Top 7 Best Space Heater For Large Room 2020 – Detailed & Unbiased Reviews

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Whenever fall and winter come around, you may start to find that your central heating is just not quite sufficient for your home heating needs anymore. This is especially so for any larger rooms that you may have where chilly spots start to develop.

Instead of layering on the clothes and ending up with tons of  laundry, how about investing in a space heater? It can be the perfect addition to crank up the temperature at any chilly spots in a large room. 

However, for a space heater to heat up a large room effectively, you will need to find one that has sufficient power output as well as the correct mode of heating. To help you with your decision, we’ve already done the homework on just that.

Below you will find a list of six top rated space heaters for large rooms from reputable international brands with their pros and cons clearly listed.

HeaterHeating TypeSafety rating Power
Dr InfraredInfrared +Fan4/51500WQuiet (39dB)Moderate
KING PAWFan-forced4.25/52250W Moderate (53 dB)Poor (Wall mounted)
De’Longhi MicaThermicMicathermic3.5/5 1500WSilent (almost 0 dB)Good
LaskoFan forced4/51500WQuiet (45 dB)Good
OPOLAR Ceramic HeaterFan Forced4/51500WModerate (50 dB)Great
Bovado Fan forced4.25/51500WQuiet (40 dB)Good
DeLonghi OilOil Filled4.25/51500WSilent (almost 0 dB)Moderate
Comparison of space heater for large rooms

You’ll also find a buyers’ guide where you can read our rationale when deciding how to rate these products, and hopefully you can use it yourself when making future purchases.

In a Hurry? This Is Our Winner!

Dr Infrared Portable Space Heater, 1500 Watt

Best Overall Space Heater For Large Room

The Dr Infrared Portable Space Heater measures 13 x 12.5 x 17” and weighs 19 lbs. It runs on 1500 watt power and comes with a 3 years warranty. It also features a dual heating system of infrared radiation and convection, making it a natural choice for heating in large rooms. With tip-over and overheat protection, this heater also delivers on the safety aspect. It also has an in-built thermostat that allows for temperature ranging from 50 to 86 deg celsius.

What we love about Dr Infrared is the awesome humidifier that comes inbuilt into the heater. This prevents our poor skin from drying out during the harsh and dry winter season. Their heat output is also top range and has been shown to be 60% more powerful than other similar models of similar wattage. Dr Infrared’s advanced heating system enables greater heat production without using any more power with a high-efficiency blower.

Our verdict, this is a great choice with awesome functions that makes it a great heater in a living room, dining room or any large room in general.


  • Contains in-built humidifier to prevent drying of skin during winter
  • Blower is whisper quiet at 39 decibels
  • Easy portability with wheels
  • High and Low setting allows for better energy efficiency. More savings!
  • Great safety features with tip over and overheat protection
  • Fast at heating up 
  • Can create up to 60% more heat than other models on the market


  • Front grate do get pretty hot to touch as the heated air circulates through there
  • Remote can only be used once you manually turn on the heater

What their fans love: “I love this little heater. Cranks out the heat. Quiet and easy to use. Looks good and operation costs are hardly a blip on my electricity bill”

Best Heater for Large room Buyers’ Guide

Type Of Space Heaters 

To choose the best large room heater, you will first need some basic knowledge on the type of heaters available. Space heaters can generate heat via 3 methods; convection, radiation and combination. 

Convection heater works by heating up the air around it via a heating element. The hot air rises and creates a vacuum for cool air to be sucked in and warmed by the heating element. This continued flow creates a circulation of warm air that helps to heat up the room. As such, convection heaters work best in closed spaces. It is worth noting that all convection heaters come with an in-built thermostat for regulation of ambient temperature.

The advantage of a convection heater is that they excel at heating up an entire room for an extended period of time.The main drawback is that it works slower than a radiant heater as air is a poor conductor of heat.

Radiant heaters work by infrared radiation which travels out in waves to heat up the object in front of it. If you have ever sat in front of a campfire, you have experienced radiant heat. Because radiant heat does not require any medium, it can heat up the object in front of it very rapidly.

In contrast to convection heaters, they are poor at heating up large spaces as their beams tend to be more concentrated but they are excellent in spaces where people remain still (like the bedroom).

Therefore, for a large room, a convection or a combination heater is your best bet.

How To Choose The Best Heater For Your Room

Choosing a heater does not need to be difficult. You just need to know your personal needs well and consider these following points.

The Size Of Your Room

The most important criteria to look at here is the power of the heater. As a general rule of thumb, the ratio to consider is 10 Watts to 1 square foot of space. In theory, a 1500 Watts heater will be sufficient to heat up a room size of about 150 sq feet. When choosing your heater, do have a rough estimate of the room size you are heating up.


Space heaters are usually designed to be used indoors and can potentially be a safety hazard to curious toddlers and wandering pets. Models with safety features like cool touch exteriors and auto switch-off are always a good bet


Space heaters are meant to be supplementary to your central heating. Having good portability would mean that you have more flexibility when choosing when rooms to heat in your home. However, if you have space constraints, then a wall mounted heater will be perfect for you.

What The Manufacturers Don’t Tell You

If you had stopped at the previous paragraph and went on to purchase your heater, you might be disappointed because the heater did not work as advertised. That is because there are still a few key considerations to note which most manufacturers conveniently leave out! 

The Height Of Your Ceiling

When we spoke about the power-space ratio in the previous section, it was with the assumption that you have a ceiling height of about 8 feet. Therefore, for anything above 8 feet, the rule of 10 watt to 1 square foot does not apply. You would need to increase the wattage of your space heater an extra 25 percent for every 2 feet of extra ceiling space.

Room Insulation

If your room is poorly insulated or has a faulty window that lets in cold air, you will also need to factor in for greater wattage. Typically, an increase of 20% wattage would be a good place to start depending on how poor the insulation is. Alternatively, you can consider a second space heater in the same room.

Outside Temperature

The same heater would not deliver the same results if you were to test it in Florida and North Dakota. The outside temperature plays a huge role in determining the effectiveness of your space heater. It goes without saying that the colder it is outside, the harder it is for the heater to heat up your room. If you live in a cold place, increase the wattage ratio from 10 watts per square foot to 15 watts per square foot when considering space heating.

how to size space heater infographics

If math is not your strength, go on ahead and use our heater sizing calculator to help you size your space heater!

Best Heater for Large room Product review

KING PAW2422-U 2250-Watt 240-Volt Pic-A-Watt Wall Heater

Best Space Heater For Extra-Large Room

The King PAW2422 2250-Watt 240-Volt Pic-A-Watt Wall Heater measures 13.5 x 7.5 x 4” and weighs 9 lbs. It runs on a 2250 watt, 240 Volt power and has a 5 years warranty. It will require a recess in your wall to install this heater so please be prepared for a little bit more DIY when getting this heater. The design of this heater is similar to that of a regular wall vent so it will blend in well with any room decor. This heater is fan-forced and may generate some noise.

What we love about this heater is the multiple wattage settings that you can adjust to. This is also where their name “Pic-A-Watt” comes from. Being able to adjust the wattage gives the user much flexibility when installing this heater in different sized rooms. Because it has such a high wattage, it can also serve as a great heater in a large living room. It also comes with a patented Smart Limit Protection which disconnects elements and motor in the event normal operating temperatures are exceeded.


  • Comes with a 5 Years Warranty
  • Multiple wattage settings for different room sizes
  • Smart Limit Protection for additional safety
  • Easy installation
  • Quiet fan


  • Thermostat have to purchased separately

What their fans love: “They are energy efficient, quiet, and attractive. A real value for the money. They last years.”

De’Longhi MicaThermic Panel Heater 1500 Watt

Best Quiet Space Heater For Large Room

The De’Longhi MicaThermic Panel Heater measures 27 x 10 x 22” and weighs 15 lbs. It runs on  1500W power and has a 1 year warranty. As the name suggests, it uses micathermic heating which is a combination of radiation and convection methods to deliver heat. Micathermic heating is extremely efficient. It can heat up a specific zone almost immediately much like an infrared heater but it can also heat up the whole room because of its convective effect. 

When used in a hot yoga room, you can enjoy the immediate warmth from this heater easily. If you are getting friends over to practice with you, this heater can also do a great job of heating up the whole room.

It is designed as a surface wall mounted heater but you can also attach legs to it to make it a portable heater.
What we love about this heater is that it is virtually silent as there is no fan attached to it at all. It also has an adjustable thermostat and multiple heat settings that allow you to customize this heater to your heating needs.

Although the surface of the heater looks like it may be very hot to touch, there is actually a safe grate on the surface of the heater which is safe for touch. It may get slightly warm but definitely would not burn you. One aspect that we wished could be improved is the somewhat flimsy caster wheels that makes it easy to tip over.


  • Silent operation as there is no fan
  • Can be mounted or portable
  • Inbuilt thermostat has multiple settings to customize heating needs
  • Looks sleek and neat
  • Great safety features with tip over and overheat protection


  • Has a tendency to overheat 
  • Caster wheels are somewhat flimsy and needs to be treated with care 
  • Only 1 year warranty

What their fans love: “Last night the temperature dropped to 39 degrees, I had the unit turned on low and this morning it was still 68 degrees in my house. Which is just a perfect temperature for me. I highly recommend the purchase of this unit!

Lasko 755320 Ceramic Space Heater

Best Ceramic Space Heater For Large Room

The Lasko 755320 Ceramic Space Heater measures 7.25 x 8.5 x 23” and weighs 8 lbs. It is designed as a tower shaped heater giving you greater flexibility in a home with space constraints. It runs on 1500 watt power and comes with a 3 years warranty. It also features a digital thermostat with a wide display to allow you to effect changes easily. 

As a tower shaped heater, it allows you to save precious flooring space in your home and still get the heating that you need. Like most tower fans, there is an oscillation feature that allows the warm air to be circulated more evenly and more widespread in your room. What we particularly enjoy was actually the multi-function remote control that allows you to adjust your heating needs from the comfort of your couch. Sometimes it is these little things that matter and we love it.


  • Comes with oscillation which ensure even heating throughout the room
  • Silent operation
  • Cool-touch exterior prevent accidental injury to children and pets
  • Has overheat and tip over protection
  • Comes fully assembled and can be used within minutes 
  • Space efficient due to the tower design


  • Inaccurate thermostat resulting in overheating/underheating 
  • Inaccurate turn off timer

What their fans love: “I don’t want to heat the whole house I just want to heat the room I’m in and this does a perfect job! I absolutely love it and I highly recommend it.”

OPOLAR Ceramic Space Heater

Best Portable Space Heater For Large Room

The OPOLAR ceramic space heater measures 7.1 x 5.9 x 11.1” and weighs 3.5 lbs. It runs on 1500 Watt power and comes with a 1 year warranty. This is a compact heater that is extremely portable and can be transferred between rooms easily as per your needs. The power setting can be adjusted between 1500 watt (high heat) or 1000 watt (low heat) to cater to your different heating needs. It also has a fan-only mode which makes it useful even during the hotter months of the year. 

What we appreciate about this compact heater is the quiet operation of the fan. Even at the high setting, the fan only registers noise levels of about 50 dB. This would be a good addition to your study room or bedroom. Another feature that pet owners would like is that this heater has a broad and steady base. The low center of gravity makes it very difficult to tip over by your curious fur buddies. 


  • Quiet fan operation
  • Broad steady base makes it pet friendly
  • Has a fan-only mode 
  • Lightweight and compact
  • Has grab handles for easy transportation
  • Tip-over and overheat protection


  • Suitable mainly for smaller rooms only
  • Only has a 1 year warranty
  • Does not work well on carpeted floor as the safety switch cannot be depressed properly on soft ground

What their fans love: “I absolutely love it. I wouldn’t last this winter without this. Automatic temperature adjustment system saved me from all the hassle I have to deal with to turn the heater off and on.”

Bovado USA Oscillating Space Heater

Best Energy Efficient Space Heater For Large Room

The Bovado USA Oscillating Space Heater measures 25.15 x 9.55 x 8.9” and weighs 7 lbs. It runs on 1500 watt, 110 volt power. The mode of heating is mainly convection with forced-fan circulation. It also comes with oscillation features that allows the heated air to circulate throughout the room resulting in an even distribution of heat.

In terms of energy efficiency. It possesses numerous features that we really like. There is an ECO mode where the heater will adjust the power automatically to maintain the room temperature at a comfortable level. It has a digital programmable thermostat which allows the homeowner to adjust the heat output accordingly so that they don’t waste energy overheating the room.

This heater uses ceramic heating as its main source of heating which is extremely energy efficient due to the ease of heating up the ceramic heating element. It also has a programmable timer to facilitate auto shut off to reduce heating costs.

In terms of convenience, the Bovado heater is lightweight and extremely portable around the house. A single person will be able to transfer the heater with ease between rooms. The tower design also does not take up much real estate on the floor, allowing you more living space. When the heater is not needed during the warmer seasons, it can be slotted neatly into a corner in your storage as well.

For safety, the stay cool housing helps prevent burns In cases of direct skin contact and the digital thermostat prevents overheating. This makes it great for homes with children and pets who may accidentally come into contact with the heater. Additionally, it comes with a built in cutoff switch in the event the unit is accidentally tipped over.


  • Comes with oscillation which ensure even heating throughout the room
  • Cool-touch exterior prevent accidental injury to children and pets
  • Has overheating and tip-over protection
  • Has an energy efficient ECO mode to adjust heating to lower cost
  • Programmable timer for auto shutoff
  • Programmable thermostat for greater temperature control
  • Lightweight and portable


  • Fan can get noisy and may not be suitable for bedrooms

What their fans love: “I can’t recommend this heater enough. The price point is right for the quality and features. It works. It heats a large space FAST. It’s safe to use. It doesn’t guzzle electricity AT ALL, and I can set it and let it do its job with ease and without worry.”

DeLonghi Oil-Filled Radiator Space Heater

Best Oil Filled Space Heater For Large Room

The DeLonghi Oil-Filled Radiator Space Heater measures 27.7 x 18.6 x 7.2” and weighs 27 lbs. There is a 3 year warranty associated with this heater. It operates via convection heating and comes in 3 different heating power; 700W, 800W and 1500W. This provides the user with some flexibility in different weather conditions. This heater does run on oil but the oil is permanently sealed and you never have to change it.

Similar to the other DeLonghi heater on our review, the oil-filled radiator space heater is also great when it comes to it’s quiet operation. This would be perfect for your bedroom or study room.

As with most oil filled radiator, the mechanism of action is such that it will take some time before it will warm up your room. Therefore, do take that into consideration when buying this heater. If instant heat is your priority then you would be better off with an infrared heater. However, this heater makes up for its slow heating with superior safety features as the surface will generally always be cooler than that of an infrared heater. With that, this is also one of the safest space heater in this review.


  • 3 power settings for great flexibility
  • Contains overheat protection safety feature
  • Good portability with attached wheels
  • No assembly required. Just unpack and use
  • Makes little to no sound


  • Potential of oil leakage
  • May have an oily smell when using it initially
  • Is quite bulky in terms of size

What their fans love: “This is a well designed, well made product. As with all oil-filled heaters, it takes awhile to heat up, but once it does it silently radiates warmth. We use it in the evenings in a large high ceilinged room, and it makes the room comfortable.

Frequently asked questions (FAQs)

Q: What type of space heater is best for large rooms?

A: It depends on your needs.

  • Fan forced convection heaters and micathermic heaters are great for heating up large rooms evenly in a moderate amount of time.
  • Oil filled space heaters are great for heating up large rooms but takes a longer time. However, they stay warm for a long time even after they are switched off
  • Infrared radiant heaters can be great for heating large rooms if it comes attached with a fan. If not, it is not suitable for large rooms as they are better for zonal heating.

Q: How do I heat my room without a heater?

A: There are many ways. Most involves eliminating the source of the reduced temperature. These include;

  • Close up any gaps in you windows with weathering stripping and caulking
  • Reverse the direction of your ceiling fans
  • Invest in good blankets
  • Use a door sweep or draft stopper for your door

Q: How do I reduce heating costs at home?

A: Some minor home alterations you can make are;

  • Use programmable thermostats
  • Buy space heaters to spot-heat zones that are in use
  • Use a humidifier
  • Improve / fit extra curtains
  • Install plastic window treatments
  • Install Radiators boosters

If you would like to save more money on heating costs, be sure to read our comprehensive guide on how to reduce heating costs at home.

Q: How big of a room can a space heater heat?

A: This depends on the wattage of your heater. A very basic rule of thumb to follow is 10 watt for every square foot in your home. For example, a 150 sq. ft. room would require a 1500W heater. However, there are many other factors to consider like room insulation, ceiling height etc.

Be sure to read our guide on how to find out the size of space heater required so you do not get a heater that is the wrong size for your room. It includes a space heater sizing calculator to simplify any complex heating conditions.

Q: How much does it cost to run a 1500 watt heater for 24 hours?

A: You will need to know how much your local electric company is charging you per kilowatt hour. Assuming they charge you $0.20 per kilowatt hour.

It will cost 0.20 X 1500/1000 X 24 = $7.20 to run a 1500 watt heater for 24 hours.

Recap Of the best heater for large rooms

HeaterHeating TypeSafety rating Power
Dr InfraredInfrared +Fan4/51500WQuiet (39dB)Moderate
KING PAWFan-forced4.25/52250W Moderate (53 dB)Poor (Wall mounted)
De’Longhi MicaThermicMicathermic3.5/5 1500WSilent (almost 0 dB)Good
LaskoFan forced4/51500WQuiet (45 dB)Good
OPOLAR Ceramic HeaterFan Forced4/51500WModerate (50 dB)Great
Bovado Fan forced4.25/51500WQuiet (40 dB)Good
DeLonghi OilOil Filled4.25/51500WSilent (almost 0 dB)Moderate
Comparison of space heater for large rooms

Wrapping it up

Of the 5 products we reviewed, Dr Infrared Portable Space Heater was our favorite best heater for large rooms. It ticks all the boxes for safety, portability, quiet operation, energy efficiency and great heat output. What we especially love was the inbuilt humidifier that prevents those dry cracking skin during winter time.

The heating output of Dr Infrared also clearly trumps that of other similar heaters on the market. Although there is a concern of the grate being hot to touch, we can circumvent that by keeping it in an area out of bounds to wandering children and pets. Overall, a big thumbs up from us!

Click here to get one now!

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