This best rated smart air purifier guide ranks five Wi-Fi models by the standout specs on their listings. We compared filter stages, particle sensors, low noise, voice control and coverage per hour.
See also our best smart air purifier and smart air purifier reviews guides. Every pick comes from the makers’ specifications on each Amazon listing, not our own testing, and our Editorial Policy explains how we work. Replace filters on the schedule each maker lists and keep the air intake clear.
Our Top 3 Picks for the Best Rated Smart Air Purifier
Blueair Signature SP4i smart air purifier with 7-stage HEPASilent filtration
- Lists 3,385 sq ft every hour and 705 sq ft in 12.5 minutes
- 7-stage HEPASilent system listed to capture 99.97% of particles down to 0.1 microns
- Blueair app handles fan speed, schedules and settings remotely
Levoit Core 400S smart air purifier with AirSight Plus sensor
- AirSight Plus laser sensor displays the PM2.5 reading in real time
- Auto Mode sets fan speed from live air quality
- Lists both Alexa and Google Assistant
LG PuriCare 360 smart air purifier with PM1.0 sensor
- Micro particle sensor picks up particles down to PM1.0
- Top LED indicator moves from red to green as air quality improves
- NanoFiber True HEPA filter averages a listed 99.97% capture at 0.3 microns
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Top Smart Air Purifiers Compared
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  Blueair Signature SP4i smart air purifier with 7-stage HEPASilent filtration |
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| 2 |  Levoit Core 400S smart air purifier with AirSight Plus sensor |
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| 3 |  LG PuriCare 360 smart air purifier with PM1.0 sensor |
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| 4 |  Levoit Core 200S-P smart air purifier with 360 degree air intake |
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| 5 |  Frigidaire PureA300 smart HEPA air purifier with Wi-Fi app |
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1. Blueair Signature SP4i smart air purifier with 7-stage HEPASilent filtration
Best Overall
- Lists 3,385 sq ft every hour and 705 sq ft in 12.5 minutes
- 7-stage HEPASilent system listed to capture 99.97% of particles down to 0.1 microns
- Blueair app handles fan speed, schedules and settings remotely
- OdorFence Technology is listed to break down odors, gases and VOCs
- Stands 21.2 inches tall, the tallest of these five
- Alexa is the sole listed voice assistant, while Levoit Core 400S and Frigidaire PureA300 add Google Assistant
- Size: 12.5 x 12.5 x 21.2 in
- Fast Clean: 705 sq ft in 12.5 min
- Voice: Alexa
Blueair pairs its 7-stage HEPASilent filtration with Auto Mode, which adjusts purification as indoor air conditions change. The air quality indicator in the outlet shows five colors from blue to red.
Its furniture-style body is designed to double as a side table. Pre-filters come in a range of colors you can swap to match a room.
Right buyer for the Blueair SP4i
It suits open floor plans where the largest hourly coverage in this group matters.
Wrong buyer for the Blueair SP4i
Skip it if you want both major voice assistants, since Frigidaire PureA300 lists Alexa and Google Assistant.
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2. Levoit Core 400S smart air purifier with AirSight Plus sensor
Best Live PM2.5 Readout
- AirSight Plus laser sensor displays the PM2.5 reading in real time
- Auto Mode sets fan speed from live air quality
- Lists both Alexa and Google Assistant
- Sleep Mode can turn the display lights fully off
- Its 3-stage filter trails the 7-stage HEPASilent system on Blueair SP4i
- Weighs 12.8 pounds, heavier than Levoit Core 200S-P at 6.6 and Frigidaire PureA300 at 7.5
- Size: 10.8 x 10.8 x 20.5 in
- Coverage: Up to 1,718 sq ft
- Low Noise: 24 dB
A pre-filter catches lint, hair and pet fur, and an activated carbon filter adsorbs smoke and odors. Levoit lists the Core 400S for spaces up to 1,718 sq ft.
The VeSync app adjusts settings, sets schedules and timers and tracks filter life. Noise is listed as low as 24 dB, and the listing names a child lock.
Right buyer for the Levoit Core 400S
It suits buyers who want to watch PM2.5 numbers and use either voice assistant.
Wrong buyer for the Levoit Core 400S
Skip it if you want the most filter stages, since Blueair SP4i lists a 7-stage system.
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3. LG PuriCare 360 smart air purifier with PM1.0 sensor
Best Fine Particle Sensor
- Micro particle sensor picks up particles down to PM1.0
- Top LED indicator moves from red to green as air quality improves
- NanoFiber True HEPA filter averages a listed 99.97% capture at 0.3 microns
- Quiet setting listed at 23 dB
- Lists 2,059 sq ft at one air change per hour, below Blueair SP4i at 3,385 every hour
- Size: 12.4 x 12.4 x 20.1 in
- Coverage: 2,059 sq ft per hour
- Weight: 14.9 lb
LG surrounds the NanoFiber True HEPA filter with a removable pre-filter and an activated carbon filter. The listing describes 360 degrees of filtration.
LG lists 2,059 sq ft at one air change per hour or 429 sq ft at 4.8. The title names Wi-Fi and an air quality monitor, and the unit weighs 14.9 pounds.
Right buyer for the LG PuriCare 360
It suits rooms large or small where you want the finest listed sensor in this group.
Wrong buyer for the LG PuriCare 360
Skip it if you want the largest hourly coverage, since Blueair SP4i lists 3,385 sq ft every hour.
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4. Levoit Core 200S-P smart air purifier with 360 degree air intake
Most Compact
- Measures 8.1 by 8.1 by 12.6 inches and weighs 6.6 pounds
- 360 degree air intake in a compact body
- A Display Off button shuts every light off
- In-app filter life monitoring
- Lists a 27 dB low, above Frigidaire PureA300 at 20, LG PuriCare 360 at 23 and Levoit Core 400S at 24
- Size: 8.1 x 8.1 x 12.6 in
- Room Size: 140 sq ft at 4.8 ACH
- Weight: 6.6 lb
In a 140 sq ft room, Levoit lists 4.8 air changes per hour for the Core 200S-P. A nylon pre-filter and an activated carbon filter sit in front of the main filter.
The main filter is listed to remove 99.97% of dust, pollen and dander from 0.1 to 0.3 microns. The listing also names Alexa voice control and ETL and FCC certification.
Right buyer for the Levoit Core 200S-P
It suits nurseries, dorm rooms and small offices where space is tight.
Wrong buyer for the Levoit Core 200S-P
Skip it if you want a live air quality readout, since Levoit Core 400S displays PM2.5 in real time.
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5. Frigidaire PureA300 smart HEPA air purifier with Wi-Fi app
Best Low Noise Pick
- Lists noise as low as 20 dB, the lowest of these five
- The Frigidaire app handles schedules, air quality tracking and filter life
- Smart Mode responds to shifts in air quality on its own
- Voice control through Alexa or Google Assistant
- Lists 850 sq ft at one air change per hour, below Blueair SP4i at 3,385 and LG PuriCare 360 at 2,059
- Size: 9.2 x 9.2 x 16 in
- Coverage: 850 sq ft per hour
- Weight: 7.5 lb
The PureAir RAC-16 HEPA filter is listed to capture up to 99.99% of airborne particles as small as 0.3 microns. It works within a 3-stage filtration system.
A light indicator on the unit gives a quick air quality read. It weighs 7.5 pounds, with UL and FCC certification on the listing.
Right buyer for the Frigidaire PureA300
It suits small bedrooms and other quiet rooms where a low listed noise level matters.
Wrong buyer for the Frigidaire PureA300
Skip it if you want a fine particle sensor, since LG PuriCare 360 lists a PM1.0 sensor.
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How to Choose the Best Rated Smart Air Purifier
- Compare coverage on one basis. At one air change per hour, Blueair SP4i lists 3,385 sq ft, LG PuriCare 360 2,059 and Frigidaire PureA300 850.
- Count the filter stages. Blueair SP4i lists 7 HEPASilent stages, while the other four picks list 3.
- Pick a sensor you will use. LG PuriCare 360 lists a PM1.0 sensor, and Levoit Core 400S shows a live PM2.5 reading.
- Check low noise for bedrooms. Frigidaire PureA300 lists 20 dB, LG PuriCare 360 23 dB, Levoit Core 400S 24 dB and Levoit Core 200S-P 27 dB.
- Match voice control. Levoit Core 400S and Frigidaire PureA300 list Alexa and Google Assistant, while Blueair SP4i and Levoit Core 200S-P list Alexa.
Frequently Asked Questions
How were these five picks ranked?
We ranked them on standout specs from each Amazon listing. Blueair SP4i leads with 7 filter stages and 3,385 sq ft every hour.
Which pick is the quietest?
Frigidaire PureA300 lists noise as low as 20 dB. LG PuriCare 360 follows at 23 dB.
Which purifier here is the smallest?
Levoit Core 200S-P measures 8.1 by 8.1 by 12.6 inches and weighs 6.6 pounds. Frigidaire PureA300 is next at 9.2 by 9.2 by 16 inches.
Which picks show air quality as a color?
Blueair SP4i shows five colors in its air outlet, and LG PuriCare 360 moves from red to green on top. Frigidaire PureA300 uses a light indicator.
Final Verdict
Our best rated smart air purifier pick is the Blueair SP4i for its 7-stage filtration and 3,385 sq ft every hour. Choose Levoit Core 400S for a live PM2.5 readout and LG PuriCare 360 for a PM1.0 sensor.
Best Overall: Blueair Signature SP4i smart air purifier with 7-stage HEPASilent filtration Check Latest Price
Best Live PM2.5 Readout: Levoit Core 400S smart air purifier with AirSight Plus sensor Check Latest Price
Best Fine Particle Sensor: LG PuriCare 360 smart air purifier with PM1.0 sensor Check Latest Price
Look up the current replacement filter for each model on its listing before you buy filters.
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