Buying guide · Air purifiers
The best smart air purifiers with Wi-Fi and app control
Our top picks: the Levoit Core 400S (best overall), the Levoit Core 600S (best for big rooms) and the Coway Airmega AP-1512HHS (Mighty with Wi-Fi) (best Coway). A smart purifier is worth it for two things: seeing your room's air from your phone, and letting auto mode turn the purifier up when smoke or cooking fumes come in. Each pick has a particle sensor and an app.
The cleaning is the same as each purifier's plain sibling, so choose by room size first and the smart features second.
Updated · 6 picks · figures from AHAM, Energy Star, NIOSH and the makers · no brand pays to be listed
Quick picks
Best overall
Levoit Core 400SIt shows the room's PM2.5 on its own display and in the app, so you can watch it working, and it has no ionizer at all.
Best for big rooms
Levoit Core 600SThe big-room smart pick: 391 cfm for about 56 m², a laser particle sensor and the same app as the Core 400S.
Best Coway
Coway Airmega AP-1512HHS (Mighty with Wi-Fi)The Coway Mighty with Wi-Fi: the same 233 cfm, verified by AHAM, plus Coway's IoCare app, Alexa, Google, and auto and eco modes.
Best for pets
Levoit Vital 200SApp control with PM2.5 readings and a pet mode, and a washable pre-filter for hair.
Most clean air
Blueair Blue Pure 211i MaxThe most clean air here, 435 cfm by Blueair's rating, with Blueair's app, auto mode, Alexa and Google, for a large living room.
Best for a bedroom
Levoit Core 300SThe smart bedroom pick: laser particle sensor, auto mode, the VeSync app and a sleep mode from 22 dB, for a room of about 20 m².
| Purifier | Smoke CADR | Everyday room | Smoky days | Quietest | Filter | Price |
|---|---|---|---|---|---|---|
| Levoit Core 400SBest overall | 231 cfm | 33 m² (358 ft²) | 21 m² | — | $49.99 | $189.99at levoit.com |
| Levoit Core 600SBest for big rooms | 391 cfm | 56 m² (606 ft²) | 36 m² | 26 dB | $59.99every 6–12 months | $299.99at levoit.com |
| Coway Airmega AP-1512HHS (Mighty with Wi-Fi)Best Coway | 233 cfm | 34 m² (361 ft²) | 22 m² | 24.4 dB | — | $299.99at cowaymega.com |
| Levoit Vital 200SBest for pets | 250 cfm | 36 m² (388 ft²) | 23 m² | 27 dB | $49.99 | $169.99at levoit.com |
| Blueair Blue Pure 211i MaxMost clean air | 435 cfm | 63 m² (674 ft²) | 40 m² | 23 dB | — | $349.99at blueair.com |
| Levoit Core 300SBest for a bedroom | 141 cfm | 20 m² (219 ft²) | 13 m² | 22 dB | $29.99every 6–8 months | $149.99at levoit.com |
Everyday room: AHAM's room size for the smoke CADR (about five clean-outs an hour). Smoky days: AHAM's stricter advice for smoke, a CADR at least equal to the floor area in square feet. Quietest: the maker's figure for its lowest setting. Filter: the replacement's list price at its maker.
We earn a small commission when you buy through these links, at no extra cost to you. It never decides what's listed. As an Amazon Associate, Airleaf earns from qualifying purchases.
Best overall
Levoit Core 400S
It shows the room's PM2.5 on its own display and in the app, so you can watch it working, and it has no ionizer at all. Its 231 cfm (Energy Star) covers about 33 m².
- Cleans
- 33 m² day to day, 21 m² on smoky days
- Filter
- $49.99
- Live PM2.5 number on the unit
- No ionizer: Levoit says it makes no ions or ozone
- App, Alexa and Google
- Its filter costs more than the Core 300's
- Not enough for a big open-plan room
$189.99at levoit.com · sale price, was $219.99
Best for big rooms
Levoit Core 600S
The big-room smart pick: 391 cfm for about 56 m², a laser particle sensor and the same app as the Core 400S.
- Cleans
- 56 m² day to day, 36 m² on smoky days
- Quietest
- 26 dB
- Filter
- $59.99, every 6–12 months
- About 56 m² day to day
- Laser PM2.5 sensor
- App, Alexa and Google
- From 26 dB in sleep mode
- Its filter costs more than the smaller Levoits'
$299.99at levoit.com
Best Coway
Coway Airmega AP-1512HHS (Mighty with Wi-Fi)
The Coway Mighty with Wi-Fi: the same 233 cfm, verified by AHAM, plus Coway's IoCare app, Alexa, Google, and auto and eco modes.
- Cleans
- 34 m² day to day, 22 m² on smoky days
- Quietest
- 24.4 dB
- Same proven cleaning as the Mighty
- IoCare app, Alexa and Google
- From 24.4 dB on low
- Costs more than the plain Mighty for the same clean air
$299.99at cowaymega.com
Best for pets
Levoit Vital 200S
App control with PM2.5 readings and a pet mode, and a washable pre-filter for hair. 250 cfm covers about 36 m².
- Cleans
- 36 m² day to day, 23 m² on smoky days
- Quietest
- 27 dB
- Filter
- $49.99
- Pet mode and washable pre-filter
- PM2.5 readings in the app
- About 36 m²
- From 27 dB in sleep mode
- Its filter costs more than the Core 300's
$169.99at levoit.com · sale price, was $189.99
Most clean air
Blueair Blue Pure 211i Max
The most clean air here, 435 cfm by Blueair's rating, with Blueair's app, auto mode, Alexa and Google, for a large living room.
- Cleans
- 63 m² day to day, 40 m² on smoky days
- Quietest
- 23 dB
- About 63 m² day to day
- Air in from all sides
- App, Alexa and Google
- Its CADR is Blueair's own rating, not an AHAM test
- Premium price
$349.99at blueair.com
Best for a bedroom
Levoit Core 300S
The smart bedroom pick: laser particle sensor, auto mode, the VeSync app and a sleep mode from 22 dB, for a room of about 20 m².
- Cleans
- 20 m² day to day, 13 m² on smoky days
- Quietest
- 22 dB
- Filter
- $29.99, every 6–8 months
- Sleep mode from 22 dB
- Laser particle sensor and auto mode
- Inexpensive filter
- About 20 m²
- Costs more than the Core 300 for the same clean air
$149.99at levoit.com
What size do you need?
The single biggest mistake is a purifier too small for the room. Type yours in to see the clean air it needs, and which picks get there.
You need a smoke CADR of at least 108 cfm (your room is about 161 ft²).
On this list: Levoit Core 400S, Levoit Core 600S, Coway Airmega AP-1512HHS (Mighty with Wi-Fi), Levoit Vital 200S, Blueair Blue Pure 211i Max, Levoit Core 300S.
The rule is AHAM's, the US body that certifies CADR ratings: two-thirds of the floor area in square feet day to day, the full floor area for smoke. It assumes an 8 ft (2.4 m) ceiling; for a higher one, aim a little above it.
Is smart worth paying for?
The cleaning is the same as each purifier's plain sibling: the Coway Mighty and its Wi-Fi version, the AP-1512HHS, both move 233 cfm. What you pay for is auto mode, a phone view of the room's air, schedules and voice control.
It's worth it if you want the purifier to react on its own when smoke or cooking fumes come in, or to see whether your air is getting better. If you'd switch it on and leave it, the plain model costs less.
Auto mode is only as good as its sensor
A laser particle sensor, like those in Levoit's Core 300S, 400S and 600S, counts fine particles directly, so auto mode reacts to PM2.5, the part of smoke and smog that matters most.
Treat the number as a guide to whether the air is getting better or worse, not a lab measurement. A purifier's sensor sits right next to its own clean-air outlet.
Setting it up
Each needs its maker's app to connect, and voice control works through Alexa or Google Assistant. They all keep working from their own buttons and auto mode if you never connect them.
How we chose
A real sensor
A particle sensor that drives auto mode, not just a timer. Laser sensors respond to fine PM2.5 directly.
An app that helps
Air-quality history, filter life and schedules, plus Alexa or Google where the maker lists them.
Verified CADR
Sized by verified clean air, like every purifier in the shop.
We haven't lab-tested these ourselves. The rankings rest on independent ratings (AHAM's verified CADR, Energy Star's listings, NIOSH approvals) and the makers' own figures, each shown on the product's page with where it's from. No brand pays to be listed, and the order doesn't change with commission. We earn a small commission when you buy through our links.
Questions
- Are smart air purifiers worth it?
- If you'll use auto mode and want to see the air from your phone, yes. The filtration is the same as the non-smart version, so if you'd set it and forget it, the plain model costs less.
- Which smart air purifiers work with Alexa?
- Of the picks here, the Levoit Core 300S, 400S and 600S, the Coway AP-1512HHS and the Blueair Blue Pure 211i Max work with Alexa and Google Assistant, by their makers' listings.
- Do smart air purifiers need Wi-Fi to work?
- No. They run from their own buttons and auto mode without Wi-Fi; only the app and voice control need it.
- Can a smart purifier show my indoor air quality?
- The ones with a particle sensor show a PM2.5 level or a color, the Levoit Core 400S on its own display. Use it to see whether the air is improving, not as an exact reading.
- What's the difference between auto mode and a timer?
- A timer runs the fan for a set time whatever the air is like. Auto mode reads the sensor and turns the fan up when particles rise, then back down when the room is clean.
Before you buy
Check how bad the air gets where you live
A purifier matters most where the air is often unhealthy. See today's reading and the past week for your city, from the nearest ground stations.