Best Smart Air Purifiers: Apps, Sensors and Auto Modes That Work
The best smart air purifiers, chosen on AHAM CADR and on sensors and apps that do something useful: Levoit Core 400S-P, Blueair 211i Max, Winix 5510 and more.
Affiliate disclosure: product links on this page go to Amazon, or to the maker's own store for brands that sell only direct. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you; a link to a maker's store earns us nothing. No retailer or brand sees our picks before they are published or has any say in them. How we choose.
The best smart air purifier is the Levoit Core 400S-P. Its AirSight Plus laser sensor reads PM2.5 directly, its auto mode responds within seconds of cooking smoke or dust, and its VeSync app adds schedules, filter tracking and Alexa or Google Assistant control. AHAM Verifide rates it at 231 to 234 cfm of smoke CADR for about 360 square feet.
"Smart" covers everything from a useful particle sensor to an app that only duplicates the buttons. We rank on certified CADR first, then on the sensor: a laser particle sensor reads what a purifier removes, a gas sensor reads something else, and some purifiers have no sensor at all despite an app. For a buyer's guide to which features are worth the money, see smart features worth paying for.
Our top picks at a glance
1. Best smart purifier
Levoit Core 400S-PSmoke CADR: 231 to 234 cfm (AHAM) · Sensor: Laser PM2.5 · App and voice: VeSync, Alexa, Google · Room size: 358 to 363 sq ft (AHAM)
2. Best smart purifier for large rooms
Blueair Blue Pure 211i MaxSmoke CADR: 435 cfm (AHAM) · Sensor: Particle sensor · App and voice: Blueair app · Room size: 674 sq ft (AHAM)
3. Best smart purifier for pets
Levoit Vital 200S-PSmoke CADR: 250 cfm (AHAM) · Sensor: Infrared particle sensor · App and voice: VeSync, voice assistants · Room size: 388 sq ft (AHAM)
4. Best smart purifier for odors
Winix 5510Smoke CADR: 253 cfm (AHAM) · Sensor: Odor (gas) sensor, light sensor · App and voice: Winix Smart app, Alexa · Room size: 392 sq ft (AHAM)
5. Best smart purifier that is also a fan
Dyson Purifier Cool PC1Smoke CADR: Not published · Sensor: Air quality sensing (Dyson) · App and voice: MyDyson app, voice services · Room size: Not published
| Pick | Smoke CADR | Sensor | App and voice | Room size | Buy |
|---|---|---|---|---|---|
| Levoit Core 400S-PBest smart purifier | 231 to 234 cfm (AHAM) | Laser PM2.5 | VeSync, Alexa, Google | 358 to 363 sq ft (AHAM) | Amazon |
| Blueair Blue Pure 211i MaxBest smart purifier for large rooms | 435 cfm (AHAM) | Particle sensor | Blueair app | 674 sq ft (AHAM) | Amazon |
| Levoit Vital 200S-PBest smart purifier for pets | 250 cfm (AHAM) | Infrared particle sensor | VeSync, voice assistants | 388 sq ft (AHAM) | Amazon |
| Winix 5510Best smart purifier for odors | 253 cfm (AHAM) | Odor (gas) sensor, light sensor | Winix Smart app, Alexa | 392 sq ft (AHAM) | Amazon |
| Dyson Purifier Cool PC1Best smart purifier that is also a fan | Not published | Air quality sensing (Dyson) | MyDyson app, voice services | Not published | Amazon |
Best smart purifier
Levoit Core 400S-P
A laser PM2.5 sensor, a dependable auto mode and a full app, on certified airflow for 360 sq ft.
- Smoke CADR
- 231 to 234 cfm (AHAM)
- Sensor
- Laser PM2.5
- App and voice
- VeSync, Alexa, Google
- Room size
- 358 to 363 sq ft (AHAM)
Pros
- Laser sensor reads the particles it removes
- Works fully without the app
- 38 W
Cons
- Sensor does not read gases
- VeSync account needed for app features
A laser sensor counts particles in a sample of air, the same principle used in consumer air quality monitors, so the Core 400S-P's auto mode tracks what its filter is removing. The app adds schedules, filter-life tracking and remote control. See our Core 400S-P review.
Best smart purifier for large rooms
Blueair Blue Pure 211i Max
Particle sensor, app scheduling and geofencing on 435 cfm of certified CADR.
- Smoke CADR
- 435 cfm (AHAM)
- Sensor
- Particle sensor
- App and voice
- Blueair app
- Room size
- 674 sq ft (AHAM)
Pros
- Most certified CADR among smart picks
- Welcome Home geofencing (Blueair)
- 46 W
Cons
- Electrostatic stage
- Large for small rooms
Blueair's app includes scheduling, an air quality history and, according to Blueair's listings for the Max line, Welcome Home geofencing that starts the purifier as you approach home. Its auto mode is driven by a particle sensor. Read our 211i Max review.
Best smart purifier for pets
Levoit Vital 200S-P
Pet Mode, app control and an infrared sensor on 250 cfm of certified CADR.
- Smoke CADR
- 250 cfm (AHAM)
- Sensor
- Infrared particle sensor
- App and voice
- VeSync, voice assistants
- Room size
- 388 sq ft (AHAM)
Pros
- Pet Mode schedules extra airflow
- Second inlet for fur
- Two-year warranty
Cons
- Infrared sensor is less precise than laser
- $59.99 filters
An infrared sensor detects particles but cannot size or count them as precisely as a laser, so the auto mode reacts well to obvious events and less finely to slow changes. Pet Mode and schedules make up for it in a pet household. See our Vital 200S-P review.
Best smart purifier for odors
Winix 5510
An odor (gas) sensor and the Winix app on a purifier with a real carbon filter.
- Smoke CADR
- 253 cfm (AHAM)
- Sensor
- Odor (gas) sensor, light sensor
- App and voice
- Winix Smart app, Alexa
- Room size
- 392 sq ft (AHAM)
Pros
- Gas sensor suits cooking and odor problems
- Granular carbon panel
- PlasmaWave can be switched off
Cons
- Auto mode ignores dust and pollen
- Winix list price is high
The 5510's manual describes its Smart Sensor as detecting odorous gas, so its auto mode follows smells rather than particles. That is the right match for a kitchen-adjacent room, and the wrong one for pollen season. Our 5510 review explains.
Best smart purifier that is also a fan
Dyson Purifier Cool PC1
Dyson's app and air quality reports with a cooling fan; no published CADR.
- Smoke CADR
- Not published
- Sensor
- Air quality sensing (Dyson)
- App and voice
- MyDyson app, voice services
- Room size
- Not published
Pros
- Doubles as a cooling fan
- Detailed app reports
- Sealed HEPA and carbon filter
Cons
- No certified CADR
- Expensive
If you want a purifier fan with a polished app, the PC1 is it, but you are paying for design and the fan, not certified clean air. See our Dyson PC1 review.
How we chose smart purifiers
We required Wi-Fi app control and an automatic mode, ranked on certified smoke CADR from the AHAM Verifide directory, and then on the sensor type each maker describes. A purifier's sensor decides how well its auto mode works, and makers describe them in very different ways.
Smart purifier buying guide
Know which sensor you are buying
| Sensor | What it reads | Example | Auto mode is good for |
|---|---|---|---|
| Laser particle sensor | Particle counts by size, PM2.5 | Levoit Core 400S-P (AirSight Plus) | Smoke, dust, pollen, cooking particles |
| Infrared particle sensor | Presence of particles, less precisely | Levoit Vital 200S-P | Obvious particle events |
| Gas (odor) sensor | Changes in odorous gases | Winix 5510 | Cooking smells, odors |
| Multiple sensors | Particles plus gases, CO2 or humidity | Molekule Air Pro (as Molekule lists) | Monitoring, with a price |
App features that matter
- Schedules. Run it harder while you are out and quietly at night.
- Filter-life tracking based on run time, so you change filters on time.
- Air quality history, which shows when your home's particle spikes happen.
- Works offline. Check that the buttons on the purifier still control every mode if Wi-Fi drops.
Privacy and accounts
Smart purifiers need a maker account and connect to the maker's cloud. Read the privacy policy, use a strong password, and put smart home devices on a guest network if your router supports one. If you would rather not connect at all, buy a model whose buttons do everything.
A smart purifier is not a monitor
A purifier's sensor sits a foot from its own intake and is tuned to drive the fan. For an accurate reading of your room, a separate air quality monitor is more reliable, and it can tell you whether the purifier is working.
What to skip
- Apps on purifiers with no sensor, if you wanted an auto mode.
- Smart features in place of CADR. A great app does not make an undersized purifier clean a big room.
- Purifiers that require the app for basic modes.
Winix's app-connected option is covered in our Winix AM90 review.
Frequently asked questions
What is the best smart air purifier?
The Levoit Core 400S-P: a laser PM2.5 sensor drives its auto mode, its VeSync app adds schedules and filter tracking, and AHAM rates it at 231 to 234 cfm smoke CADR for about 360 sq ft.
Are smart air purifiers worth it?
A good sensor and auto mode are, because the purifier works harder when needed and quieter when not. An app alone, on a purifier without a sensor, mostly duplicates the buttons.
What is the difference between a laser and an infrared sensor?
A laser sensor counts particles in a sample of air and estimates PM2.5; an infrared sensor detects particles less precisely. Laser sensors make for more accurate auto modes.
Do smart air purifiers work without Wi-Fi?
The picks here keep their auto and manual modes on the purifier's own buttons. Schedules, history and remote control need the app.
Can a smart air purifier replace an air quality monitor?
Not reliably. Its sensor sits beside its own intake and is tuned to drive the fan. A separate monitor gives a better reading of the room.
Sources
- AHAM Verifide Directory: Certified Room Air Cleaners, Association of Home Appliance Manufacturers
- Levoit Core 400S-P Smart Air Purifier, Levoit
- Levoit Vital 200S-P Smart Air Purifier, Levoit
- 5510 & 5520 User Manual, Winix America
- Blue Pure 211i Max Air Purifier, Blueair
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