Best air purifiers for 500 sq ft and allergies

Target smoke CADR 267 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
500 x 8 x 4 / 60 = 267
AHAM 2/3 room-size cross-check: CADR >= 334

Model	Smoke CADR	AHAM room	CARB	Cost/CADR	Annual filter
LEVOIT LAP-C601S-WUSR 127 CADR above target	394	611 sq ft	Check CARB	$0.76	$59.99	Check price
LEVOIT LAP-C601S-AUS 124 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WCA 124 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WUS 124 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
Blueair Blue Signature 188 CADR above target	455	705 sq ft	Matched	$0.99	N/A	Check price
Medify Air MA-112 Pro 333 CADR above target	600	930 sq ft	Check CARB	$0.99	N/A	Check price
Medify Air MA-112 327 CADR above target	594	921 sq ft	Check CARB	$1.00	N/A	Check price
LEVOIT LAP-EL551S-AUS 87 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-AUSR 87 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-WUSB 87 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
WOZOYO Pure Air PA12 96 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
WOZOYO Pure Air PA6 96 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
Carrier Carrier-18S 0 CADR above target	267	413 sq ft	Check CARB	N/A	N/A	Check price
Blueair 7423352000 (7470i) 3 CADR above target	270	418 sq ft	Check CARB	N/A	N/A	Check price
Sharp FP-J80E-H 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Sharp FP-J80EP-H 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Sharp FP-J80EV-H 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Sharp FP-J80L-H 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Sharp FP-J80M-H 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Sharp FP-J80TA-H 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Sharp FP-J80Y-H 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Sharp FX-J80J-W 3 CADR above target	270	419 sq ft	Check CARB	N/A	N/A	Check price
Winix T810 3 CADR above target	270	418 sq ft	Check CARB	N/A	N/A	Check price
Winix T830 3 CADR above target	270	418 sq ft	Check CARB	N/A	N/A	Check price
Blueair 7413352000 (7470i) 5 CADR above target	272	422 sq ft	Check CARB	N/A	N/A	Check price