FitCheckrReplacement comparison
Core 300-RF vs Blue Pure 211+ filter
A: Core 300-RF
B: Blue Pure 211+ fi...
1/2 difference: Seal fit
Family: Levoit vs Blueair
Timing: 8 mo vs 6 mo
Illustrated fit map, not a product photo. Circled areas mark the fit details buyers should verify before treating these replacements as interchangeable. Different fit systems.
Quick verdict
Both are air purifier filters, but they serve completely different purifier bodies and cannot be swapped.
Official reference pages
Use these manufacturer pages to inspect current product photos, packaging, and model language. FitCheckr's diagram is an illustration of fit risks, not a copied product image.
Levoit
Levoit Core 300-RF Replacement Filter
Compact bedroom purifier owners using a Levoit Core 300.
Blueair
Blueair Blue Pure 211+ Particle + Carbon Filter
Larger-room Blue Pure 211+ owners who need the main particle and carbon filter.
| Fit signal | Core 300-RF | Blue Pure 211+ filter |
|---|---|---|
| Brand family | Levoit | Blueair |
| Replacement type | HEPA filter | Particle + carbon filter |
| OEM status | oem | oem |
| Replacement interval | Every 6-8 months depending on usage | About every 6 months |
Risk summary
Air purifier filter fit depends on diameter, seal, and airflow path. A loose filter reduces capture performance.