As an Amazon Associate I earn from qualifying purchases.Updated: March 19, 2026
The Activated Carbon Filter in your Levoit Classic 300S helps remove odors, smoke, and volatile organic compounds from the air. Over time, these pollutants build up on the filter's surface, reducing its effectiveness. Replacing the filter regularly ensures your purifier continues to deliver fresh, clean air. Delaying replacement can lead to reduced air quality and potential strain on the device's motor.
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Function: The Activated Carbon Filter uses adsorption to trap odor-causing molecules and harmful gases.
Signs it needs replacing: Reduced odor removal efficiency, musty smells even when the purifier is running, visible discoloration or buildup on the filter surface.
OEM vs aftermarket: OEM filters guarantee compatibility but are typically more expensive. Aftermarket filters offer a budget-friendly alternative but verify their quality and fit before purchasing.
Installation: Generally straightforward. Unplug the purifier, remove the old filter according to the user manual, and insert the new filter securely.
Replacement schedule: every 6 months
Compatibility warning: always verify part number LF-AF01 matches your exact model (HEACRF301-UV) before ordering
Pros & Cons
Pros
✓ Restores device to original performance without buying a new unit
✓ Significantly cheaper than a full device replacement
✓ Multiple options available from OEM and aftermarket sellers
Cons
✗ OEM parts cost more than third-party alternatives
✗ Wrong part number will not fit — model verification is essential
Common Use Cases
Scheduled maintenance: replacing on the every 6 months schedule
Performance restoration after noticing reduced output or efficiency
Preventive replacement before a worn part causes secondary damage
Who Should Buy This
This replacement filter is for Levoit Classic 300S owners who notice a decline in odor removal performance and want to extend their purifier's lifespan.
Not ideal for: If your Levoit Classic 300S has malfunctioning electronics or other major issues, replacing the entire unit might be more cost-effective.
Good to Know Before Buying
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Always confirm your exact model number (HEACRF301-UV) before ordering. Part numbers vary between model variants and production years. Check the label on your device or original documentation to be sure.
Frequently Asked Questions
What is the part number for the Levoit Classic 300S Activated Carbon Filter?
The part number is LF-AF01. Always verify this matches your exact model (HEACRF301-UV) before ordering, as similar models may use different parts.
How often should I replace the Activated Carbon Filter on my Levoit Classic 300S?
every 6 months
Will aftermarket Activated Carbon Filter replacements work in my Levoit Classic 300S?
Third-party parts are widely available and often cheaper than OEM. Look for listings that specifically mention compatibility with model HEACRF301-UV and check buyer reviews for fit confirmation before purchasing.
Prices change frequently. See the latest deal on Amazon.