Levoit Core 300S vs Levoit Core 400S
Bottom line
This one is a tie in our scoring at 7.1/10 each, so we split the recommendation by room. We score the Core 300S the better pick for a bedroom or small-to-medium room: its verified 175 cfm CADR is enough for its 219 sq ft rating, and at $375 over five years it is the cheaper unit to own. We score the Core 400S the better pick for a large living room, where its AHAM-verified 259 cfm CADR honestly backs the 358 sq ft rating that the 300S cannot reach. Buying the pricier 400S for a small room is, in our view, paying $190 over five years in filters for output you will not use. Both share the same weak spot in our scoring, certification at 5.0/10, since neither carries certification beyond AHAM CADR and Energy Star.
These two Levoit smart HEPA purifiers tie at 7.1/10 in our scoring, so the choice comes down to room size and running cost, not quality. The Core 400S verifies a higher 259 cfm pollen CADR through AHAM and covers a rated 358 sq ft, versus the Core 300S at 175 cfm and a rated 219 sq ft. That extra output costs more to feed: the 400S runs about $75 a year in filters ($565 over five years with the device), while the 300S runs about $45 a year ($375 over five years). Both use an H13 HEPA filter, both verify their CADR through AHAM, and neither uses any ozone-producing technology.
| 175 cfm (AHAM-verified) | CADR (independently verified?) | 259 cfm (AHAM-verified) |
| 7.0 | Verified Performance30% | 7.0 |
| 6.0 | Total Cost of Ownership25% | 6.0 |
| 5.0 | Certification15% | 5.0 |
| 8.0 | Safety15% | 8.0 |
| 10.0 | Practical Fit15% | 10.0 |
FAQ
- Is the Levoit Core 300S better than the Levoit Core 400S?
- In our scoring the Levoit Core 300S rates 7.1/10 and the Levoit Core 400S 7.1/10. This one is a tie in our scoring at 7.1/10 each, so we split the recommendation by room. We score the Core 300S the better pick for a bedroom or small-to-medium room: its verified 175 cfm CADR is enough for its 219 sq ft rating, and at $375 over five years it is the cheaper unit to own. We score the Core 400S the better pick for a large living room, where its AHAM-verified 259 cfm CADR honestly backs the 358 sq ft rating that the 300S cannot reach. Buying the pricier 400S for a small room is, in our view, paying $190 over five years in filters for output you will not use. Both share the same weak spot in our scoring, certification at 5.0/10, since neither carries certification beyond AHAM CADR and Energy Star.
- Which is better for a bedroom?
- In our scoring, the Core 300S. Its 175 cfm CADR is AHAM-verified and matches its 219 sq ft rating, which covers most bedrooms, and it runs quieter on cost at about $45 a year in filters versus $75 for the 400S. Both drop to a 24 dBA sleep level, so noise is not the deciding factor.
- Is the Core 400S worth the extra money?
- Only if your room is large. The 400S verifies a 259 cfm CADR through AHAM and honestly covers a rated 358 sq ft, which the 300S cannot reach. For a room of 219 sq ft or less, we see no scoring benefit to paying the higher up-front price and $565 five-year cost when the 300S delivers enough verified output for $375.
- Does the Core 400S really cover 358 sq ft?
- In our view its 358 sq ft rating is honest, because it is backed by the unit's own AHAM-verified CADR rather than a marketing claim. At that size it still delivers 4.8 air changes per hour in our calculation, the same rate the 300S hits in its smaller 219 sq ft rated room.