Keeping large rooms free of dust and pollutants can be challenging: no matter how much you clean, you still find yourself wiping dust off shelves and tables. It's probably worth investing in an air purifier in these situations. The most important factor to consider when choosing a large room air purifier is overall coverage, handily defined as its clean air delivery rate (CADR). That isn't to say other factors aren't important. Overall particle filtration performance is obviously crucial, but smart features like particle sensors and Wi-Fi connectivity can make for a more hands-off ownership experience where you won't necessarily have to babysit the device as it operates.
We've tested over 25 air purifiers, and below are the best air purifiers for large spaces we've tested. If you want a broader overview of the product landscape, check out our recommendations for the best air purifiers and the best air purifiers for pets. Or, if you only need an air purifier for a smaller room, check out our recommendations for the best air purifiers for bedrooms.
Alternatively, if you're looking for a way of keeping the floors in your living space free of dust and debris, see our recommendations for the best HEPA vacuums and the best vacuums for allergies.
We've independently tested over 25 air purifiers, purchasing each one ourselves like the average consumer would: no cherry-picked samples or talking points from manufacturers. Each unit goes through the same standardized test bench, and the results are validated by multiple teams before being published on our website, so you can accurately compare them side by side.
Check out our How We Test Air Purifiers article to learn more about our purchasing, testing, and writing procedures.
-
Best Large Room Air Purifier
Pets8.5Bedroom8.2Particle Filtration Rate8.6Measured PM1.0 CADR548 m³/hr (323 CFM)See all our test resultsRecommended Room Size @ Max Fan Speed56.2 m² (605 ft²)The NuWave OxyPure is the best air purifier for large rooms we've tested. This premium model provides a very high clean air delivery rate, making it an efficient option in larger spaces. This isn't even its main selling point: the unit's advanced multi-stage filtration system is. Unlike many other air purifiers, which have disposable filters you must replace periodically, the NuWave uses primarily washable parts to reduce ownership costs. This system comprises a stainless steel mesh pre-filter for larger debris, two 'Bio-Guard' filters (for mold, viruses, and bacteria), an ozone filter, and a combined HEPA/pellet-type activated carbon filter. Except for the latter, which you'll need to replace once a year, the rest have an advertised 20-year lifespan. In fact, they only require a wash every couple of months.
This air purifier has particle sensors that allow it to monitor ambient air quality and change the fan speed accordingly. It's also Wi-Fi enabled, so you can operate it remotely using the NuWave Connect companion app. The app lets you check the quality of your home's air while you're away, set operating schedules, or change the device's settings. It operates pretty quietly at lower fan speeds, but it can get loud at higher fan speeds, which is something to note if you have it set up in a living room or bedroom.
-
Best Mid-Range Large Room Air Purifier
Pets8.4Bedroom7.8Particle Filtration Rate8.8Measured PM1.0 CADR617 m³/hr (363 CFM)See all our test resultsRecommended Room Size @ Max Fan Speed52.7 m² (567 ft²)Check out the Levoit Core 600S if you want something a little less expensive for use in larger spaces. There are a few compromises that come with its lower price: instead of the NuWave OxyPure's washable filtration system, the Levoit has a simpler three-stage system with more conventional disposable filters, with no additional specialized ozone or antimicrobial filters. If neither of those aspects bothers you, this is a great option for larger spaces, as this unit is more compact than the NuWave and offers near-equal CADR at its max fan speed, making it a suitable option for apartments or open-concept living spaces. It's a little louder in its lowest fan speed setting than the NuWave, but not by a drastic amount, and it won't be too obtrusive if you run it in this setting while sleeping.
The Levoit is Wi-Fi enabled, allowing you to pair the device with your smartphone and view an estimate of air quality, change the fan speed setting, or see filter change alerts through the VeSync companion app. Beyond that, the 600S also features Google Assistant and Amazon Alexa integration, so you can control it using voice commands.
-
Best Budget Large Room Air Purifier
Pets7.9Bedroom7.7Particle Filtration Rate8.0Measured PM1.0 CADR414 m³/hr (243 CFM)See all our test resultsRecommended Room Size @ Max Fan Speed42.4 m² (456 ft²)The Coway Airmega 200M is one of the most inexpensive ways of keeping the air in larger spaces clean and fresh. Its max CADR is certainly nothing to sneeze at, though it does fall short of the bigger, more expensive units we recommend. Still, it should be suitable for the biggest of bedrooms or offices, and likely enough for most living rooms and dining areas. Unlike the Levoit Core 600S, this unit lacks Wi-Fi connectivity, which isn't likely to be a deal-breaker for most, but worth keeping in mind if you're searching for a hands-free ownership experience. Do note that there is a built-in particle sensor, though, which allows the Coway to automatically adjust its fan speed setting depending on air quality, handy for overnight operation.
Unlike the Levoit or NuWave OxyPure, this air purifier also features an ionizer system, which can help reduce dust buildup. These systems operate by releasing negative ions into the surrounding air, which bond with airborne pollutants and impart them with a like charge and cause them to clump together and fall out of the air, where they can be vacuumed or dusted away later. That said, ionizers produce ozone as an operating byproduct, which can be a respiratory irritant for some. If you don't want to use this feature, you can simply leave it off.
-
Best DIY Large Room Air Purifier
Pets7.7Bedroom4.3Particle Filtration Rate9.5Measured PM1.0 CADR943 m³/hr (555 CFM)See all our test resultsRecommended Room Size @ Max Fan Speed96.7 m² (1,040 ft²)If you need an air purifier for a large space that isn't being lived in, like a workshop or an unfinished basement, consider building your own Corsi-Rosenthal Box. Following this guide, we made our own using a 3M Filtrete air filter set and a Lasko 20-inch box fan. This homemade option lacks quality-of-life features compared to devices like the NuWave OxyPure. There's no particle sensor, Wi-Fi connectivity, or odor-absorbing carbon filter. The latter omission isn't a big deal since most air purifiers with carbon filters we've tested don't contain enough of the material to deal with even moderate levels of volatile compounds effectively. The large box fan is rather noisy, too. To reduce noise and energy consumption, some users have iterated on the design using multiple compact PC fans instead of a single large box fan to draw in air. However, we haven't built such a unit and can't verify if it'll perform similarly.
This basic iteration of a Corsi-Rosenthal Box handily outperforms most other consumer air purifiers on the market, with a sky-high clean air delivery rate and exceptional particle filtration. However, you'll need to dispose of the filters at the end of their useful lifetime. Depending on how often you use the unit, that can be as little as three months, which means it incurs a higher financial and time investment in the long run compared to most conventional consumer units.
Notable Mentions
-
Dyson Purifier Big+Quiet Formaldehyde BP04:
The Dyson Purifier Big+Quiet Formaldehyde BP04 is a good alternative to the NuWave OxyPure if you want something that runs quieter. However, its clean air delivery rate is lower than that of the NuWave.
See our review -
Levoit Core 400S:
The Levoit Core 400S is a very good alternative to the Levoit Core 600S if you're looking for something a little cheaper. That said, its CADR falls some way short, and its footprint isn't that much smaller.
See our review
Recent Updates
Mar 18, 2026:
We swapped out recommendations due to current product availability and new data from version 1.1 of our test bench. We replaced the Honeywell HPA300 with the Levoit Core 600S as the 'Best Mid-Range Large Room Air Purifier' and swapped out the Levoit Vital 200S for the Coway Airmega 200M as the 'Best Budget Large Room Air Purifier' pick.
Dec 12, 2025:
We've replaced the Winix 5500-2 with the Levoit Vital 200S as the 'Best Budget Large Room Air Purifier' pick due to current availability.
Mar 06, 2025:
We corrected the Corsi-Rosenthal Box guide link, plus made minor text changes for readability and clarity.
Jan 28, 2025:
No change in recommendations, as all picks are still valid and available. Small text changes for conciseness and clarity.
Nov 22, 2024:
Ensured all main picks are still available and represent the best option for user needs.
All Reviews
Our recommendations above are some of the best air purifiers for large spaces for most people. We factor in the price, feedback from our visitors, and availability.
That said, there's no single best option that will suit everybody; your needs will depend on your budget, the size of your living space, your tolerance for operating noise, and whether you like having a device with convenience features like Wi-Fi connectivity. If you'd like to choose for yourself, here's the list of all our air purifier reviews, ranked by their clean air delivery rate.