Best air purifiers for 400 sq ft and dust

Target smoke CADR 160 using 3 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 3 / 60 = 160
AHAM 2/3 room-size cross-check: CADR >= 267

Model	Smoke CADR	AHAM room	CARB	Cost/CADR	Annual filter
LEVOIT LAP-C601S-WUSR 234 CADR above target	394	611 sq ft	Check CARB	$0.76	$59.99	Check price
LEVOIT LAP-C601S-AUS 231 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WCA 231 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
LEVOIT LAP-C601S-WUS 231 CADR above target	391	606 sq ft	Check CARB	$0.77	$59.99	Check price
Blueair Blue Signature 295 CADR above target	455	705 sq ft	Matched	$0.99	N/A	Check price
Medify Air MA-112 Pro 440 CADR above target	600	930 sq ft	Check CARB	$0.99	N/A	Check price
Medify Air MA-112 434 CADR above target	594	921 sq ft	Check CARB	$1.00	N/A	Check price
LEVOIT LAP-EL551S-AUS 194 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-AUSR 194 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
LEVOIT LAP-EL551S-WUSB 194 CADR above target	354	549 sq ft	Check CARB	$1.41	N/A	Check price
WOZOYO Pure Air PA12 203 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
WOZOYO Pure Air PA6 203 CADR above target	363	563 sq ft	Matched	N/A	N/A	Check price
Blueair 4512311000 (Blue signature SP1i) 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Blueair 4542411000 (Blue signature SP1i) 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Honeywell HFD310 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Honeywell HFD320 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Honeywell HFD323-TGT 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Honeywell (Canada) HFD310C 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Honeywell (Canada) HFD322C 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
LEVOIT LAP-C341S-***** 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
LEVOIT LAP-C341S-WCAZ 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
LEVOIT LAP-C341S-WUSZ 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Midea KJ300G-Z42D 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Pelonis PAF30D3AWW 1 CADR above target	161	250 sq ft	Check CARB	N/A	N/A	Check price
Winix T500 2 CADR above target	162	251 sq ft	Check CARB	N/A	N/A	Check price