
Smallest Levoit with app control; no particle sensor.
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Ranked by score among units with a sleep setting at or below 26 dB and enough CADR for a typical bedroom.

Smallest Levoit with app control; no particle sensor.
Strong CADR per dollar with app and auto mode; very quiet on low.

Quieter and more efficient than the 211+, with app control.

Large-room CADR from a light, efficient unit; short filter life raises running cost.

Very efficient CADR per watt; filters are rated for only six months.

Large-room Winix with heavy carbon and app; slightly costlier than the T810.
Efficient medium-room unit; superseded by the 311i Max.

Adds a washable prefilter and a pet-hair mode to the Core 400S formula.

Medium-room Blueair with very low power draw and app.

Levoit's flagship with a laser sensor and directional vent; expensive for the CADR.

Two-sided filtration with a real carbon layer; filters cost more than most.

High CADR at a quiet 52 dB maximum; annual filter cost is among the highest here.

Quiet at full speed and well built; price per CADR is high.

Airmega 400 with Wi-Fi app control.

Twin-filter unit with very high claimed CADR; not AHAM listed.

Tiny bedroom unit with auto mode and app; fine for a small room, not a living room.

The long-running benchmark: strong CADR for the price, a real auto mode and cheap annual filters.

Same internals as the Mighty in a square housing with a square filter.

Quiet for its CADR; the 930 sq ft claim is at 1 air change per hour, so treat it as a 370 sq ft unit for allergies.

Core 300 plus a PM2.5 sensor, auto mode and app.

Compact with a washable prefilter and auto mode.

Medium Alen with the same quiet motor; lifetime warranty with filter subscription.

The best-selling compact purifier; no auto mode, thin carbon, but cheap and quiet on low.
45i without the sensor or app.
Compact-plus unit with a particle sensor.

High claimed CADR for the money; not AHAM listed, and filters are short-lived.

Rabbit Air's larger unit with app and a laser sensor; premium price.

Compact unit with auto mode and a washable prefilter; filters are pricey for the CADR.

Budget medium-room unit; CADR is manufacturer-claimed.

Six-stage filtration and very quiet, but low CADR for the price.