Welcome to one of the most detailed best low-wattage space heaters reviews you will find anywhere. We want to provide you with all of the most important information that you need to make the right decision when purchasing a low-wattage space heater. You will find the 12 best energy-efficient space heaters reviewed here.
We will reveal our best low-wattage heater in this review and explain why we chose it to be number one. You will also see detailed reviews on other low-wattage space heaters so it is easy for you to choose the model that meets your needs. There is a pros and cons section for each heater reviewed to help you make your final decision.
Table of Contents
Best low-wattage heaters Reviews from Amazon: Upd 2023
What is Watt Density?
When you are looking for an efficient space heater you need to think about the life of the heating element. One of the best ways to assess this is to check the watt density. In technical terms, the watt density is the heat flux produced by every square inch of the element heating area.
You will see watt density presented in watts per square inch related to the heating element surface area. This will tell you the operating temperature of the heater in certain conditions. There is a fairly straightforward equation for calculating watt density:
Watt Density = The element wattage/[heated length in inches x the diameter of the element x 3.14]
Don’t worry if this doesn’t make a lot of sense to you. The important thing for you to understand is the difference between low-watt density and high-watt density in a heater. Heaters with a low watt density will have a long heater element life. They will also be more expensive.
A heater with high watt density will be cheaper and the element will not last as long. There is also the danger of a high-watt density heater failing by burning out. This can cause all kinds of damage and be a potential fire hazard.
We would always recommend that you choose a heater with the lowest watt density. Yes, it will cost you more to purchase a heater of this kind, but it will last longer and be potentially safer than a high-watt-density model.
What is Low Wattage Space Heaters?
Many people use space heaters to provide some much-needed heat quickly to a room. The more conventional space heaters will usually have a power output of around 1.5 kW to 2.5 kW. Low-wattage space heaters have a much smaller power output and can start from 50 watts and go up to 750 watts.
One of the most obvious advantages of low-wattage space heaters is that they consume a lot less electricity than the more traditional space heaters. If you want to heat up a small area or use the space heater for yourself then a low-wattage space heater is a very good choice. It will warm you up fast without you having to face a very large electric bill.
The other good thing about low-wattage space heaters is they are a lot smaller than other space heaters. This makes them ideal for providing heat in small spaces. They are lightweight and you can move them around easily. So if you are looking for a portable heater then a low-wattage space heater is an excellent choice.
Although there are 50-watt low-wattage space heaters on the market we suggest that you look for something more powerful. A 50-watt heater is not going to provide you with a lot of heat no matter how small the space is.
Most of the 50-watt low-wattage space heaters that we came across were cheap imports from China and we don’t recommend them. You will get a much better result if you go for a low-wattage space heater that has more power. We suggest that you look at energy-efficient space heaters that have at least 200 watts of power output.
How do Low Wattage Space Heaters Work?
Most low-wattage space heaters use electricity as their power source. Some use electric coils in the heater element and others are filled with oil. When you switch on an electric coil low-wattage space heater the electric current will make the heating coils produce heat.
Some electric low-wattage space heaters have fans that help to circulate the warm air. First, it will draw the cold air into the heater where it passes over the heated coils and is then forced out in the form of warm air. This process is convection.
If your low-wattage space heater doesn’t have a fan then the air enters the heater at the lowest point and will flow over the heated coils and the warm air finds its way out of the top of the heater. You will see this type of heating called radiant heating.
With an oil-filled low-wattage space heater, there is a reservoir of oil that has heat applied to it by an electrical element. With a completely submerged electrical element, all of the surrounding oil heats up. Heat radiates from the space heater.
Is a Low Wattage Space Heater good for Home use?
The answer to this is a definite “Yes”. These days more and more people are looking for economical ways to provide additional heat in their homes and low wattage space heaters are the perfect solution.
Imagine that you are alone in a room in your home. You have central heating but you are working in one area of the room so it is not necessary to heat the entire room. Why not turn the central heating thermostat down and use an energy-efficient space heater to keep you warm in the spot where you are?
In some homes, there is not enough heat available from a central system and a low-wattage space heater can provide the additional heat that you need. What about your garage? Maybe you haven’t got central heating there and if you are working in your garage then a portable low-wattage space heater will keep you warm.
There are different types of low-wattage space heaters that you need to be aware of. They use different technology to provide the heat that you require. So we will take a look at the most common types of portable space heaters:
Ceramic Low Wattage Space Heaters
With this type of heater, there is a ceramic heating element inside. Most ceramic heaters have a self-regulating heat feature where they keep the temperature constant through the use of a positive temperature coefficient.
This means that you can program the desired temperature into your ceramic heater and when it reaches this temperature it will keep this constant for you. Not only will this keep your electric bill low but it will help to conserve the internal components so that they last longer and also reduce any safety risks.
Oil Filled Low Wattage Space Heater
An oil-filled portable space heater uses micathermic heating due to the diathermic oil inside the heater. An electrical heating element heats up a reservoir of oil and all of the oil in the heater passes over the element.
The heater fins are there to disperse the heated oil and produce radiant heat. Like other space heaters, with some oil-filled heaters, you can set the desired temperature and this remains constant for you saving you money.
Infrared Low Wattage Space Heaters
Infrared heaters work differently from other space heaters. They will project heat onto people or objects that are directly in their path. Some infrared heaters use quartz tubes. Inside the tubes are nichrome heating wires that provide the heat source.
You can also get infrared space heaters that use a tubular heating element. This is similar to what you find in a stove or oven. There is a solid metal heating element including a heating wire which will increase the temperature of the metal exterior surrounding it.
How to use Low Wattage Space Heaters
If you want to get the most out of your low-wattage space heater then you need to know how to use it properly. We will look at the most important controls for your heater here and explain the best way to use them.
Most low-wattage space heaters have a thermostat and this is a very useful control. Be careful to ensure that there is no obstruction to the thermostat sensor otherwise it will not work correctly. You can use the thermostat to set specific temperatures and test how well they work for you. Once you find the best temperature the thermostat will maintain this for you.
Using a low-wattage space heater to heat up specific zones in your home is always the most efficient way to use this. If you only use an area of a room at certain times, for example, a home office area, then there is no need to use central heating to continually heat this. Just take your portable space heater with you and heat up this specific zone.
Only heating an area of a room that you are currently occupying will help to reduce your heating bills. You can keep your central heating on a low setting while you focus on more intense heat when you are using your low-wattage space heater.
Best Low Wattage Space Heaters Reviews from Amazon: (Updated 2023)
There are many different low-wattage space heaters on the market today so we spent a great deal of time testing a lot of these on your behalf so that we could identify the best ones for you. This is different from other best low-wattage heater reviews in that we identified 12 heaters that were worthy of our list.
For each one of the 12 heaters in the list, you will find a detailed review where we will discuss the features and also the pros and cons of each model. This information is essential for you to make the final decision on which low-wattage space heater is best for you.
1.Costway Oil Filled Radiator Low Wattage Space Heater 700W Review:Editor choice
This is one of the most powerful low-wattage space heaters available and it has some excellent features. The unit is very energy efficient and will provide good heat output for a room in your home or your office when you need it. This heater is totally silent when operating.
The Costway Oil-Filled Radiator Heater 700W has an adjustable thermostat so that you can set the desired temperature and then let the heater provide the necessary heat. This oil-filled low-wattage space heater is completely sealed so there is no requirement for refilling. In our tests, this heater warmed up very quickly and achieved the set temperature fast.
One of the best features of this heater was the fact that it produces even heat. This means that wherever you are around the heater you will feel the warmth that it generates. The carrying handle made transporting this low-wattage space heater really easy. The stand is very firm and provides good support.
There are two great safety features with this oil-filled heater which are an automatic overheat protector which will switch off the unit if it detects any overheating. Then there is the tip-over protection feature which will cut the power if the heater tips over. This is essential for a unit of this design.
The Costway Oil Filled Radiator Heater 700W is fairly small measuring 12 inches by 14 inches by 5.5 inches and weighs only 8.6 pounds filled with oil. It plugs into a standard mains outlet and is one of the best low-wattage space heaters we have ever tested providing good heat and having good energy efficiency.
2. Amazon Basics 500 Watt Ceramic Small Space Heater Review
If you are looking for a powerful low wattage space heater that is small and relatively inexpensive then this could be a very good option for you. We were able to get a nice amount of heat from this heater and in no time at all, it made the space we wanted to heat warm and comfortable.
The Amazon Basics 500 Watt Ceramic Small Space Heater is ideal for use in any room in your home or office. The ceramic coils inside the heater provide fast heat as soon as you turn the device on. The internal fan is fairly quiet and does a good job distributing the warm air.
This is a very compact and lightweight low-wattage space heater that you can easily carry around to provide you with that extra heat wherever you are. It only weighs 1.43 pounds and the dimensions of the unit are just 5.9 inches by 6 inches by 3.2 inches.
We ran this space heater for a while and measured the energy consumption and were very impressed. We calculate that you could run this heater for 24 hours for less than a dollar. If you only need to heat up a small space then this is a very good choice.
The Amazon Basics 500 Watt Ceramic Small Space Heater has a tip-over safety feature that automatically cuts the power if the unit tips over. This is good but it would have been even better if there was an overheating protection feature as well.
3. Opolar 500 Watt Ceramic Mini Low Wattage Space Heater Review:
This is another small and compact low-wattage space heater that impressed us in our tests. The power output is good and will provide enough heat for most small spaces. It has a thermostat for heat control which is good for saving money on your electricity costs. The thermostat control was responsive and worked well.
The OPolar 500 Watt Ceramic Mini Heater really heats up fast due to the ceramic technology. It has a fan that does a good job with heat distribution and this is reasonably quiet. The case of the heater is flame-retardant and the heater meets the ETL safety standards which is excellent for a heater in this price range.
This really is a low-wattage space heater with great safety features. There is an overheating protection feature that shuts off the device if it gets too hot. If the heater is accidentally tipped over then another safety device disconnects the power immediately.
The Opolar 500 Watt Ceramic Mini Heater is a really small and lightweight heater. It measures 4.6 inches by 6 inches by 3.3 inches and weighs in at just under 2 pounds. This means that you can use it under a desk in your home or office.
4. Brightown 400 Watt Portable Mini Heater Ceramic Review
We were a little concerned about this low-wattage space heater as the power output is only 400 watts. But when we tested this heater we were pleasantly surprised at the amount of heat that it produces. The lower power also means that you will save money on electricity costs.
The Brightown 400 Watt Portable Mini Heater Ceramic uses ceramic heating technology which means that this little heater warms up very fast. The internal fan is effective in pushing the warm air around so that you really feel the benefit fast. It is a fairly quiet heater and it should not distract you very much.
This low-wattage space heater has some very good safety features. We liked the overheating protection feature which will shut off the device instantly should it reach a specific temperature that is too hot. It also has a shut-off mechanism for tips over but this was a little bit too sensitive in our tests. This heater is ETL listed.
The Brightown 400 Watt Portable Mini Heater Ceramic is one of the lightest low-wattage space heaters that we have tested weighing under 1.6 pounds. It is small in size too at 7.5 inches by 6.8 inches by 3.5 inches.
5. Lasko Model 100 MyHeat Personal Space Heater Review
Lasko is a name that has a very good reputation in the heating industry. So we were keen to put this low-wattage space heater to the test. The power output is only 200 watts but the heat generated is sufficient to keep an individual warm if they are in front of this heater. Reduced power consumption will help you to save on energy costs.
This is another ceramic heater with a fan for warm air distribution. It is not as quiet as some of the other small heaters. The Lasko Model 100 MyHeat Personal Space Heater is ideal for keeping a single individual warm. It doesn’t have the power to do more than that so don’t expect it to heat a room.
You cannot control the heat output of this low-wattage space heater as there is no thermostat or low and high heat setting. But with a maximum output of just 200 watts, it is not going to put much of a dent in your bank account as far as your electricity bill is concerned.
This low-wattage space heater is seriously light weighing only around one pound. It is one of the smallest heaters around measuring 3.8 inches by 4.3 inches by 6.1 inches. You can literally take the Lasko Model 100 MyHeat Personal Space Heater with you anywhere. All you need is a standard mains outlet to plug it into.
The housing of this heater is cool to the touch which is a good safety feature. It also has an overheating protection feature which will disconnect the power immediately if the unit becomes too hot. There was no tip-over protection though.
6. Kloudi Portable Electric Oscillating Personal Space Heater Review
This is one of the few low-wattage space heaters that we tested that had an adjustable temperature control (not a thermostat). The maximum setting delivers 950 watts, the second set provides a comfortable 450 watts and the third setting really just provides a breeze at 5 watts.
The Version Tech Small Space Heater Personal Portable is another ceramic heater that has a fast heat-up time. The manufacturer claims that the ceramic heating element used in this space heater will last a very long time. We were unable to confirm that in our tests.
We found this unit to be fairly quiet and the fan did a good job distributing the warm air. This low-wattage space heater has an automatic thermostat built in that provides extra temperature control. This heater is small measuring 4.9 inches by 4.9 inches by 8.1 inches. It weighs only 2.4 pounds and you can move it around easily.
The heater uses flame-retardant materials which are good for safety. There is also a tip-over automatic shut-off feature as well as an overheating protection feature which will turn the device off immediately if it gets too hot.
7. Opolar Mini Ceramic Heater With Adjustable Thermostat 500W Space heater Review
This is another good low-wattage space heater from Opolar. It is a fairly low-cost heater with some good features such as an adjustable thermostat that helps to keep your electricity costs low. It is a ceramic heater so the warm-up time is very fast.
The Opolar Mini Ceramic Heater With Adjustable Thermostat 500W provides some good heat and is ideal for personal space heating. We found it to be easy to use and the thermostat is sensitive and pretty accurate. It does not make a lot of noise as the fan distributes the warm air.
If you are looking for a small and lightweight low wattage space heater then at just 4.6 inches by 6 inches by 3.3 inches and a weight of only 1.8 pounds this is a very compact heating unit. It is great for providing supplemental heat in small spaces.
There are two good safety features with the Opolar Mini Ceramic Heater With Adjustable Thermostat 500W which are the tip-over protection that turns off the heater if it tips over and the overheating protection which will automatically switch off the heater if it gets too hot.
8. Honeywell UberHeat Ceramic Personal Space Heater Review
This low-wattage space heater has a 250 watts power output which means that it is very cost-effective to run. Despite the lower power output, we were pretty impressed with the amount of heat produced.
the Honeywell UberHeat Ceramic Personal Space Heater is a ceramic space heater so the warm-up is fast. There are two heat settings to choose from so that you can save even more on your electricity costs. The low setting delivers 170 watts and the high setting 250 watts.
This is truly a personal space heater. If you want to heat up a larger area then this is not the right choice. It has good safety features such as overheating and tip-over automatic protection and flame-resistant materials. This heater is fairly quiet to use.
The Honeywell UberHeat Ceramic Personal Space Heater is a very small heater measuring 5 inches by 4 inches by 7.8 inches. It is incredibly light as well weighing just over a pound so you can easily move it around anywhere you want.
9. AUZKIN Small Low wattage Oscillating Space Heater Review
This is a low-wattage space heater that delivers 600 watts of heating power very fast due to the ceramic heating technology used. In our tests, this heater warmed up in under 2 seconds which was particularly impressive.
The AUZKIN Small Low wattage Space Heater has an oscillating function for the distribution of heat. We found that the heater provided good heat and was pretty economical to use. It is a fairly small unit measuring 8.3 inches by 4.3 inches by 3.9 inches. The weight of this heater is just under 1.9 pounds.
There is an effective tip-over switch that is not too sensitive and will turn the heater off immediately if the heater tips over. This device also has to overheating protection and if it gets too hot then automatically cuts the power straight away.
10. Andily Space Electric Small Heater Review
This low-wattage space heater has an interesting style and is well-priced with some reasonable features. The ceramic heating technology provides warm air fast and the fan is fairly quiet and circulates the warm air pretty well.
The Andily Space Electric Small 500W Heater produces good heat and at 500 watts will not break the bank as far as electricity costs are concerned. We found the range of this heater to be good and better than some heaters that cost more.
There are two good safety features with this low-wattage space heater which are the overheating protection which will shut off the power immediately if things get too hot and the automatic tip-over protection which will again switch off the heater immediately if it tips over.
This heater is small and lightweight so you can move it around very easily. The dimensions of the Andily Space Electric Small 500W Heater are 7.1 inches by 5.3 inches by 5 inches. The unit only weighs 1.3 pounds.
11. Tao Tens Portable Space Heater 600W Review
This is a mid-range price low wattage space heater that has some good features. The power output is good and the heat is produced well for personal spaces. With the ceramic technology, this heater will warm up in around 2 seconds which we tested to be true.
The Tao Tens Portable Space Heater 600W is a 45° automatically oscillating heater and you can control this with the button at the top of the device. There are two heat setting modes which are the hot and natural wind modes. The hot mode delivers a maximum of 600 watts while the wind mode delivers 4 watts of power.
This heater has two usual safety features which are tip-over protection which switches off the heater automatically if it tips over and the overheating safety feature which will also switch off the device immediately if it becomes too hot.
It is very easy for you to carry the Tao Tens Portable Space Heater 600W around thanks to the convenient carrying handle and the small and lightweight design. This heater measures 4.6 inches by 4.6 inches by 8.3 inches and only weighs 2.1 pounds.
12. Optimus H-5511 Infrared Quartz Radiant Space Heater Review
We tested a few infrared-powered low-wattage space heaters and this is the only one that made it to our final list. There are two heat settings for this heater which are full power 800 watts or half power 400 watts. The heat output was good in both of these modes.
When we tested the Optimus H-5511 Infrared Quartz Radiant Heater we were pleasantly surprised with how quiet it was. The housing of the heater is cool to the touch and it has the standard safety features of tip-over automatic shut-off and overheating automatic shut-off.
This infrared low wattage space heater is larger than most of the others on our list measuring 12.5 inches by 12.2 inches by 6.2 inches. It weighs around 4 pounds which is still light enough to carry it around from one room to another.
The Best Brands for Low Wattage Space Heaters
There are a number of top brands that market low-wattage space heaters and some of these feature in our review. We would ask you to approach this with an open mind. Buying a well-known brand does not always mean that you will end up with the best value-for-money low wattage space heater.
Some of the most recognized space heater brands to feature in our final list of 12 are:
But there are some very good emerging brands on our list as well. These manufacturers provide efficient low wattage space heaters with good features including safety. This is far more important than having a recognizable brand name.
Safety Tips for Low-Wattage Space Heaters
Any type of heater is a potential fire hazard and there is also the risk of electrocution so you need to handle your low wattage space heater with care. So we have created a safety list for you to abide by to ensure that you will minimize any danger when using your heater:
- When you first receive your low wattage space heater be sure to read all of the instructions, including any safety warnings, so that you operate the heater in the safest way.
- If you have had your space heater for a while then check it thoroughly for a frayed electrical cable, a broken plug, or any type of loose electrical connection that could be a safety hazard.
- Do not leave your low wattage space heater unattended. If you need to leave the area for a while then switch the heater off.
- Keep children and pets away from your low wattage space heater.
- Never use a low-wattage space heater to cook food, thaw pipes, dry clothing you have washed, or heat bedding materials.
- Have a smoke alarm installed in every room of your home where you intend to use a space heater.
- Make sure that your low-wattage space heater is located in the right position. Keep it at least 3 feet away from any combustible materials such as rugs, clothing, and papers.
- Do not place a low-wattage space heater in an area where it is likely that someone will trip over the electrical power cord.
- Never use a power strip or extension cord with your low-wattage space heater. This can lead to overheating and the risk of fire. Plug the heater directly into the main outlet. Avoid plugging other appliances into the same outlet as your low-wattage space heater.
- Always position your low-wattage space heater on a flat surface. Do not place your heater on a carpet, on a table, a cabinet, or other pieces of furniture.
- When you are not using your low wattage space heater be sure to unplug it from the mains outlet and store it away properly.
How to Choose the Best Low Wattage Space Heater: Buying Guide
There are a number of things that you need to consider before purchasing your low-wattage space heater. We are going to cover these now in some detail so that you know exactly what to look for when making a purchase decision.
Decide on the Power Output you need
To get the most efficient use from a low wattage space heater you need to work out the right power output for the space you intend to heat. In order to do that you need to take some measurements and do some simple math.
The first step is to measure the width and length of the area you want to heat and then multiply these numbers together. Then you need to multiply the total by 10 to provide you with the wattage required to provide adequate heat. Here is an example:
The area measures 8 feet by 5 feet. When multiplying these together you get 40 square feet.
The output required is 40 x 10 which is 400 watts.
Now you need to find a low wattage space heater that matches your power output requirements as closely as possible. This is a simple calculation that does not take into account the height of the area but it is a good estimate nonetheless.
Is there a Thermostat with the Heater?
When your low wattage space heater has a thermostat it will be more efficient than other heaters that don’t have one. You will save energy and money with a thermostat because once the heater reaches the desired temperature it will stop producing more heat and only turn the heat back on when the temperature drops below what you need.
How Quietly does the Heater Operate?
Some space heaters make a lot more noise than others. This is especially true if they have an internal fan to distribute hot air. Some low-wattage space heaters are quieter than others so this is something that you will want to check.
Are there Different Heat Settings?
Some low-wattage space heaters have different heat settings and these tend to be more efficient than those that don’t have this feature. Sometimes there will be just a high and low heat setting and you will find space heaters that have more heat settings than this.
You need to control the heat output of your low wattage space heater as much as possible for your own comfort and to save money on electricity bills. Being able to step up or step down the heat output in small increments is a great feature to have.
The Size of your Heater
Low-wattage space heaters are usually small anyway but it is always a good idea to check the space you have available to locate your heater. You must place your heater in a safe position away from flammable materials. Calculate the space you have for your heater and then find one of the right sizes that will fit in the space.
What Safety Features Does the Heater have?
There is always a safety risk with any kind of heater. Even low-wattage space heaters are powerful and produce a lot of heat. You do not want to start a fire or run the risk of electrocution so look out for these safety features:
Automatic protection from “tip over”
– if your low wattage space heater tips over by accident then is there an automatic shut-off feature that turns the heater off straight away?
Protection against overheating
– if you run a low-wattage space heater for a while then it can get pretty hot especially at the maximum heat output. If there is any overheating then the heater will automatically switch off if it has this safety feature.
Frequently Asked Questions for Best Low Wattage Space Heaters: FAQ
Q1.Can I leave a space heater on all night?
In theory, you can leave your low wattage space heater on all night but it is not something we would recommend. If your heater has a timer then use this so that it switches off automatically after a while. It is dangerous to have a space heater running when you are asleep.
Q2.What type of space heater is the most energy-efficient?
There is no straightforward answer to this as it depends on your situation. Ceramic heaters are very efficient and so are infrared heaters. Oil-filled space heaters are very efficient too. The only issue with an infrared heater is that it uses a line of sight to heat things. So if you are not in the direct path you will not feel any heat.
Q3.What is the minimum wattage you would recommend?
All of the low-wattage space heaters in this review are 200 watts or more. We do not recommend anything below 200 watts because it will not have the power to provide the heat that you require. Especially avoid cheap 50-watt heaters.
Q4.How important is a thermostat control?
Anything that provides you with more control over the heat output is a good thing. A thermostat is better than high/low heat settings in our opinion.
Q5.How safe are low-wattage space heaters?
As with any mains-powered heater, there is always the risk of fire or electrocution. But modern low-wattage space heaters usually have good safety features built-in such as automatic shut off for overheating or if the unit tips over.
Q6.How important is the size of a low wattage space heater?
Not that important. Low-wattage space heaters are going to be smaller and more lightweight than conventional space heaters because they have a lower power output. So portability should not be an issue with any model.
It is our sincere hope that you found this to be one of the most detailed and informative best low wattage space heaters reviews that you have found. We have worked hard and spent a lot of time testing different heaters to bring you the pick of the best low-wattage heater reviews.
In this review, we introduced you to some of the lowest-wattage space heaters ranging from 200 watts up to 950 watts. With a power output of 700 watts, we firmly believe that the Costway Oil-Filled Radiator Heater is the very best low-wattage space heater available. It provides great heat, has excellent thermostat control, and will last for years.
If you are on a budget then the Amazon Basics 500 Watt Ceramic Small Space Heater and the Opolar 500 Watt Ceramic Mini Heater are good alternatives. The Amazon Basics model ranked high on our list because of its low price and what you get. For a little extra, the Opolar 500 Watt ceramic provides more features.
You need to think about how much you are prepared to spend on your low-wattage space heater and the power that you require. As with everything else in life you tend to get what you pay for with low wattage space heaters.
We wish you well in purchasing your low wattage space heater and we hope that you found this to be one of the most informative of the best low wattage space heaters reviews out there.