Levoit Core 300 True HEPA vs Levoit Core 400S Smart True
Both made our Best Air Purifiers Under $200 shortlist, at #1 and #3. Here's how they differ and who each one suits.
- BuyOnceRight Research Desk
- Updated
- 4 min read
Quick verdict
Choose the Levoit Core 300 True HEPA Air Purifier if you want genuine true HEPA at under 110 dollars, cheapest legitimate option for an allergy bedroom. Choose the Levoit Core 400S Smart True HEPA Air Purifier if you'd rather have real particle sensor with a numeric air quality display gives genuine feedback, not just a status light. Overall we rank the Levoit Core 300 True HEPA Air Purifier higher: #1 versus #3 in our Best Air Purifiers Under $200 list.
Winner overall: Levoit Core 300 True HEPA Air Purifier
Levoit Core 300 True HEPA Air Purifier vs Levoit Core 400S Smart True HEPA Air Purifier compared
Every difference that matters, in one table.
| Attribute | ||
|---|---|---|
| Our ranking | #1 of 10 in Best Air Purifiers Under $200 | #3 of 10 in Best Air Purifiers Under $200 |
| Pick label | ||
| Brand | Levoit | Levoit |
| Key features | 141 smoke CADR covers ~215 sq ft; True HEPA at 99.97% capture; 24 dB sleep mode | ~260 smoke CADR covers ~400 sq ft; Wi-Fi app control and scheduling; Particle sensor with numeric AQI display |
| Biggest strength | Genuine true HEPA at under 110 dollars, cheapest legitimate option for an allergy bedroom | Real particle sensor with a numeric air quality display gives genuine feedback, not just a status light |
| Main trade-off | 141 CADR caps honest coverage at about 215 sq ft, undersized for anything beyond a bedroom or small office | Costs meaningfully more than the Core 300 for buyers who don't need Wi-Fi or auto mode |
| Best for | allergies | allergies |
Which should you buy?
#1 pick
Choose the Levoit Core 300 True HEPA Air Purifier if…
- Genuine true HEPA at under 110 dollars, cheapest legitimate option for an allergy bedroom
- 24 dB sleep mode is quiet enough that most owners stop noticing it within a day
- 360-degree intake is far more forgiving about placement in a cramped bedroom than rear-intake rectangular units
Best for: allergies
Prefer the alternative? See the Levoit Core 400S Smart True HEPA Air Purifier section.
#3 pick
Choose the Levoit Core 400S Smart True HEPA Air Purifier if…
- Real particle sensor with a numeric air quality display gives genuine feedback, not just a status light
- App scheduling lets the unit ramp down automatically overnight, which suits continuous allergy-season operation
- 260 smoke CADR covers a genuinely mid-size room, wider than the base Core 300
Best for: allergies
Prefer the alternative? See the Levoit Core 300 True HEPA Air Purifier section.
Pros and cons of each
Levoit Core 300 True HEPA Air Purifier
Pros
- Genuine true HEPA at under 110 dollars, cheapest legitimate option for an allergy bedroom
- 24 dB sleep mode is quiet enough that most owners stop noticing it within a day
- 360-degree intake is far more forgiving about placement in a cramped bedroom than rear-intake rectangular units
- No ionizer means no ozone byproduct and nothing to remember to switch off, a real plus for allergy and asthma households
- 96,000 ratings is the largest owner base of any purifier in this category
Cons
- 141 CADR caps honest coverage at about 215 sq ft, undersized for anything beyond a bedroom or small office
- No air quality sensor or auto mode, fan speed is entirely manual
- Carbon layer is a thin coating that fades within weeks of a filter change
- No washable pre-filter, so pet hair loads directly onto the HEPA media
Levoit Core 400S Smart True HEPA Air Purifier
Pros
- Real particle sensor with a numeric air quality display gives genuine feedback, not just a status light
- App scheduling lets the unit ramp down automatically overnight, which suits continuous allergy-season operation
- 260 smoke CADR covers a genuinely mid-size room, wider than the base Core 300
- Quieter than the Winix 5500-2 at equivalent fan speeds
- 28,000 ratings at 4.7 stars show the auto mode holds up over real-world use
Cons
- Costs meaningfully more than the Core 300 for buyers who don't need Wi-Fi or auto mode
- App dependency adds a setup step and occasional connectivity friction that manual units avoid
- Same thin carbon coating as the Core 300, so odor performance is still limited
- Proprietary filter cartridge not shared with other Core-series models
Levoit Core 300 True HEPA Air Purifier vs Levoit Core 400S Smart True HEPA Air Purifier: common questions
Which is better, the Levoit Core 300 True HEPA Air Purifier or the Levoit Core 400S Smart True HEPA Air Purifier?
Choose the Levoit Core 300 True HEPA Air Purifier if you want genuine true HEPA at under 110 dollars, cheapest legitimate option for an allergy bedroom. Choose the Levoit Core 400S Smart True HEPA Air Purifier if you'd rather have real particle sensor with a numeric air quality display gives genuine feedback, not just a status light. Overall we rank the Levoit Core 300 True HEPA Air Purifier higher: #1 versus #3 in our Best Air Purifiers Under $200 list.
What is the difference between the Levoit Core 300 True HEPA Air Purifier and the Levoit Core 400S Smart True HEPA Air Purifier?
The Levoit Core 300 True HEPA Air Purifier stands out because genuine true HEPA at under 110 dollars, cheapest legitimate option for an allergy bedroom, while the Levoit Core 400S Smart True HEPA Air Purifier stands out because real particle sensor with a numeric air quality display gives genuine feedback, not just a status light. The trade-offs differ too: the Levoit Core 300 True HEPA Air Purifier's main caveat is that 141 CADR caps honest coverage at about 215 sq ft, undersized for anything beyond a bedroom or small office, and the Levoit Core 400S Smart True HEPA Air Purifier's is that costs meaningfully more than the Core 300 for buyers who don't need Wi-Fi or auto mode.
Is the Levoit Core 300 True HEPA Air Purifier worth it over the Levoit Core 400S Smart True HEPA Air Purifier?
For most buyers, yes: it's our #1 pick. Consider the Levoit Core 400S Smart True HEPA Air Purifier instead if 141 CADR caps honest coverage at about 215 sq ft, undersized for anything beyond a bedroom or small office is a deal-breaker for you.
Who should buy the Levoit Core 400S Smart True HEPA Air Purifier instead of the Levoit Core 300 True HEPA Air Purifier?
The Levoit Core 400S Smart True HEPA Air Purifier suits allergies, while the Levoit Core 300 True HEPA Air Purifier is best for allergies.