The best air purifiers for small and large spaces
The right air purifier can help clear your air of contaminants like smoke, dust and pollen.
What we like
- Strong filtration
- Competitive price
- Small size
Something to note
- No smart connectivity
This is a great affordable air purifier for small spaces like bedrooms. It’s small, quiet, easy to move around and has strong filtration for its size. NBC Select updates editor Mili Godio keeps it in her bedroom to clear dust and pet hair from the air. It has a sleep mode that runs at a very quiet speed and if you are sensitive to light, the bright LEDs on the top panel can be turned off.
There is also a version with Wi-Fi and app connectivity, the Core 300S-P, but it costs significantly more at $150.
Recommended Room Size (for 4.8 ACH): 222 sq. ft. | Filter lifespan: ~6 to 8 months | CADR (CFM): smoke: 143, dust: 153, pollen: 167 | AHAM verified: Yes | Speeds: 3 | Smart connectivity: no | Decibels: 24 — 54.5 dB(A) | Weight: 7.9 lbs
NBC Select commerce editor Lindsay Schneider received the Airmega 100 air purifier from Coway, and it’s one of her favorite models. It’s easy to set up, intuitive to use and every button has a clear and useful purpose. “It’s truly beginner friendly,” says Schneider.
It has a built-in light that acts as either an air quality indicator, changing colors depending on the detected air quality or a warm amber-colored night light. You can turn the light completely off, too.
Another highlight is that the HEPA filter lasts a full 12 months before you need to replace it, keeping costs down.
Recommended Room Size (for 4.8 ACH): 167 sq. ft. | Filter lifespan: ~12 months | CADR (CFM): smoke: 108, dust: 124, pollen: 112 | AHAM verified: No | Speeds: 4 | Smart connectivity: no | Decibels: 20 — 48 dB(A) | Weight: 6.6 lbs
NBC Select reporter Zoe Malin has used air purifiers for years to combat her dust and allergen sensitivity. It also helps deal with the pet hair of her two cats and small dog floating around.
She uses this Coway air purifier in her living room. Most of the time, she forgets it’s even there — it’s not very noisy and it has an intelligent auto mode, where it automatically changes speeds depending on the air quality detected. It usually stays at the lowest setting, but if she is cooking a large meal, it will change to a higher setting, acting as a good reminder to turn on a vent or maybe open a window, says Malin. Like our other pick from Coway, the HEPA filter lasts a full 12 months before needing replacement; that’s longer lasting than many other competitors.
Recommended Room Size (for 4.8 ACH): 361 sq. ft. | Filter lifespan: ~12 months | CADR (CFM): smoke: 234, dust: 248, pollen: 232 | AHAM verified: No | Speeds: 3 | Smart connectivity: no | Decibels: 24 — 53 dB(A) | Weight: 12.3 lbs
Multiple NBC Select staffers use and love this robust and stylish air purifier from Windmill. Malin, who has dust and allergen sensitivity, has had fewer symptoms ever since she put this unit in her bedroom. Similarly, former NBC Select associate reporter Bianca Alvarez lives with a partner who has asthma and he’s noticed his breathing ease after living with this purifier.
Both Malin and Alvarez use the Windmill Air app to control the unit remotely from their phones — the app lets you easily check your air quality, filter status and set up automated schedules and routines.
The Windmill Air Purifier has another great feature — the child lock function — Malin uses it to prevent her cats from accidentally changing the settings when they inevitably jump on top of the unit. It comes in multiple colors but is pricy and rather heavy at 21 pounds.Plus, the filters only last up to six months, shorter than most competitors.
Recommended room size (for 4.8 ACH): 442 sq. ft. | Filter lifespan: ~6 months | CADR (CFM): smoke: 286, dust: 284, pollen: 343 | AHAM verified: yes | Speeds: 5 | Smart connectivity: yes, Windmill Air app | Decibels: 16 — 54 dB | Weight: 21 lbs
Blueair makes some of our favorite air purifiers — I’ve used a different Blue Pure model in my bedrooms for years, including during 2023’s Canadian wildfire season. On the day of some of the worst air pollution in NYC, the NBC Select office smelled like a BBQ while my apartment, which had a Blueair Pure 311i+ Max air purifier running, smelled completely normal.
The Pure 211i Max is one of the brands largest air purifiers, and has a very powerful filtration fit for large spaces up to 635 square feet. It pulls unfiltered air from all directions into its base, making it easy to place anywhere in your room. It’s also relatively quiet and lightweight despite its larger size and strong filtration.
You can control it manually or with the Blueair app, where you can see detailed stats like indoor air quality and filter status. I use the app to set a schedule for my purifier — it automatically changes to night mode, the lowest and quietest speed, every evening around 9 PM.
Recommended room size (for 4.8 ACH): 635 sq. ft. | Filter lifespan: ~12 months | CADR (CFM): smoke: 410, dust: 410, pollen: 410 | AHAM verified: yes | Speeds: 4 | Smart connectivity: yes, Blueair app | Decibels: 23 — 53 dB | Weight: 16.2 lbs
Air purifiers are designed to remove indoor air pollution caused by fuel-burning appliances, cleaning products, heating and cooling systems, car pollution, wildfire smoke and everything in between. These indoor contaminants can enter your lungs and cause irritation or trigger allergic reactions, says Kenneth Mendez, president of the nonprofit Asthma and Allergy Foundation of America.
Filtration is key when choosing an air purifier. Our experts highlight two factors in getting effective filtration: HEPA filters and an appropriate CADR. You can read more about both in the following FAQ section.
At NBC Select, we work with experts who have specialized knowledge and authority based on relevant training and/or experience. We also take steps to ensure all expert advice and recommendations are made independently and without undisclosed financial conflicts of interest.
I am a reporter at NBC Select who covers technology and fitness including guides to smartwatches, cameras and e-readers. For this piece, I spoke with filtration experts to better understand air purifiers and how they function. I leveraged NBC Select staff and my own experience using air purifiers to recommend the best ones for different room sizes.
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