Best air purifiers for 600 sq ft and allergies

Target smoke CADR 320 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
600 x 8 x 4 / 60 = 320
AHAM 2/3 room-size cross-check: CADR >= 400

Model	Smoke CADR	AHAM room	CARB	Cost/CADR	Annual filter
LEVOIT LAP-C601S-WUSR 74 CADR above target	394	611 sq ft	Check CARB	$0.76	$59.99	Check price
LEVOIT LAP-C601S-AUS 71 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WCA 71 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WUS 71 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
Blueair Blue Signature 135 CADR above target	455	705 sq ft	Matched	$0.99	N/A	Check price
Medify Air MA-112 Pro 280 CADR above target	600	930 sq ft	Check CARB	$0.99	N/A	Check price
Medify Air MA-112 274 CADR above target	594	921 sq ft	Check CARB	$1.00	N/A	Check price
LEVOIT LAP-EL551S-AUS 34 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-AUSR 34 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-WUSB 34 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
WOZOYO Pure Air PA12 43 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
WOZOYO Pure Air PA6 43 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
Aerus 4431311001(Blue signature SP3i)(ROW) 1 CADR above target	321	498 sq ft	Check CARB	N/A	N/A	Check price
Blueair 4412311000(Blue signature SP3i) 1 CADR above target	321	498 sq ft	Check CARB	N/A	N/A	Check price
Blueair 4431311000(Blue signature SP3i)(ROW) 1 CADR above target	321	498 sq ft	Check CARB	N/A	N/A	Check price
Blueair 4432311000(Blue signature SP3i)(ROW) 1 CADR above target	321	498 sq ft	Check CARB	N/A	N/A	Check price
Blueair 4442411000(Blue signature SP3i)(ROW) 1 CADR above target	321	498 sq ft	Check CARB	N/A	N/A	Check price
Blueair 4442411001(Blue signature SP3i)(ROW) 1 CADR above target	321	498 sq ft	Check CARB	N/A	N/A	Check price
Insigna NS-APLWH2 1 CADR above target	321	497 sq ft	Check CARB	N/A	N/A	Check price
Winix D480 1 CADR above target	321	498 sq ft	Check CARB	N/A	N/A	Check price
Honeywell HPA5300B 3 CADR above target	323	500 sq ft	Check CARB	N/A	N/A	Check price
Sharp FX-J80U-W 4 CADR above target	324	502 sq ft	Check CARB	N/A	N/A	Check price
Sharp FX-J80U-W 4 CADR above target	324	502 sq ft	Check CARB	N/A	N/A	Check price
Wood's ELFI 900 WAP901 GRAN 900 5 CADR above target	325	504 sq ft	Check CARB	N/A	N/A	Check price
Field Controls TRIO Plus S 7 CADR above target	327	507 sq ft	Check CARB	N/A	N/A	Check price