Best air purifiers for 400 sq ft and allergies

Target smoke CADR 214 using 4 ACH and an 8 ft ceiling. Results come from AHAM Verifide CADR rows; CARB matches are marked when found.

Required smoke CADR = sqft x ceiling height x ACH / 60
400 x 8 x 4 / 60 = 214
AHAM 2/3 room-size cross-check: CADR >= 267

Model	Smoke CADR	AHAM room	CARB	Cost/CADR	Annual filter
LEVOIT LAP-C601S-WUSR 180 CADR above target	394	611 sq ft	Check CARB	$0.76	$59.99	Check price
LEVOIT LAP-C601S-AUS 177 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WCA 177 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WUS 177 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
Blueair Blue Signature 241 CADR above target	455	705 sq ft	Matched	$0.99	N/A	Check price
Medify Air MA-112 Pro 386 CADR above target	600	930 sq ft	Check CARB	$0.99	N/A	Check price
Medify Air MA-112 380 CADR above target	594	921 sq ft	Check CARB	$1.00	N/A	Check price
LEVOIT LAP-EL551S-AUS 140 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-AUSR 140 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-WUSB 140 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
WOZOYO Pure Air PA12 149 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
WOZOYO Pure Air PA6 149 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
Medify Air MA-WM45 1 CADR above target	215	333 sq ft	Check CARB	N/A	N/A	Check price
Blueair 5431111000 (DustMagnet 5410i) 2 CADR above target	216	335 sq ft	Check CARB	N/A	N/A	Check price
Blueair 5431112000 (DustMagnet 5440i) 2 CADR above target	216	335 sq ft	Check CARB	N/A	N/A	Check price
DREAME CVF61A 2 CADR above target	216	335 sq ft	Check CARB	N/A	N/A	Check price
Sharp KC-860U 6 CADR above target	220	341 sq ft	Check CARB	N/A	N/A	Check price
Daikin MCKB70YSAU 12 CADR above target	226	350 sq ft	Check CARB	N/A	N/A	Check price
Blueair 3in1 T20i (4232412000) 13 CADR above target	227	352 sq ft	Check CARB	N/A	N/A	Check price
Blueair 5431111000 (DustMagnet 5210i) 16 CADR above target	230	357 sq ft	Check CARB	N/A	N/A	Check price
Honeywell HPA5200B 17 CADR above target	231	360 sq ft	Check CARB	N/A	N/A	Check price
LEVOIT Core 400S 17 CADR above target	231	358 sq ft	Check CARB	N/A	N/A	Check price
LEVOIT Core 400S - W 17 CADR above target	231	358 sq ft	Check CARB	N/A	N/A	Check price
Blueair 6331411000 (2-in1 Purify + Humidify DH3i) 18 CADR above target	232	360 sq ft	Check CARB	N/A	N/A	Check price
Honeywell (Canada) HPA5250BC 19 CADR above target	233	361 sq ft	Check CARB	N/A	N/A	Check price