Every AHAM Verifide Air Purifier Ranked

Smallest Levoit with app control; no particle sensor.

Strong CADR per dollar with app and auto mode; very quiet on low.

Large-room Winix with app control and a heavy carbon filter at a mid-range price.

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

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

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

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Efficient medium-room unit; superseded by the 311i Max.

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

The 5500-2 without the remote and with a lighter carbon filter.

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

The best-selling compact purifier; no auto mode, thin carbon, but cheap and quiet on low.

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

5500-class performance with app control.

Airmega 400 with Wi-Fi app control.

A pellet-carbon filter you can wash, strong CADR, and a low street price; PlasmaWave can be switched off.

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

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

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

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

Winix's 360 sq ft platform in a taller cabinet with Wi-Fi.

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.