Find your filter
Match an air purifier to your room, or find a water filter certified for the exact contaminant you care about. Results are ranked by our composite score and, for water, restricted to genuinely certified units.
For about 4.8 air changes per hour, you want a smoke CADR of at least 162. 9 units qualify.
- 8.7Coway Airmega AP-1512HH MightyCADR 246 · ~381 sq ft
- 7.1Levoit Core 300SCADR 175 · ~271 sq ft
- 7.1Levoit Vital 200SCADR 289 · ~448 sq ft
- 6.5Levoit Core 400SCADR 259 · ~401 sq ft
- 5.0Honeywell HPA300CADR 320 · ~496 sq ft
- 4.3Dyson Purifier Big+Quiet Formaldehyde (BP03)CADR 200 · ~310 sq ft
- 4.0Coway Airmega 400CADR 400 · ~620 sq ft
- 3.9Alen BreatheSmart FlexCADR 225 · ~349 sq ft
- 3.3Shark Air Purifier 6 (HE601)CADR 175 · ~271 sq ft
Air matching uses the AHAM 2/3 rule (roughly CADR times 1.55 sq ft for about 4.8 air changes per hour). Water matching shows only filters certified on an official NSF, WQA, or IAPMO database for the selected contaminant.