater is pretty safe, but it’s safer to turn the unit off when you’re leaving the room, especially if the heater does not use a thermostat, and runs continuously.

6 Benefits of Oil Filled Heaters

Save Money – You can save money by using an oil filled heater, especially when the temperatures are not so low. Instead of turning on the central heating system and heating the entire house, just use an oil filled heater, use it to warm up a room, and then take it with you when you change rooms.

  1. benefits of oil filled heatersAnother way to save money is to keep the central heating’s thermostat at values lower than what you’d usually set, and use an oil filled radiator in the rooms you actually use. If you lower your thermostat with up to 10 degrees F and use a space heater where you have to, you can lower your heating bills by up to 27%.
  2. Efficient – Oil filled space heaters are efficient. They might take a longer time to warm up than other space heaters, but once they’re hot their resistor, which is the main consumer of electricity, works sparingly, keeping the total cost of using a unit low.
  3. Long Lasting Heat – Unlike common convective space heaters, oil filled heaters take longer to heat up, but they will radiate heat for a long time after the resistor stops working. They represent a great way of keeping a room’s temperature constant throughout the day.
  4. Safe – Oil filled space heaters are safer to use than other types of space heaters available on the market. The working elements of the heater are unreachable, and they represent a fire hazard only in the case of a malfunction. Most manufacturers offer additional safety features like an overheat protection or thermostatic controls, so you won’t have to worry about safety when using one.
  5. Even Temperature Around The Room – Unlike regular electric heaters which heat the air straight in front of them, oil filled radiators use convection air currents to distribute the warm air evenly around the room. When the air next to the heater is warmed up, it’s density drops, so it becomes lighter and it rises. This allows the colder air above to come under it and get warmed by the heater. This process is repeated indefinitely, so eventually, all the air in the room passes next to the heater and gets warmed up, reaching an even temperature.
  6. Portable – Oil filled space heaters use casters to improve their portability. You’ll be able to roll them around the house, without having to lift them. You can place the heater where it’s necessary, and you can move it around the house when you change rooms.

Oil Filled vs Ceramic Heaters – Which to Choose

Oil filled heaters are a great way to heat your house, but how do they compare with the competition? Here is a comparison between oil filled radiators and ceramic heaters.

Ceramic heaters quickly warm up a room. This happens because they use electricity for heating up their working elements, and then the heat is transferred to the air surrounding them. As soon as you turn a ceramic heater on, you’ll be able to feel its warmth. The downside it that as soon as you turn the unit off, the heating elements get cold, stopping the heat from spreading.

Oil filled heaters take a longer time to warm up because the electricity is first used to heat up the oil, which in turn heats up the metal fins of the radiator. This process is longer, but the oil’s thermal proprieties makes it use the energy it stored for a long time. Once the oil is hot, it will radiate the heat even if the unit is turned off and it’s not consuming electricity.

Ceramic heaters usually stay cool to the touch, but some of them can get warm. They don’t get hot to the touch, and you can move them around right after using them. Oil filled heaters, on the other hand, get hot to the touch and they take a long time to cool, so you have to wait for a while if you plan to move the unit around the house.

Ceramic heaters are smaller and lighter than oil filled heaters. A large ceramic heater will usually be lighter than a small radiator heater because it’s not filled with liquid and it doesn’t need fins to spread the warmth around the room.

Once the oil is hot inside of it, an oil filled heater will only turn the resistor on once in a while to keep the oil at high temperatures, consuming a small amount of electricity. A ceramic heater has to use electricity at all times when the heating elements are working.


We’re sure that after reading our buying guide you have all the information you need to make the right decision about which oil filled radiator you should buy.

Oil filled heaters are an old solution to an even older problem, raising a room’s temperature at comfortable values. People used it for decades, and they still use it because it’s an effective, relatively low-cost way of heating.

We presented the best-selling models in our oil filled heater reviews, but if you didn’t find the right model for your needs among them, keep in mind that there are less popular ones that might fit your plans.

Maybe even the best oil filled heater won’t fit your needs as good as you’d like, but that’s all right. We prepared other buying guides and reviews for you, so all you need to do is check out the other articles on our website. We’re sure you’ll find the right heating unit eventually.

One Response

Leave a Reply

Your email address will not be published. Required fields are marked *