6 Most Efficient Space Heaters for Large Rooms of 2020

Last update: Nov 27, 2020

Using electric appliances around the house can cost you a lot of money if you don’t pay attention to the efficiency of each and every device. With that in mind, a space heater will be one of the most energy-consuming products unless you choose the most efficient space heater for large rooms. There are several variables to consider and we will help you make a smart, easy decision.

Here are the most efficient space heaters for large rooms you can buy in 2020:

  • Best Quality: Dyson (61874-01)
  • Best Radiant Heater: DeLonghi Oil-Filled Radiator Space Heater
  • Best Wall Mounted: Stiebel Eltron 074057
  • Best Panel Heater: De'Longhi Mica HMP1500
  • Quietest: Dr Infrared Heater Portable Space Heater
  • Best For Extra-Large Rooms: Lifesmart Lifelux 8
6 Most Efficient Space Heaters For Large Rooms
Best Quality
Dyson (61874-01)
    Best Radiant Heater
    DeLonghi Oil-Filled Radiator Space Heater
      Best Wall Mounted
      Stiebel Eltron 074057
        Best Panel Heater
        De'Longhi Mica HMP1500
          Quietest
          Dr Infrared Heater Portable Space Heater
            Best For Extra-Large Rooms
            Lifesmart Lifelux 8

              Best Quality: Dyson (61874-01)

              Dyson (61874-01)
              Dyson (61874-01)
              8.6Great
              Pros
              • A unique, interesting decorative item – futuristic design
              • Multifunctional and versatile for different purposes & all-year-round usage – two running modes & able to heat and cool a space
              • Smart and energy-efficient - Intelligent Thermostat
              • Extremely safe to use – auto-shutoff whenever tipping over, no heating elements exposed nor fast-spinning blades
              Cons
              • Not really quiet

              Dyson (61874-01) is currently the most well-loved space heater on the market.

              It stands out from the rest by the futuristic, sleek design that is definitely a nice decorative item in a house. The size is also compact and the weight can’t be lighter.

              What even impressed us more was its functionality, highlighting two running modes - the diffused and focused for different purposes. We love that it has a cooling function as well for all-year-round usage.

              The biggest selling point of this model is it features Intelligent Thermostat which tracks room temp precisely to adjust it to your desired heat with NO energy wasted.

              Parents or pet owners will also love to use this heater as its design is very safe, with no heating elements exposed nor fast-spinning blades at all.

              Additionally, it will automatically shut down if accidentally tipped over. Smart!

              Dyson (61874-01) Specifications

              Heat Settings

              33 to 99 degree

              Heating Area

              450~500 Square feet

              Timer

              Yes

              Dimensions

              8.03 x 6.02 x 23.4 inches

              Weight

              5.91 pounds

              Highlight Features

              Futuristic design
              Two running modes & able to heat and cool a space
              Intelligent Thermostat
              Auto-shutoff whenever tipping over, no heating elements exposed nor fast-spinning blades

              Verdict

              Through years of testing and finding the best quality space heater, we have found nothing that can beat this Dyson.

              Best Radiant Heater: DeLonghi Oil-Filled Radiator Space Heater

              DeLonghi Oil-Filled Radiator Space Heater
              DeLonghi Oil-Filled Radiator Space Heater
              9Outstanding
              Pros
              • Controllable and customizable – three heat settings and an adjustable thermostat
              • Simple to use – no assembly requirement & no maintenance
              • Run quietly – oil-filled design with no loud fans or blowers
              Cons
              • Wish the wheels were designed to be neater
              • The fins get hot to the touch
              • No remote control

              You’re going to love this model if what you actually need is a good radiant heater.

              It looks neat, requires no assembly nor maintenance, and is easy to use. Providing three different heat settings and an adjustable thermostat, allows you to customize the heat to your comfort.

              The unit is also good at heat retention, meaning that it helps you cut off lots of energy and save more.

              About our most favorite feature, it is the operating noise. As this is an oil-filled model which has no loud fans nor blowers, it runs extremely quiet and we’d love suggesting it for bedrooms or office rooms.

              DeLonghi Oil-Filled Radiator Space Heater Specifications

              Heat Settings

              Min - 700W, Mid - 800W, Max - 1500W.

              Heating Area

              300-400 square feet

              Timer

              no

              Dimensions

              5.9 x 13.78 x 24.9 inches

              Weight

              23.2 pounds

              Highlight Features

              Three heat settings and an adjustable thermostat
              No assembly requirement & no maintenance
              Oil-filled design with no loud fans or blowers

              Verdict

              This DeLonghi is just the ticket if you are looking for a steady, gentle, and quiet radiant heater

              Best Wall Mounted: Stiebel Eltron 074057

              Stiebel Eltron 074057
              Stiebel Eltron 074057
              9Outstanding
              Pros
              • Heat a space up pleasantly - down-draft construction
              • Convenient to use - an on/off switch, frost protection setting, a 60-minute booster timer, and integrated thermostat
              • Ultra-quiet - a 49dB radial type blower and 49.7dB squirrel cage type blowers
              Cons
              • There’s no way to hide the wire from the wall to the heater
              • The fan could be stronger

              The Stiebel Eltron 074057 has the most outstanding performance out of numerous wall-mounted heaters that we’ve tested.

              Boasting down-draft construction, it heats a space up evenly in the most comfortable way, and is able to warm a maximum area of 215 square feet, which really wowed us.

              Besides, you’ll have got lots of practical add-ons from this design, such as an on/off switch, frost protection setting, a 60-minute booster timer, and an integrated thermostat to adjust the temp from 41 to 86 degrees F.

              A big bonus is its ultra-quiet operation, boasting a 49dB radial type blower and 49.7dB squirrel cage type blowers. This will make it a very great choice for people who really hate noise.

              Stiebel Eltron 074057 Specifications

              Heat Settings

              41–86°F (5–30°C)

              Heating Area

              215 sq. ft.

              Timer

              60-minute timer

              Dimensions

              20.08 x 15.35 x 6.3 inches

              Weight

              8 pounds

              Highlight Features

              Down-draft construction
              An on/off switch, frost protection setting, a 60-minute booster timer, and integrated thermostat
              A 49dB radial type blower and 49.7dB squirrel cage type blowers

              Verdict

              The Stiebel Eltron 074057 is the most quality and best performer you could find on the market when searching for a wall-mounted heater.

              Best Panel Heater: De'Longhi Mica HMP1500

              Pros
              • Versatile – able to be used as a wall-mounted or a standing heater
              • Space-saving – slim design
              • Portable and maneuverable - the added castors and carrying handle
              Cons
              • The markings on the dials are very hard to read.

              De'Longhi Mica HMP1500 is the best solution for those homeowners who love having a heater but don’t want it to cramp up their space.

              It is one of the slimmest designs on the market and probably the most versatile here. You can let the product stand on its own or mount it anywhere wanted.

              We do appreciate the added castors and carrying handle to make it more portable and easy to move around.

              There are two heating modes, high (1500W) and low (750W), to choose from. It’s also built with full safety features, such as power indicator lights, an internal tip-over switch, and a safety thermal cut-off.

              De'Longhi Mica HMP1500 Specifications

              Heat Settings

              2

              Heating Area

              300 sq. ft.

              Timer

              no

              Dimensions

              27 x 10 x 22 inches

              Weight

              15.43 pounds

              Highlight Features

              Able to be used as a wall-mounted or a stand heater
              Slim design
              Castors and carrying handle

              Verdict

              If you’re looking for the best panel heater, we’ll tell you, this De'Longhi is basically awesome to try.

              Quietest: Dr Infrared Heater Portable Space Heater

              Dr Infrared Heater Portable Space Heater
              Dr Infrared Heater Portable Space Heater
              8Good
              Pros
              • Superbly quiet during the use – emit only 39 decibels
              • Extra convenience – compatible with a remote control
              • Safe and trusted - UL listed
              Cons
              • The remote control has no button to power it off
              • Its cabinet quality could be better
              • The indicator lights are too bright to use at night, in a bedroom

              Compared to others, this Dr Infrared is insanely quieter.

              From our measuring results, its fan emits only 39 decibels so although this comes with no fan speed setting, we don’t find that a real matter at all. If asked to describe how quiet it is, this heater would be as smooth-sounding as a white noise machine.

              Besides, it comes with a remote control for much more convenience during the use, and there is a 12-hour timer.

              If you prefer some technical information, it is UL listed for safety.

              Dr Infrared Heater Portable Space Heater Specifications

              Heat Settings

              3

              Heating Area

              750sq

              Timer

              12-hour timer

              Dimensions

              13 x 12.5 x 17 inches

              Weight

              24 lbs.

              Highlight Features

              Noise level of 39 decibels
              Compatible with remote control
              UL listed

              Verdict

              Despite its modest silhouette, the Dr Infrared Heater is superior to other similar counterparts, especially in terms of quiet operation.

              Best For Extra-Large Rooms: Lifesmart Lifelux 8

              Lifesmart Lifelux 8
              Lifesmart Lifelux 8
              8Good
              Pros
              • Powerful – heating coverage of 1500 square feet
              • Energy-efficient – eco mode & a 12-hour timer
              Cons
              • The power switch is not really quality

              This commercial-grade heater is flawless for extra-large spaces, such as workshops, garages, or studio apartments.

              Its heating coverage is 1500 square feet and there are three settings – eco, low, and high – along with a 12-hour timer.

              It kicks out a good amount of heat to keep an entire drafty room toasty warm during sub-zero cold weather. Once reading the desired temperature, it will automatically turn off.

              The design looks beautiful and matches greatly to those vintage-styled rooms.

              Lifesmart Lifelux 8 Specifications

              Heat Settings

              3

              Heating Area

              1500 square feet

              Timer

              12-hour timer

              Dimensions

              16.25 x 15.25 x 18.5 inches

              Weight

              31 pounds

              Highlight Features

              Heating coverage of 1500 square feet
              Eco mode & a 12-hour timer

              Verdict

              The Lifesmart Lifelux 8 is powerful enough to warm up a 1500-square-foot space without pilling up the bills, which makes it unrivaled.

              How To Choose The Most Efficient Space Heater For Large Rooms?

              Types

              First of all, when it comes to choosing a space heater, you need to know all the types and figure out which type is suitable for you.


              Highlight features

              Pros

              Cons

              Convection heaters

              Work by warming the surrounding air

              Most energy-efficient

              The room remains warm after it’s turned off

              Maintain moisture and humidity

              Work well against mold

              Take longer to heat up a room

              No residual heat

              Infrared heaters

              Direct heat at people

              Warm up the room quickly

              20% more energy-efficient than convection heaters

              The room loses heat quickly after the device is turned off

              Ceramic heaters

              Circulate air and focus the heat on people

              Remain cool to the touch during operation

              Cheap

              More complex

              Panel heaters

              Heat up the room quickly and circulate air around the room

              Heat up the room quickly and entirely


              Apart from these types of heater, there is another type called petroleum-fueled. These heaters are more energy-efficient than other heaters, but they are more dangerous, less versatile, and not suitable for indoor use.

              Btu Output And Energy Efficiency

              The best space heater for a large room must produce the right amount of heat for the room while using less energy. A heater with a higher BTU rating will offer better performance. If a heater display its heating power in wattage, here’s how to convert it into BTU: BTU output = heater wattage rating x 3.413.

              To see how energy-efficient a heater is, you can check the figure on the heater then divide it by 1,000. For example, a 1,500W heater will consume 1.5kW per hour.

              You should balance these two figures to get large BTU output along with energy efficiency.

              Size

              The heater you choose must be suitable for the room in terms of size, which is directly related to the BTU output. To know which size is the best, you need to know the exact size of the room and calculate the required BTU output using the following formula:

              Room length x room width x 10 x 3.41 = required BTU output for a room

              Which Brands Make The Most Efficient Space Heater For Large Rooms?

              Dyson

              With 28 years of experience in household appliances, Dyson offers a wide range of selection for space heaters so you will freely pick out the best for your house.

              De'Longhi

              Founded in 1902, this brand focuses on making products with innovation, style, and good performance to satisfy consumers around the world. Its products will ensure the joy to use, unique features, and distinctive design.

              Stiebel-Eltron

              Over the past 96 years, this brand has been well-known for energy efficiency that comes with its products. So if you really care about saving energy, this could be your go-to brand.

              Dr. Infrared Heater

              If you have decided to opt for an infrared space heater, you should start with this brand as this is its main product line. Its products will heat up your room quickly, offering various features for comfortable use like remote control, electronic thermostat, and low-noise blower.

              FAQs

              How much does a space heater add to electric bill?

              The answer to this question depends on how you use space heaters. If you leave it on all day, the bill will go up fast. If you want to find out how much a specific heater can cost in terms of electricity, you can check for its wattage, divide by 1,000, then multiply with the electricity price where you live.

              Is space heater good for health?

              Electric space heaters, like the ones we mentioned in this post, are safe for health when using indoors because they do not emit exhaust or cause air quality concerns.

              Can I leave my space heater on overnight?

              Space heaters pose risks of a fire hazard, so as soon as you’re done using the heater, you should turn it off. They shouldn’t be left on all night or when you sleep.

              Is it cheaper to run the heat or a space heater?

              If you use the space heater just for one or two rooms, it can be cheaper than the central heat. However, if you heat up the entire house with space heaters, it will cost more.

              Is ceramic or infrared heater better?

              After all, this comes down to your preference, whether you want directed heat to a specific spot for the warm surrounding air.

              To compare, infrared heaters are hotter to the touch but overall better for your health. They are quieter too. However, ceramic heaters are particularly better for large rooms.

              Conclusion

              At this point, we hope that our detailed guideline has provided you with all the necessary information to help you choose the most efficient space heater for large rooms. There is a lot of work to do when figuring out what space heater is suitable for your place, but it will pay off. Therefore, don’t bother spending a bit extra time on this decision.


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