1. Winix 5500-2 True HEPA
Key Features
For use in rooms up to 360 sq. ft.
Uses a True HEPA filter
Sleep mode, 27.8dB
4 fan speeds
Filter replacement indicator
Includes wireless remote control
To start out, we have the Winix 5500-2 True HEPA suitable for rooms up to 360 square feet. The three-stage filtration system, which includes a washable advanced odor control carbon filter and a True HEPA filter, captures up to 99.97% of particles in the air. With four fan speeds, you can choose your preference and set it to manual mode to run consistently at that fan speed; alternatively, you can choose between turbo or sleep mode, for either maximum air cleaning power or near-silent operation, operating at levels of 27.8 dB. Auto mode allows for hands-free fan adjustment, as the smart sensors will detect the air quality, displayed on the LED indicator, and will adjust fan speed to suit – the dirtier the air, the faster the fan will run; the cleaner the air, the slower the fan will run. A filter replacement indicator will light when you need to change the filters, giving you maximum filter life. Perfect for the kitchen, office or bedroom with its sleek design, this model measures 15 x 8.2 x 23.6 inches, weighs 15.4 pounds, and includes a one-year limited warranty.
Pros
Washable carbon filter
Permanent PlasmaWave filter
Auto mode
Sleek, modern design
LED air quality indicator
Cons
Expensive replacement filters
Can output ozone into the air
Turbo mode is loud
No wheels
Blue lights can interrupt sleep
2. Molekule Air
Key Features
Ideal in rooms up to 600 sq. ft.
Uses PECO nanotechnology
3 fan speeds
360 degree air intake
Wi-Fi connectivity
The Molekule Air Large Room is our premium pick, as it is super sleek and modern and features Photo Electrochemical Oxidation (PECO) nanotechnology to destroy viruses, allergens, mold, bacteria, chemicals, and destroys ozone rather than creating it. Suitable for rooms up to 600 square feet, this purifier features 360-degree air intake and circulates it through the pre-filter; the PECO filter then uses a nanoparticle-coated filter to break pollutants down to their molecular level, allowing them to be destroyed, providing you with perfectly clean air. You can alternate between settings by using the touch screen display or use its smart Wi-Fi features to connect your smartphone for remote control. The convenient leather handle makes this 25.8 pound unit easy to move between rooms.
Pros
Portable
Clean, sleek design
Does not emit ozone
Control via app on smartphone
Check filter status remotely
Cons
Emits high frequency
Expensive replacement filters
No auto mode
Very loud at highest fan speed
Heavy
3. Hathaspace Smart True HEPA
Key Features
Best for rooms up to 350 sq. ft.
5-in-1 filtration system
True HEPA filter
2 air changes per hour
Sleep mode, 20 dB
If you are searching for powerful air cleaning, the Hathaspace Smart True HEPA uses a five in one filtration system featuring a cellular activated carbon filter and a True HEPA filter. Perfect for rooms up to 350 square feet, this can recycle your air twice in an hour, destroying allergens, removing pet dander, dust, mold spores, pollen, and smoke from the air in your home. The air quality sensor provides information about your indoor air quality and displays it, so you always know how clean your air is. You can set it to auto mode so that the fan speed will automatically adjust to clean the air as required. In sleep mode, it is whisper-quiet running at just 20 dB. Its compact, sleek design is the perfect addition for larger rooms, measuring 13.5 x 7 x 19.5 inches and weighs 12 pounds. You will also receive a two-year warranty.
Pros
Auto mode
Wireless remote control
Air quality sensor
Easy to clean pre-filter
UV & ionizer can be turned off
Cons
Expensive replacement filters
Filters need to be replaced often
Air sensor weak on lower settings
No Wi-Fi connectivity
4. Alen BreatheSmart FLEX
Key Features
Good for large rooms up to 700 sq. ft.
Includes True HEPA filter
Designer color panel options
2 air changes per hour
4 fan speeds
With a choice of sleek finishes, the Alen BreatheSmart FLEX Air Purifier is our design pick, perfect for large rooms up to 700 square feet. Its powerful filtration system which features a True HEPA filter, offers two air changes per hour and has a filter life of nine to twelve months when being used 24/7. With whisper-quiet technology, it creates a pink noise frequency that you will find comforting and does not interrupt sleep. You have a choice of four fan speeds, all controlled with the easy to use buttons located on the unit. This unit is lightweight and portable, weighing 15 pounds and measuring 8.5 x 15 x 25 inches.
Pros
9-12 month filter life
Stylish
Turbo mode
Sleep mode
Simple to use
Cons
No air quality sensor
No ionizer feature
Expensive replacement filters
No wireless remote
No auto mode
5. LEVOIT LV-H133 Home
Key Features
Works in large rooms, up to 1,076 sq. ft.
Has a H13 True HEPA air filter
Smart air quality sensor
3 fan speeds
Filter change indicator
For fast, powerful air purifying the LEVOIT LV-H133 Home cleans air in just 30 minutes in large rooms up to 1,076 square feet and only 15 minutes in rooms up to 538 square feet! The ultra-dense H13 True HEPA filter is capable of catching and cleansing air full of particles like lint, pollen, dust, mold spores, dust mites, lead dust, pet dander, smoke, bacteria, and viruses. The activated carbon filter helps remove nasty odors from your home, as well as fumes and chemicals such as ammonia and volatile organic compounds (VOCs). The smart sensors will display current air quality in real-time. With handy features like sleep mode, timers, and a filter indicator, you can be sure of clean air, helping to reduce those miserable allergy symptoms. Its cylinder design is modern and sleek, perfect for your living areas, bedrooms, and office spaces. It measures 23 x 12 x 12 inches and weighs 21 pounds.
Pros
12-hour timer
Sleep mode, 25 dB
Display off function
Fast air purifying
Auto mode
Cons
No Wi-Fi connectivity
Expensive replacement filters
Filters require replacing quite often
Creates a strange smell
6. Coway Airmega 300 Smart
Key Features
Best for large rooms, up to 1,256 sq. ft.
True HEPA filter
Activated carbon filter
Washable pre-filter
Energy Star certified
For large rooms up to 1,256 square feet, the Coway Airmega 300 Smart Large Room cleans your air at least twice per hour. By using a combined Max2 Filter, composed of a True HEPA filter and an activated carbon filter, this purifier can remove dust, mold, pet dander, allergens, VOCs, and other harmful pollutants from your air. The smart pollution sensor will display real-time air quality by an LED ring on the unit. It also has sensors that allow for auto mode, so you can set your purifier and know it will clean your air, no matter what changes occur during the day. A convenient timer with options for either 1, 2, 4, or 8 also gives you more power to choose what works best for your needs. This box-shaped purifier with built-in handles for portability has a modern look to it; it measures 13.6 x 13.6 x 21.2 inches and weighs 21.4 pounds. You will also receive a five-year manufacturer’s limited warranty on this model.
Pros
Filter life time indicator
Quiet sleep mode, 22 dB
Eco-mode
Smart mode with 3 settings
Air quality indicator
Cons
No Wi-Fi connectivity
No remote control
Expensive replacement filters
Air quality indicator unreliable
Bulky
7. Germ Guardian
Key Features
Good for large rooms up to 338 sq. ft.
Uses a True HEPA filter
Recycles air up to 4x per hour
Optional UV C light
Three fan speeds
To eliminate odors, molds, and germs, as well as reducing up to 99.97% of pollutants, dirt, pet dander, and dust, in large rooms up to 338 square feet, the Germ Guardian Home provides powerful air cleaning. The True HEPA filter combined with the activated carbon filter allows for the air to be cleaned up to four times per hour when on the highest setting. Customizable with three fan speeds, an eight-hour timer, and optional UV C light, you are able to set this model to your preferred comfort level. Perfectly sized at 9.6 x 16 x 21.9 inches and weighing 13 pounds, you can easily move this from room to room.
Pros
Energy Star certified
Portable
Ultra-quiet sleep mode
Filter change indicator
8-hour programmable timer
Cons
No Wi-Fi connectivity
Expensive replacement filter
Expensive replacement UV light
Loud on higher settings
Front panel will need to be reseated to turn on
8. BISSELL air360 Smart
Key Features
Ideal for large rooms up to 1,000 sq. ft.
3 stage filtration, including True HEPA
Auto mode
Air quality indicator
Functional design
360 purification
For 360 degree purification, the BISSELL air360 Smart Air Purifier For Large Room filters the air once an hour in rooms up to 1,000 square feet. Using a three-stage air filtration system consisting of a pre-filter, activated carbon filter, and a True HEPA filter, the majority of unwanted odors, germs, allergens, dust, pollen, mold are all reduced from the air. This air purifier offers five fan speeds and includes sleep and auto modes, providing you with maximum comfort, all controlled with intuitive single-touch controls on the unit. Elevated platform legs and a functional, yet attractive, design was considered with you and your home in mind; there is also a cord storage section at the rear of the unit, helping keep your room tidy. This air purifier measures in at 14.5 x 8.5 x 25 inches and weighs 18.25 pounds. In case that this particular air purifier caught your attention, but you’re still indecisive check out our selection of smart air purifiers.
Pros
Easy to operate
5 fan speeds
Ozone free
Cord storage
Every purchase saves pets
Cons
No Wi-Fi connectivity
No remote control
Expensive replacement filters
Hard to move around
Very loud on high settings
9. LEVOIT LV-H134 H13
Key Features
Use for large rooms up to 1,170 sq. ft.
Uses a True HEPA filter
3 fan speeds
Auto mode
360 purification
For air purification of large rooms up to 1,170 square feet in just 30 minutes, the LEVOIT LV-H134 H13 Large Room Air Purifier is the best for your living rooms, bedrooms, offices, and kitchens. The True HEPA filter paired with the activated carbon filter removes airborne particles as small as 0.3 microns and reduces nasty odors in your home. You have a choice of three fan speeds and an option for sleep mode and auto, which will use the purifier’s smart sensors to adjust the fan speed as needed. The advanced laser dust sensor measures the quality of the air and provides you with an accurate reading. This option is quite large, but its highly effective performance and modern design will earn it a well-deserved spot in your home; it measures 32.2 x 15.98 x 15.28 inches and weighs 27.2 pounds.
Pros
1-12 hour timer
Check filter indicator
Display off option
Energy efficient
Whisper-quiet sleep mode, 25 dB
Cons
Loud on high settings
No remote control
No Wi-Fi connectivity
Expensive replacement filters
Filters don’t smell good initially
10. Airthereal APH260
Key Features
Best for large rooms, up to 355 sq. ft.
7-in-1 True HEPA air filter
Smart auto mode
Permanent, optional UV-C & Anion function
Digital air quality display
For high-performance air purification but at a lower cost, our budget pick, the Airthereal APH260 Large Air Purifier, purifies air in rooms up to 355 square feet; you will notice visible results in just ten minutes. This air purifier features a 7-in-1 True HEPA filter to effectively capture and remove 99.97% of air pollutants. In the smart auto mode, the sensors determine the quality of your air and adjust its mode to suit. To accelerate purification, turn on the optional UV-C and Anion function; best of all, there is no replacement required for this, unlike with other models that offer this feature. Adjust your settings and review the quality of air on the LED display with touch screen control. This unit is compact and sleek, enabling it to be moved where required; it measures 13 x 6.7 x 21.2 inches and weighs 10.4 pounds.
Pros
Runs quietly, 49 dB
Sleep mode
0-12 hour timer
Filter change reminder
Affordable
Cons
No Wi-Fi connectivity
No remote control
Loud when on high setting
Sensors can be inaccurate at times
Poor instructions
Features To Consider With Air Purifiers For Large Rooms
Size
When you are shopping for the best air purifiers for large rooms, you will want to consider the size of the purifier itself. Purifiers designed for larger rooms tend to be larger and more robust, yet powerful and durable, in appearance they are quite similar to portable air conditioners. If you are wanting to be able to move your air purifier between rooms, you should consider features that will make it easily portable like wheels and handles; or, it will need to be a manageable weight and size to move easily. Many air purifiers are designed with the modern home in mind, so even though they may be bulkier, they tend to fit well into most spaces. Some units offer customizable panels, so you can be sure it suits wherever you plan to use it.
Noise Level
Noise level is an important feature to consider when looking for air purifiers, especially if you are a light sleeper or if you are planning to use them in office spaces or living areas. Sound is measured in a unit called decibels (dB); normal conversation is typically about 60 dB, so when looking at the best air purifiers for large rooms, you can use that as a comparison. A whisper is 30 dB and the majority of air purifiers operate at this level or lower when in sleep mode. Most air purifiers are loud when on their highest setting as the fan needs to move faster to circulate the air quickly, but with lower speed fan options or sleep mode, you can be assured of a peaceful night's sleep or a successful meeting with no interruptions from a loud air purifier.
Connectivity
If you want to be able to connect your air purifier to your Wi-Fi connection, it will need to be Wi-Fi enabled. Wi-Fi connectivity allows you to remotely control your air purifier from your smartphone. You are then typically able to connect a smart home system, like Amazon Alexa, for voice commands. This is a great feature if you are on the go frequently and need to be able to adjust and control settings from your phone, whether you are home or not!
Filters
The types of filters used within the filtration system of the best air purifiers are an important consideration, to ensure that your air quality is as clean as possible. The best air purifier will feature a True HEPA air filter, which will remove up to 99.97% of airborne pollutants and particles, as small as 0.3 microns. A HEPA filter is able to capture up to 99% of particles 2 microns or larger. Pre-filters are great for initially filtering the air and capturing larger particles; normally, pre-filters are washable, so these do not require replacements. Another filter that can be found in the best large room air purifiers is an activated carbon filter, which removes unwanted odors in your home, such as smoke and volatile organic compounds (VOCs). It's very efficient, but you still need a carbon monoxide detector if you want to know the exact level of CO in your house.
Air Quality Monitor
If you want to be able to see the current quality of your air in real-time, an air purifier would need to include an air quality monitor. The quality of the air is typically displayed either as an LED colored ring, with different colors indicating how clean the air is; alternatively, some use an actual reading. This is a great feature that allows you to see what kinds of things you could be doing that add pollutants to your air that could be harmful to your health. Most air purifiers that have an air quality monitor also will include an auto mode, which will detect the cleanliness of the air and adjust the fan speed as necessary - the cleaner the air, the slower the fan will run, the dirtier the air, the faster the fan will run; this is great for hands-free control, so you can get on with your busy day without worrying about needing to adjust settings. In case your air purifier doesn't have an air quality detector you don't have to worry, you can purchase a specialized air quality monitor as an addition to your air purifier. You can also get a dehumidifier, to maintain the perfect air humidity level in the room.
Room Size
Room size is a crucial factor you need to bear in mind prior to purchasing any air purifiers. All air purifiers will have information about the square footage they cover; it is important to consider the square feet of the large room, or if you have high ceilings, you are wanting to use the air purifier in. If you purchase one that is too small, it will not work well and won't provide effective cleaning. Many air purifiers will speak of their air changes per hour and this is based on the maximum square footage they cover - you will never achieve this if your air purifier is too small for the room in which it is placed. You will notice that many air purifiers speak of clean air delivery rate (CADR), which measures the cubic feet of air filtered per minute; so, the larger the space you are needing an air purifier for, the greater the CADR required to provide effective air cleaning.
Maintenance
To ensure that your air purifier is running at its highest performance, you will need to make sure that the filters are kept clean and replaced when they are dirty. The best air purifiers will have a filter replacement indicator of some sort that will draw your attention to when the filters require replacing. The downside to air purifiers is that the HEPA filters and activated carbon filters require replacing several times a year and there is a recurring cost associated with this. Most pre-filters are washable, so you can use a vacuum or a damp cloth to clean it of dirt and debris that it has collected before fitting it back into the unit. Ease of access to the filters is also a consideration so that you do not need to worry about moving it and fiddling with doors and entry points that may be in places that are harder to access, depending on where you have it positioned.
Other Features
The point at which air intake occurs is also something that you should consider before buying an air purifier; first of all, consider where you would be positioning it in your home, if it needs to be flush against a wall, you will want to find a purifier that features air intake from the top or front of the unit. Some air purifiers offer 360-degree air intake, so it is a good idea to make sure they have adequate space all around when positioning them.
The option of a timer is a good feature, especially if your air purifier does not have Wi-Fi connectivity, sleep, or auto mode that allows for easy control. Being able to set a timer for an air purifier to run constantly at your preferred setting is great if you will be out for a few hours at a time, or perhaps sleeping and you don't want to be disturbed by the fan increasing in speed if it detected a change in the air.
Air purifiers that do not have HEPA filters can emit ozone into the air; however, there are some air purifiers that can create ozone if they have ionizing features. There are some air purifiers that have optional ionizing features or UV C lights, which are great at accelerating air purification but can emit ozone. So, if you suffer from allergies, asthma, or have a chronic obstructive pulmonary disease (COPD), you should always look for an air purifier that is ozone free.
Air Purifier For Large Rooms FAQ
Q: Can an air purifier be too big for a room?
While there is not necessarily anything wrong with using an air purifier that is too large for a room, per se, it is not entirely efficient to do so. If you do use an air purifier that is too big for a room, it will be too powerful, which can end up costing you more money than you needed to spend. If you have bought an air purifier that covers a much larger area than you are wanting to use it in, you can open the door to create a larger area for it to purify air effectively.
Q: Do you need an air purifier for every room?
Realistically, most people do not use an air purifier in every room. Instead, they would choose the most popular rooms, like living areas, offices, and bedrooms, to place their air purifiers.
Q: How long does it take an air purifier to clean a large room?
This is entirely dependent on the fan speed and the size of the large room you are using the air purifier in. In general, most air purifiers can take anywhere between 30 minutes to 2 hours to go through one cycle of air; however, you can begin to notice results in as little as 10 minutes with some units. By making sure that you buy an air purifier that is suitable for the size of the room you are placing it, the air changes per hour will be as per the advertised figure when used on the highest setting - generally once or twice per hour.