The 9 Best Heaters For Large Rooms Review – Top Picks 2022

Last Updated on January 31, 2022 by Vernon Scott

I don’t like being cold. That becomes truer as I am getting older. It is the reason why we will discuss the best space heaters for everyone’s needs. I tried dozens of them over the years, and I concluded that it’s easy to heat up a small room. 

The problem occurs when you need to warm a large space. You need a reliable and powerful unit, but you also want it to be efficient because you don’t want to end up with a huge utility bill.

Allow me to share my experiences and recommend the best heaters for larger rooms on the market at the moment.

9 Best Large Room Heater Reviews 2022

1. Vornado MVH Whole Room Vortex Heater, Black

Vornado MVH Whole Room Vortex Heater, Black

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Vornado’s product uses Vortex technology patented by the manufacturer. In its core, this is a fan heater that circulates the air throughout the room.

That is how it delivers constant and uniform heat in all parts of the room.

Despite the fact that it uses a fan, the unit is pretty silent, and the noise won’t bother you.

MVH Vortex Heater has three different heat settings. The lowest one offers 750W of power (approximately 2,500 BTUs), while the highest delivers 1,500W (5,100 BTU).

The safety features include tip-over protection and automatic shut-off system, as well as a case that is cool to touch. The product comes with a 5-year warranty.

2. DeLonghi TRD40615E – Best Oil Heater for Large Room

DeLonghi TRD40615E Full Room Radiant Heater

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DeLonghi TRD40615E uses radiant heat to provide warmth. It packs 1,500W of power, which is enough for 150 square feet of space. However, this is considered to be a personal heater.

That means that it will best heat the area in the vicinity of the unit. The good news is that you don’t have to refill the oil reservoir because it is permanently sealed.

The unit has several levels of heat to choose from, as well as a thermostat that is adjustable.

This oil filled radiator heater also has an auto-off timer feature to program the product. If you want to lower the heating cost, you can use the ECO mode, which automatically adjusts power and heat for most economical warmth.

According to my experience this is the best space heater for large living room.

3. Cadet Com-Pak Twin 3000W, 240V Electric Space Heater For Large Room

Cadet Com-Pak Twin 3000W, 240V Most Popular Large Room Electric Wall Heater with Thermostat

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You won’t find many better wall heaters than this one. Cadet Com-Pak Twin Electric Wall Heater is quiet but efficient.

It uses a fan to spread the heat, and it does an excellent job of doing so. It has the power of 3,000W.

That is enough for 300 square feet, which puts this into the category of large room heaters. The adjustable thermostat helps you put this power under control.

The fact that you mount it on a wall is an incredible space saver. The unit has an automatic turn-off feature in case that the operating temperatures are above average. Those of you that appreciate aesthetics will appreciate high gloss powder coating. 

4. Dyna-Glo WK24BK Indoor Kerosene Convection Heater

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Another insanely powerful heater on our list is the Dyna-Glo WK24BK Indoor Kerosene Convection Heater.

By using kerosene as its fuel source, the heater can heat up to 23,800 BTU per hour. This product is the black version, but a white one with a higher price is available.

This uniquely designed heater has the ability to warm 1,000 sq. ft. of area. But, since it doesn’t use electricity, you can save up a good amount.

It is suitable for daily usage. But you can also use it for emergency times or during a sudden cold day.

You can operate the heater without any problem as it can ignite automatically with a push trigger. Also, to turn it off, you only need to touch a button. There is a dial to adjust the heat. It can run for 8 to 12 hours with 1.9 gallons of kerosene.

5. LifeSmart ZCHT1071US Quartz Ifrared Electric Heater

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The LifeSmart ZCHT1071US Quartz Infrared Electric Heater comes with a durable body and slick design for your convenience.

Featuring a high power of 1500 W, it can provide a high heat output. Even the remote it comes with is durable too. As a powerful heater, the device can heat a maximum area of 1,000 sq. ft.

So, it is suitable for large rooms. It uses infrared quartz for heating while keeping it in a safe amount.

You can set the heating output among three settings, namely low, high, and eco mode.

Apparently, you can set a timer on this machine that will automatically turn it on or off within a maximum of 12 hours. The metal case stays cool during use and will keep the whole heater safe.

It has a thermostat that keeps the heater on until your room gets to a certain temperature.

6. Lasko 758000 Cyclonic Ceramic Heater

Lasko 758000 Cyclonic Ceramic Heater

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Lasko 758000 Cyclonic Ceramic Heater is ideal for providing supplemental heat to your primary heating system.

It is portable and has a small footprint, which makes it a true space saver. 

The cyclonic technology takes the cold air through the bottom, warms it up, and circulates out via the top. You can adjust the direction of the warm air via the lever.

The heater delivers up to 1,500W of heat and has a digital thermostat. You can use it to set the desired temperature easily. This might be the best space heater for large room in this list.

As for safety, overheat protection is included, and the ceramic element comes with a self-regulating feature. You can also use the automatic off timer that you can program for up to 7 hours in advance.

7. PLEMO Large Room Electric Heater with Adjustable Thermostat

PLEMO Electric Ceramic Heater 750 W/1500 W Oscillating Fan Heater with Adjustable Thermostat

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This is a ceramic heater made of flame-resistant and durable ABS material. It is equipped with safety features such as overheating and tip-over protection, and it is entirely risk-free to use.

The PTC elements it uses for heating the space are efficient. The secret of efficiency lies in the 90-degree oscillation.

Thanks to that wide angle, it can heat up a room quickly.

The thermostat has two settings – low and high heat. The first option delivers 750W, while the second one is twice as strong. If you move it to a smaller space, you can also use the airflow mode to maintain the heat.

This is lightweight and has a small footprint, which makes it perfect for moving around. It’s not only called as large room heater but also extra large room space heater.

8. Mr. Heater California Approved “BIG Buddy” Propane Portable Heater for Large Room

Mr. Heater MH18B California Approved "BIG Buddy" Indoor Safe Propane Heater

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The unit is powered by two 1-pound propane tanks. That enables it to deliver up to 18,000 BTUs of heat.

If you do the math, that should be enough to heat up to 300-400 square feet of space.

Although it is a propane heater, it is approved for indoor use. It has tip-over protection, and it features ODS – Oxygen Depletion Sensor.

The efficiency of Mr. Heater MH18B Portable Propane Heater is impressive. It uses both convection and radiant heat to deliver the best results. One of the best rated space heater for large room.

The unit has three different heat settings and a knob to choose between them. Keep in mind that the model might have problems performing at altitudes higher than 7,000 feet above sea level.

9. Sengoku CV-2230 KeroHeat Convection 23,000-BTU – Extra Large Room Heater

Sengoku CV-2230 KeroHeat Convection 23,000-BTU Portable Kerosene Heater

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Sengoku has been around for decades, and they have a tradition of building reliable heating sources. CV-2230 KeroHeat is powered by kerosene, and it can deliver up to 23,000 BTUs of heat per hour.

That means it is suitable for spaces of up to 750 square feet, which makes it an excellent large room heater.

This kerosene heater is powered by 1.9-gallon tank of kerosene. You start the product by simply pressing a button.

The full capacity of the cylinder can provide approximately 10 hours of heating. You can take a look at a fuel gauge to see how much fuel is left in the tank. The model comes with batteries and a siphon pump and has the automatic shut-off safety feature.

Buying Guide – Best Heaters For Large Room

There is no better way of raising warmth in rooms than purchasing a heater. However, it’s not easy to select the perfect unit for your needs. Here are the things you need to focus on when choosing a suitable heater:

Heater Type

Depending on the technology they use, you can choose from:

  • Convection heaters
  • Radiant heaters
  • Micathermic heaters

Convection heaters are ideal if you want to add warmth to a single room. They are efficient, and they can keep the area warm for long.  Convection heaters deliver even heat by circulating air across whole rooms.

The recommendation is to buy one of these units if people spend a lot of time in the room you want to heat.

Radiant heaters work differently than their convection counterparts. Instead of focusing on the entire space, the warmth they provide is best felt in front of the unit.

As a result, that specific area can be warmed up quickly Infrared heaters offer similar results. However, that does not make them ideal for large rooms.

Micathermic heaters are a combination of the two. They have a panel that radiates the heat, and the air then circulates across the heating space.

Micathermic units don’t use a fan, and they work silently. The fact that they are without a fan also means that they don’t recirculate allergens or dust. 

Heater Design

Here we have four types to consider:

  • Wall heaters
  • Floor heaters
  • Personal heaters
  • Baseboard heaters

Wall heaters, as the word suggests, are mounted on walls. Various models are offered, such as electric fan heaters, fireplaces, and panel units. They are ideal for delivering supplemental heat in cold spots. 

Floor heaters, in most cases, have a vertical design and a small footprint that saves space. They are portable and usually use fans to heat the room.

Personal heaters focus on the area in front of them. They are ideal if you want to keep yourself warm or deliver warmth to a small portion of space instantly.

Baseboard heaters deliver constant heat, and they are silent. They start from the floor and heat the air up to the ceiling. People often put them in basements as they can offset drafts, especially if you install them under windows.


Before moving to other features, you should consider safety. Companies that design heaters should have keeping their users safe as a top priority.

Look for evidence that the components have been tested for faults and hazards and security certificates issued by authorities. Favorite safety features include overheat and tip-over protection switches.

Other features

Here are several other features that you want to keep in mind when choosing a large room heater:

  • Noise level – the units that have fans will produce more noise than those without one. However, newer heaters with fans can also be silent
  • Multiple heat settings – these will allow you to choose the warmth level you want for the room
  • Remote control – you’d want to be able to control the unit from a far
  • Energy saving – some units also offer modes where the usage of energy can be decreased, which also lowers the cost

How Many BTU Do You Need Per Square Foot?

When purchasing a heater, the crucial thing to make sure is that it has the power to warm the planned space. There are two ways to check that – wattage and BTU output. Wattage is the heating power a unit can deliver. The general rule is that you need 10 watts per square foot. 

However, most people focus on BTUs when calculating the heat output. The reason why this is the case is that BTU rating measures heating capacity instead of power.

A BTU is an abbreviation for British Thermal Unit. You can calculate it by multiplying the wattage power of the heater with 3.41. So, every watt of power will equal 3.41BTUs regarding heat output.

If we do the math, we can see that approximately 51,150 BTUs of heat is needed to heat 1500 square feet. This might mean that you will need to purchase several heaters to heat that large room properly. 

When you are using space heaters for large spaces, you also want to know how much it will cost you. That is why I want to reveal a simple equation that you can use to calculate the daily operational cost.

To determine the price, you need to multiply operating time with electricity rate and kilowatts per hour. To find out the last one, check out the wattage output and divide it by 1,000. For example, an average 800-watt heater will use 0.8 KW per hour.

What Size of Heater Do I Need? How It Measures?

The size of the heater that you need is proportionate to the size of the room you plan to heat. If you think about it, that sounds perfectly logical. In the end, it all comes down to whether the heater will be capable of delivering the results you expect from it.

That is why the BTU power should be your primary consideration. In general, the experts recommend that a minimum used for calculation should be 30 BTUs per square foot. However, there are several factors you need to consider that may increase this number.


The very first thing you want to consider is climate. If you are living in cold areas, there is a good chance that you will need extra BTUs to heat the room properly.

The general rule is that you should take a look at your geographical location and its position compared to the equator. The further away you are from it, the more BTUs you will need. If you are living in the United States, you can take a look at the recommended BTU amounts on this website.

Insulation and State of the Room

The next thing you want to consider is the age of the house or the room you are planning to heat. The general rule is that newer spaces will have better insulation than those built decades ago. That is because the building codes have changed for the better.

If you believe that the area you are heating is well insulated, there is no need for extra power. On the other hand, if it’s an old room prone to drafts, take a look at the heating zone chart and use the upper BTU limit.

Here are a couple of pointers that can help you:

  • The number of windows will increase the possibility of drafts
  • Low ceilings mean that space can heat up quickly. High ceilings require extra warmth
  • If a lot of people is in the room, it will take less time to get it warm

Measure the Total BTUs Needed

At this point, you’ve decided how many BTUs you need per hour to properly warm up that large room. Now, all you need to do is to calculate the total BTU amount required.

To do this, multiply that number by the square footage. For example, if you want 35 BTUs of heat per square foot and you have 1,000 square feet of space you will need 35,000 BTUs of power in total.

Final Thought

It seems that we have reached the end of the article about the best large room space heater. I am glad that I’ve got the chance to share my knowledge. I hope that you enjoyed reading the review and that you found out useful information from it.

The crucial thing to keep in mind is the size of the room you want to warm. Your primary concern should be to choose the space heater based on that information. I hope that this guide has answered all the questions you had about the issue. If you do any dilemma remaining, don’t hesitate to contact me and ask – I will gladly help you!

Vernon Scott

Vernon Scott

I am a Trained HVAC Technician and Author of EmiNick. I have been in the industry for over 10 years and have gained a wealth of knowledge and experience. I have been involved in all aspects of HVAC, from design and installation to repair and maintenance. I am also a certified energy auditor and have experience in conducting energy audits for both residential and commercial customers. In addition to my HVAC experience, I am also a certified home inspector and have conducted many home inspections for both buyers and sellers. Follow Me: Linkedin

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