The best HEPA smart air purifier pairs a HEPA filter with a sensor that tells the app when to act. Four of our five picks list an air quality sensor or monitor, and the fifth doubles as a cooling fan.
See also our best smart air purifier and smart HEPA 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 HEPA Smart Air Purifier Picks
Levoit EverestAir smart air purifier with 3-channel laser sensor
- 3-channel laser sensor reads PM10, PM2.5 and PM1.0
- Smart scenes can turn it on when air quality drops or off when you leave
- Sensor data helps pinpoint pollution sources and when air quality dips
Levoit Core 400S smart air purifier with AirSight Plus laser sensor
- AirSight Plus laser sensor shows the PM2.5 reading in real time
- Auto Mode adjusts fan speed to live air quality
- VeSync app sets schedules and timers and monitors filter life
Coway Airmega 400S HEPA smart air purifier with IoCare app
- IoCare app monitors indoor and outdoor air quality
- Smart Mode sets fan speed from the room’s air quality
- Eco Mode shuts the fan off after 30 clean minutes and restarts on pollution
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HEPA Smart Air Purifiers Side by Side
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  Levoit EverestAir smart air purifier with 3-channel laser sensor |
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| 2 |  Levoit Core 400S smart air purifier with AirSight Plus laser sensor |
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| 3 |  Coway Airmega 400S HEPA smart air purifier with IoCare app |
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| 4 |  Frigidaire PureA300 HEPA smart air purifier with air quality light |
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| 5 |  Dyson TP7C dual-direction HEPA air purifier and cool fan |
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1. Levoit EverestAir smart air purifier with 3-channel laser sensor
Best Overall
- 3-channel laser sensor reads PM10, PM2.5 and PM1.0
- Smart scenes can turn it on when air quality drops or off when you leave
- Sensor data helps pinpoint pollution sources and when air quality dips
- Lists a CADR of 354 CFM and 2,655 sq ft in one hour
- Lists 24 dB, above Frigidaire PureA300 at 20 dB and Coway Airmega 400S at 22 dB
- Low Noise: 24 dB
- Sensor: 3-channel laser
- CADR: 354 CFM
Levoit’s 3-channel laser sensor scans for particles at PM10, PM2.5 and PM1.0. You can review that data in the app to spot pollution sources and timing.
Smart scenes trigger actions from conditions, such as switching on when air quality drops. A washable pre-filter leads the 3-stage filter, and Levoit lists 60% more carbon than its Vital 200S-P.
Right buyer for the Levoit EverestAir
It suits a large living area where you want three particle sizes tracked and automatic actions set in the app.
Wrong buyer for the Levoit EverestAir
Skip it if you use Google Assistant, since Levoit Core 400S lists both Alexa and Google Assistant.
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2. Levoit Core 400S smart air purifier with AirSight Plus laser sensor
Best Live PM2.5 Reading
- AirSight Plus laser sensor shows the PM2.5 reading in real time
- Auto Mode adjusts fan speed to live air quality
- VeSync app sets schedules and timers and monitors filter life
- Works with Amazon Alexa and Google Assistant
- Its sensor reads PM2.5, while Levoit EverestAir also tracks PM10 and PM1.0
- Low Noise: 24 dB
- Sensor: AirSight Plus PM2.5 laser
- Size: 10.8 x 10.8 x 20.5 in
A pre-filter traps dust, lint, hair and pet fur ahead of a main filter listed at 99.97% capture. An activated carbon filter adsorbs smoke and odors.
For night use, Sleep Mode drops to the lowest fan setting and dims the screen, and display lights can be switched off. The unit weighs 12.8 pounds and stands 20.5 inches tall.
Right buyer for the Levoit Core 400S
It suits buyers who want a real-time PM2.5 number and voice control from either major assistant.
Wrong buyer for the Levoit Core 400S
Skip it if you want PM10 and PM1.0 data too, since Levoit EverestAir scans all three sizes.
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3. Coway Airmega 400S HEPA smart air purifier with IoCare app
Best Outdoor Air Monitoring
- IoCare app monitors indoor and outdoor air quality
- Smart Mode sets fan speed from the room’s air quality
- Eco Mode shuts the fan off after 30 clean minutes and restarts on pollution
- HEPA filter set listed to reduce 99.97% of 0.3 micron particles
- Lists only Alexa for voice, while Levoit Core 400S and Frigidaire PureA300 also list Google Assistant
- Low Noise: 22 dB
- Sensor: Air quality monitor
- Coverage: 3,120 sq ft in 60 min
Coway’s IoCare app places outdoor air quality next to indoor readings and also handles filter notices and scheduling. Smart Mode reads the room and sets fan speed to match.
The HyperCaptive set combines a pre-filter, active carbon and a HEPA filter. Coway lists coverage of 3,120 sq ft in 60 minutes and a weight of 24.7 pounds.
Right buyer for the Coway Airmega 400S
It suits a large home where you want outdoor air data beside indoor readings in one app.
Wrong buyer for the Coway Airmega 400S
Skip it if you use Google Assistant, since Frigidaire PureA300 lists Alexa and Google Assistant.
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4. Frigidaire PureA300 HEPA smart air purifier with air quality light
Best Low-Noise Pick
- Lists 20 dB, the lowest noise level among these picks
- Built-in light indicator shows air quality at a glance
- Smart Mode adjusts settings as air quality changes
- Frigidaire app tracks air quality and monitors filter life
- Lists 850 sq ft per hour, below Coway Airmega 400S at 3,120 and Levoit EverestAir at 2,655
- Low Noise: 20 dB
- Sensor: Air quality light indicator
- Weight: 7.5 lb
Frigidaire lists its PureAir RAC-16 HEPA filter to capture up to 99.99% of particles as small as 0.3 microns. It sits in a 3-stage system inside a 9.2 by 9.2 by 16 inch body.
Smart Mode reacts to air quality changes, and the app sets schedules and adjusts settings. The listing names Alexa and Google Assistant among its controllers.
Right buyer for the Frigidaire PureA300
It suits a small bedroom where a glanceable light indicator and the lowest listed noise matter most.
Wrong buyer for the Frigidaire PureA300
Skip it for open floor plans, since Levoit EverestAir lists 2,655 sq ft in one hour.
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5. Dyson TP7C dual-direction HEPA air purifier and cool fan
Best Fan and Purifier Combo
- HEPA filter with a listed 0.3 micron particle retention size
- App, remote and voice control
- Dual-direction design doubles as a cool fan
- Oscillating design listed among its features
- Lists 40 dB, above Frigidaire PureA300 at 20, Coway Airmega 400S at 22 and both Levoit picks at 24
- Low Noise: 40 dB
- Fan: Oscillating cool fan
- Size: 4.72 x 8 x 41 in
Dyson lists the TP7C as a dual-direction purifier and cool fan with a HEPA filter. Its particle retention size is given as 0.3 micron.
Control runs through an app, a remote or voice. The tower oscillates and stands 41 inches tall on a 4.72 by 8 inch base.
Right buyer for the Dyson TP7C
It suits a room where you want one tower to purify and cool, with app and remote control.
Wrong buyer for the Dyson TP7C
Skip it if low noise matters, since Frigidaire PureA300 lists 20 dB.
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How to Choose the Best HEPA Smart Air Purifier
- Check what the sensor reads. Levoit EverestAir scans PM10, PM2.5 and PM1.0, while Levoit Core 400S uses an AirSight Plus laser for PM2.5.
- See how each one responds. Levoit Core 400S Auto Mode and Coway Airmega 400S Smart Mode adjust fan speed, and Levoit EverestAir runs smart scenes.
- Look beyond the room. Coway Airmega 400S shows outdoor air quality in IoCare next to its indoor readings.
- Compare listed noise. Frigidaire PureA300 lists 20 dB, Coway Airmega 400S 22 dB, both Levoit picks 24 dB and Dyson TP7C 40 dB.
- Match voice control. Levoit Core 400S and Frigidaire PureA300 list Alexa and Google Assistant, while Levoit EverestAir and Coway Airmega 400S list Alexa.
Frequently Asked Questions
Which HEPA smart air purifier has the most detailed sensor?
Levoit EverestAir lists a 3-channel laser sensor for PM10, PM2.5 and PM1.0. Levoit says the data can help pinpoint pollution sources.
Can a smart purifier switch itself on when air quality drops?
Levoit EverestAir smart scenes can turn it on when air quality drops. Coway Airmega 400S Eco Mode restarts the fan when pollution is detected.
Which pick shows a live PM2.5 reading?
Levoit Core 400S uses an AirSight Plus laser sensor that displays PM2.5 in real time. Its Auto Mode then adjusts fan speed.
Which pick also works as a fan?
Dyson TP7C is listed as a dual-direction purifier and cool fan. It oscillates and takes app, remote and voice control.
Final Verdict
Our best HEPA smart air purifier pick is the Levoit EverestAir for its 3-channel laser sensor and app smart scenes. Choose Levoit Core 400S for a live PM2.5 reading and Coway Airmega 400S for outdoor air data.
Best Overall: Levoit EverestAir smart air purifier with 3-channel laser sensor Check Latest Price
Best Live PM2.5 Reading: Levoit Core 400S smart air purifier with AirSight Plus laser sensor Check Latest Price
Best Outdoor Air Monitoring: Coway Airmega 400S HEPA smart air purifier with IoCare app Check Latest Price
Check each listing for current filter part numbers before you order replacements.
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