Last Updated on September, 27th 2020
As I have become more aware of air pollution, I was surprised to learn that it’s not just an outdoor problem. Indoor air quality can also affect our health and quality of life. When I set out to try to solve this problem using an air purifier, I was unprepared for the overwhelming amount of air purifier products and solutions that make bold claims about purifying the air in the home using a HEPA filter.
Best Large Room Air Purifier
- RabbitAir MinusA2 HEPA Air Purifier
- LEVOIT HV-H134 True HEPA Air Purifier
- IQAir HealthPro Plus Air Purifier
- Coway AIRMEGA 400 Smart Air Purifier
- Alen BreatheSmart Classic Air Purifier
After lots of research, I’ve put together a air purifier guide that should help you find the best large room air purifier that will help you keep the best air in your home free of pollutants and protect your long-term health. Whether you’re looking for an air purifier that is affordable and efficient or you’d like to go all out and make no compromises on the an air purifier, I’ve got you covered.
5 Best Large Room Air Purifiers Reviews in 2020
After reviewing what seemed like hundreds of air purifiers, I had the difficult task of narrowing down the selection to my top 5 choices for the best air purifiers for a large room. To qualify, a large room air purifier has to be able to cover at least 300 square feet.
1. RabbitAir MinusA2 HEPA Air Purifier
The RabbitAir MinusA2 HEPA air purifier is the most technologically advanced unit I reviewed, and some of its features are the best that the industry has to offer. The first thing you notice about the device is that it is incredibly compact and slim. It is also the only unit that can work as a stand-alone or a wall-mounted unit.
The sleek, digital design is bolstered with the best 6-stage air filtration system I have ever seen. Stage 1 is the prefiltration of large allergens and dust. Stage 2 is medium filtration of up to 1 microns. Stage 3 is the BioGS HEPA filter with 99.97% efficiency up to 0.03 microns. Stage 4 is a custom filter of your choice (RabbitAir offers Germ Defense, Pet Allergy, Odor Remover or Toxin Remover). Stage 5 is a charcoal-based activated carbon filter. Step 6 is a negative ion generator.
Although it comes with superior air filtration technology, the unit sacrifices the capacity to achieve air quality. In most cases, the unit should cover a large room of up to 800 square feet but only at 2 air changes every hour. Extremely sensitive individuals should settle for coverage of up to 400 square feet.
- Great performance at a mid-range price
- Fantastic 6-stage air filtration system
- Sleek design fits into modern decor; wall mountable
- Nearly-silent and energy-efficient unit
- Smart-compatible unit with a number of presets and features
- Limited capacity; performs best in rooms of up to 400 square feet and maxes out at 800 square feet
- Fan design is not durable and has a fairly short life span
- In case of a power outage, you will lose all your settings and presets
2. LEVOIT HV-H134 True HEPA Air Purifier
The LEVOIT HV-H134 True HEPA Air Purifier comes in a unique tower design that takes up less space and is more discrete compared to most of the air purifier units in the market. Levoit is a relatively new and unknown company, founded in 2017 in California. HV-V134 is their take on an air purifier for large rooms.
One of the key advantages of Levoit HV-H134 is the patented 3-stage air filtration system, which includes pre-filtration for the removal of lint, fibers, hair, and pet fur, an H13 True HEPA filter for smaller particles, and an activated carbon filter for odors, harmful chemicals, and gases. The company claims that their True HEPA filter technology outperforms the 99.97% efficiency of up to 0.03-micron particles that most True HEPA filter devices offer.
All Levoit devices utilize smart technologies and integrate with your smartphone and/or tablet. The device comes with a number of presets and programs, but it can be custom programmed easily. HV-H134 is strong enough to provide 2 changes in room air in larger rooms up to 1,250 square feet.
Levoit HV-H134 is one of the most affordable True HEPA filter air purifier products for larger rooms that I reviewed. Most of the air purifiers with these features usually command double the price on the market. If you are looking for one device that will take care of all air purifiers’ tasks and not break your budget, this might be it.
- One of the most affordable large room air purifiers with a True HEPA filter
- Suitable for most large rooms in houses; covers a large room of up to 1,250 square feet
- Efficient removal of dust particles and most of irritants and allergens
- At max capacity averages around 2 room air changes every hour
- Compact and easy to move from one room to another.
- One of the better-looking air purifiers in the market
- The company struggles to provide replacement filters on time
- The filters need to be changed twice every year
- Inefficient at removing odors from large rooms
- Struggles to move large room air under lower settings
3. IQAir HealthPro Plus Air Purifier
IQAir HealthPro Plus Air Purifier is a fantastic all-purpose solution for homes or a large room that successfully removes dust, mold spores, pet dander, pollen and other pollutants from the air. It utilizes superior HyperHEPA air filtration technology that guarantees 99.5% efficiency of removing particles up to 0.003 microns, 10 times smaller than the standard true HEPA filter solutions.
IQAir also has alumina pellet technology that removes harmful chemicals such as formaldehyde, as well as a granulated activated carbon filter that successfully deals with odors and volatile organic compounds (VOC). Coupled with nano-filtration technology in the Hyper HEPA filters, IQ Air HealthPro Plus performs great across a number of air pollutants and can successfully clean the air in even the most problematic rooms.
What really attracted me to this air purifier was the low noise, even at higher settings. It’s also energy efficient, delivering air in a 320-degree pattern and consuming only 27 watts an hour at the lowest setting (215 watts at the highest setting). The IQAir can cover up to 1,125 square feet.
The required maintenance of the this air purifier depends on the type of filter that needs to be replaced. PreMax filters last 18 months, V5-Cell filters 2 years and Hyper HEPA filters 4 years.
IQAir HealthPro Plus delivers the best, medical-grade performance in filtering allergens and asthma triggers while doing a stand-up job on the chemicals, odors, and smoke. While it is not the most affordable air purifier on our list, there are no compromises in terms of performance or build quality.
- Fantastic performance of the Hyper HEPA filter guarantees better than 99.97% efficiency up to 0.03 microns and 99.5% efficiency at 0.003 microns.
- Comes with alumina pellet air filtration for removal of harmful chemicals from rooms
- Includes an activated carbon filter for odors and gases
- Covers a large room up to 1,125 square feet
- Mobile air purifier and easily placed in different areas of your house or large room
- Durable and requires little maintenance except for the filter replacement (every 18 to 48 months, depending on the filter type)
- Quiet operation at only 25 decibels at the lowest setting and 59 decibels at full load
- Power-efficient at 27 watts at the lowest setting, up to 215 watts at the highest setting
- Pricey. Not the most affordable air purifier, regardless of its supreme quality and performance
- Replacement of the filters is more expensive than the market average for similar devices
- The air purifier is fairly large, so it needs a dedicated space to operate
4. Coway AIRMEGA 400 Smart Air Purifier
Coway AIRMEGA 400 Smart Air Purifier takes a different approach to air purification compared to the IQAir HealthPro Plus. You will not find the medical-grade air filtration quality here (let’s be honest, how many people actually need a medical-grade air filtration?) but the addition of several features and smart home integration of the device are the strong points of this air purifier.
At the center of the system is the MAX2 filter, which uses a combination of an activated carbon filter and a true HEPA filter. This air purifier is efficient at removing dust, pet dander, odors, chemicals and gases from rooms. This is where this air purifier shines. With amazing coverage of up to 1,560 square feet, it is one of the strongest air purifiers I reviewed.
Coway AIRMEGA 400 comes with a smart-ready user interface that integrates well with all modern smartphones and tablets. It has a smart sensor that gives instant feedback on current air quality in the large room. Additionally, there is a filter indicator sensor that monitors the health and lifespan of the filters in the device and warns you about the best time to replace them.
The air purifier is nearly silent at the lowest setting and at full load, it hits 45 decibels in a room, which is incredible for a air purifier of such capacity. It also has an ECO mode where it consumes less electricity. In general, the device is energy efficient and averages 64 watts of consumption an hour.
At the highest coverage (1,560 square feet) the air purifier manages 2 air changes per hour of large room air. A large room of around 800 square feet will have a performance of around 4 air changes per hour of large room air.
- Excellent coverage at around 1,560 square feet at 2 air changes per hour; strong enough to cover large rooms
- Combination MAX2 filter has a true HEPA filter and an activated carbon filter, efficient at removing dust, mold spores and pet dander from the large room air
- Excellent performance and capacity at a midrange price; great value for the money
- One of the best air purifiers on the market in terms of smart integration and intelligent design
- Nearly silent at lower operating settings and maxing out at 45 decibels at the highest setting
- Compact and mobile; easily moved between rooms
- A large room air purifier that does not sacrifice design and aesthetics
- Intelligent sensors that provide real-time room air quality feedback, as well as indicators of filter health and replacement notifications
- Activated carbon filter needs changing every six months and is quite expensive
- Room air quality is solid, but far from the industry-leading performance of best large room air purifiers
- Not efficient for allergen removal (but fine for dust and pet dander)
5. Alen BreatheSmart Classic Large Room Air Purifier
I was surprised to find that Alen BreatheSmart Classic air purifier for large rooms is a child of NASA airflow engineers. That gave me the confidence to learn more about the device and try some of its features. It is a beautiful, compact device that will fit into any room and it comes in a variety of colors, making it easy to blend it with your furniture.
The best large room air purifiers boast a True HEPA filter and the Alen BreatheSmart Classic is no different. Efficient at dust, mold spore, and pet dander removal, this device delivers solid performance in large rooms up to 1,100 square feet. The unit averages 2 large room air changes at 1,100 square feet. That is plenty of performance for most large room.
BreatheSmart Classic is one of the best air purifiers when it comes to noise. The device is nearly silent in almost all operating settings, except the at full load, where it sill averages only 43 decibels. The best acoustic performance is at the lower settings.
- One of the best low-noise large room air purifiers in the market
- Eye-catching design that offers plenty of color options
- Powerful and efficient enough to take care of most dust, mold spores, pet dander, and other pollutants
- Sleep mode, with near-silent operation and no notification lights
- Smart integration of air purifier with most smartphone and mobile devices
- Suitable for most large rooms up to 1,100 square feet
- Struggles to keep up with the best large room air purifiers on the market in terms of efficiency and quality of air filtration
- Not the best value for money
What are Air Purifiers?
As the name says, air purifiers are devices that “purify” the air by removing pollutants from it. There are several types of air pollutants, such as dust, mold spores, dust mites, chemicals and odors. They can come in the form of particles or gases, and different technologies are needed to purify different pollutants.
Depending on the type of air purifier and technology it uses, it can be a specialized device that filters only a certain air pollutant such as dust mites or a more all-around solution that uses several filters and technologies to produce the best air quality indoors. Additionally, air purifiers can be integrated into a variety of smart home systems, as well as any present HVAC systems in your house.
The most common types of air purifiers currently available are HEPA filter air purifiers, ozone generators, electrostatic precipitators, ultraviolet light air purifiers, and activated carbon air purifiers. They can all be useful, depending on the pollutants in the indoor air.
How Do Air Purifiers Work?
Most air purifiers (1) have a set of fans that draw in the air into the device, where the air passes through filters that separate pollutants, before pumping the air out of the device and back into the room. But beyond this basic principle, the purification technologies differ vastly.
HEPA filter air purifiers use HEPA filters that remove up to 99.97% of particles up to 0.3 microns in size. HEPA filters also stop the spread of airborne viruses and bacteria.
Ozone generators pump ozone gas and are incredibly efficient at trapping odors. However, ozone is a respiratory irritant that can be harmful to humans if a large concentration is found in the air.
Electrostatic precipitators were the air purifiers of choice in the past. They function by charging airborne particles with a negative electric charge, so they collect on electrostatic plates in the device. Over time, the amount of maintenance needed to clean the plates made this once-popular method all but obsolete.
Ultraviolet light air purifiers use radiation in ultraviolet light to penetrate and destroy airborne viruses and bacteria, instead of collecting them into filters.
Finally, activated carbon filter air purifiers are used for trapping chemicals, gases, and odors, which cannot be collected in HEPA filters or destroyed by using ultraviolet light. Activated carbon filters contain a porous form of carbon that expands when heated, making it ideal for capturing gases and chemicals.
Why Do You Need an Air Purifier?
If you are reading this guide, you’re probably wondering whether you really need to invest in an air purifier (2). Read on for some of the common reasons people find them helpful.
You Have Allergies or Respiratory Issues
No matter how well you clean your house and try to stay indoors during allergy season, it’s almost impossible to do as thorough a job as air purifier with a HEPA filter. It will remove 99.97% of airborne particles that are 0.3 microns or larger. Most air purifiers also come with special filters that further target common allergens.
You Have Kids
Kids’ immune systems aren’t as well developed as adults’, and therefore they’re more sensitive to air pollutants such as viruses and bacteria. Getting an air purifier for the kids’ room or one of the large rooms in the house is the way to go. Indoor air often has more pollutants than the outdoor air, since harmful particles and chemicals tend to collect in household items such as carpets, walls, and furniture.
You Have Pets
If you have pets, an air purifier should be one of your top priorities. The air purifier plays a double role here, as it will protect your pets from air pollutants (pets, like children, are more sensitive than adult humans), while also eliminating pet hair and dander, which are one of the main causes of pet allergies in humans.
You Smoke or Have a Smoker in the House
I hate when my house smells like cigarette smoke and would do anything to get rid of the odors. More important, secondhand cigarette smoke is extremely dangerous and fills the air with carcinogenic pollutants. The best air purifiers will remove the odor of smoke and eliminate the harmful particles from the air.
You Live in an Industrial Area or Area with Heavy Traffic
This one is a no-brainer. The amount of potentially harmful particles, chemicals, and gasses released into the air by industrial facilities is staggering. If you live near such a facility, an air purifier best be one of your priorities. Heavy traffic causes a significant decrease in the quality of the air as well.
You are Thinking of Renovating Your House
If your house is getting up there in years, chances are that once you start renovating it a number of harmful chemicals and particles will make its way into the air inside your house. In the past, building regulations permitted the use of materials that have since been banned because of their harmful effects on humans. An air purify will remove these toxins from the air so you can breathe easily while renovating your house.
You Have a Fireplace
Wood smoke particles from the fireplace can have a negative effect on your respiratory system. By getting an air purifier, you will still enjoy the warmth of a fireplace without compromising your long-term health.
Tips for Choosing the Right Air Purifier for You
When I was choosing an air purifier for my house, I felt overwhelmed by the number of models and types of air purifiers available. To be honest, I had no idea what suited my needs best and what type of device would do a solid job without destroying my budget.
After hours of research, I found these factors crucial in selecting the best air purifier for large rooms for your needs.
Type of Air Purifier
This should always be the starting point in your decision. What kind of pollutants are present in your home? Does your house suffer from odors? Are you worried about pollution from nearby industrial facilities? By identifying the type of pollutant that is affecting your air quality, you can decide what the type of air purifier technology you need.
Most large households will do just fine with a HEPA filter air purifier that will eliminate 99.97% particles up to 0.3 microns, but if your house is full of strange odors and gases, you might need an air purifier with an activated carbon filter.
True HEPA filter vs HEPA-like and HEPA-type
This is a trap you have to avoid. True HEPA filters meet the previously mentioned criteria and have lab certification. Manufacturers sometimes use sales language for their devices, promoting HEPA-like and HEPA-type filters that have no certification. Stay away from those devices.
Room Size and Capacity
The room size you are trying to purify plays a key role in choosing the best air purifiers for your needs. Most air purifiers are rated for room size in square feet (for example, 900 square feet.) Make sure to get the right device for your needs.
The capacity of air purifiers is measured in air changes an hour. The higher the number of air changes an hour, the bigger the capacity the device has. Bear in mind that this only takes into account the rate at which all the air makes its way through the air purifier and does not reflect the efficiency of purification.
Because air changes an hour do not take into account the efficiency of air filters in the air purifiers, a CADR rating is a compound rating that solves this issue. CADR (Clean Air Delivery Rate) takes into account the following:
- Air recirculation rate of the device in CFM (cubic feet per minute)
- The efficiency of the air filter (as a percentage)
The CADR rating is a number given by multiplying a CFM capacity of the device and the efficiency of air filtration. For example, a 400 CFM device with a filtration system of 80% efficiency will give a 320 CADR rating. A 300 CADR rating is the bare minimum you should consider for your home. Anything above 350 CADR is a great unit.
Air Purifier Features
Many air purifiers have other handy features, so think about which features fit your needs. Do you need an air purifier that supports smart home features? Would you like to use your smartphone to adjust its operation? Are energy savings (3) a priority for you? How sensitive are you when it comes to noise?
Each device will have its pros and cons, so make sure that you purchase one that has the features that are important to you and fit the needs of your home.
All five of the products above are quality devices that will help you get rid of indoor pollutants, but the one device that clearly stands above others is the IQAir HealthPro Plus. It is by far the best performing unit with the most advanced HyperHEPA filter that will eliminate an amazing 99.5% of pollutants larger 0.003 microns. It might not be as fancy as AirRabbit’s 6-Stage filtration system, but the quality of the filter wins this one on brute force.
Yes, the Alen BreatheSmart Classic is more silent, the Coway AIRMEGA is more powerful and the Levoit HV-H134 is much more affordable, but none of those units can rival the overall package that IQAir provides. It does come with a hefty price tag, by far the most expensive product in this list, but in terms of value, the situation is not as one-sided.
The filters are extra durable and need changing anywhere from 18 to 48 months. You will need to change filters on other devices at least 3-4 times in that timespan, so it’s important to consider maintenance costs. The build quality and durability of the IQAir unit are supreme, making it an excellent long-term value.
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