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.
Quick Look
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 get validated by multiple teams before being published on our website to ensure you can accurately compare the results side by side.
Check out our How We Test Air Purifiers article to learn more about our purchasing, testing, and writing procedures.
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Best Large Room Air Purifier
Pets8.5Bedroom8.2Particle Filtration Rate8.6Particle Concentration7.9Air Cleaning Rate405 m³/HourSee all our test resultsAverage Final 0.3 µm Concentration77 particles/LThe 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.
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Best Mid-Range Large Room Air Purifier
Pets7.5Bedroom6.0Particle Filtration Rate8.3Particle Concentration8.9Air Cleaning Rate339 m³/HourSee all our test resultsAverage Final 0.3 µm Concentration35 particles/LCheck out the Honeywell HPA300 if you want something a little less expensive. It isn't nearly as sophisticated as the much pricier NuWave Oxypure, sporting a more basic two-stage filtration system that comprises a carbon pre-filter sheet for trapping odors and three separate HEPA filters, and unlike the NuWave, these filters aren't washable. That said, not only is it much cheaper, to the point where you could easily afford two of these units for the same price as a single NuWave, but its performance is also fantastic. Its clean air delivery rate is more than a match for the pricier model, making it a wonderful option for larger homes.
Unfortunately, while it's quieter than the DIY Corsi-Rosenthal Box mentioned below, it's certainly louder than most other options at its lowest fan speed, so it might not be the best choice for bedrooms and the like. It lacks Wi-Fi connectivity, too, so you can't operate the unit while you're away from home. If that's a must-have feature, the Levoit Core 600S is a smart option with only marginally lower clean air delivery rate, though it's normally only available at a higher price point.
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Best Budget Large Room Air Purifier
Pets8.1Bedroom8.4Particle Filtration Rate8.0Particle Concentration9.6Air Cleaning Rate268 m³/HourSee all our test resultsAverage Final 0.3 µm Concentration13 particles/LThe best air purifier for large rooms we've tested at a budget price point is the Levoit Vital 200S. Next to bigger, pricier models like the Honeywell HPA300 and the NuWave OxyPure, not to mention homebrewed solutions like a full-sized Corsi-Rosenthal Box, this air purifier can't quite compete in terms of clean air delivery rate. That said, its performance is generally sufficient for most room sizes, and for truly large rooms, you can always buy a second one for close to the same price as one of the other units listed. Despite its main filter lacking HEPA certification, this unit's particle filtration performance is comparable to the other models on this list. Its washable pre-filter and generously sized air intake also make it a good option for pet owners, keeping hair from impeding airflow. Beyond that, this unit can be operated remotely using the VeSync companion app, which also allows you to monitor an estimate of air quality in real time. It runs quietly, too, making it a good option for use in bedrooms.
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Best DIY Large Room Air Purifier
Pets7.7Bedroom4.3Particle Filtration Rate9.5Particle Concentration8.8Air Cleaning Rate587 m³/HourSee all our test resultsAverage Final 0.3 µm Concentration38 particles/LIf 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
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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 Vital 200S that delivers similar overall performance. That said, it lacks a washable pre-filter for trapping larger particles before they can dirty the main filter.
See our review
Recent Updates
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.
Oct 23, 2024:
Small text changes for clarity and conciseness. Picks remain unchanged.
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.