Our verdict
Pick the Levoit Core 300S-P if it will run in a bedroom and you want the lower price. Pick the Levoit Core 400S-P if it is the cheaper of the two on the day you buy.
The central trade-off
Smoke CADR. Levoit Core 400S-P Smart Air Purifier states 231 CFM; the other's maker page doesn't.
Quietest setting. Levoit Core 300S-P Smart Air Purifier: 22 dB; Levoit Core 400S-P Smart Air Purifier: 24 dB.
Price. When we checked, the Levoit Core 300S-P Smart Air Purifier listed for less ($150 against $220); prices move, so check both buttons.
Side by side
| Specification | Levoit Core 300S-P Smart Air Purifier | Levoit Core 400S-P Smart Air Purifier |
|---|---|---|
| Rated room size | Not stated by the maker | Not stated by the maker |
| Smoke CADR | Not stated by the maker | 231 CFM |
| CADR | Not stated by the maker | Not stated by the maker |
| Quietest setting | 22 dB | 24 dB |
| Noise | Not stated by the maker | 24 dB |
| Power draw | Not stated by the maker | Not stated by the maker |
| Filters | Not stated by the maker | Not stated by the maker |
| Warranty | 2 years | 2 years |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.
Which should you choose?
Choose the Levoit Core 300S-P Smart Air Purifier if
- It will run in a bedroom
- You want the lower price
Choose the Levoit Core 400S-P Smart Air Purifier if
- It is the cheaper of the two on the day you buy